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Infinity Kappa K600

Mono subwoofer amplifier — 600 watts RMS x 1 at 2 ohms

53 Reviews | 6 questions - 21 answers

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Item # 108K600

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Was: $399.99

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Overview

Our take on the Infinity Kappa K600

Infinity's Kappa K600 mono subwoofer amplifier supplies your subwoofer with up to 600 watts RMS — good news for all you bass fans out there. The space age-looking brushed aluminum chassis features dancing, signal-level LEDs which add to the amp's high-tech look and overall coolness factor.

High tech and stylish

Infinity's Kappa K600 mono subwoofer amplifier supplies your subwoofer with up to 600 watts RMS — good news for all you bass fans out there. The space age-looking brushed aluminum chassis features dancing, signal-level LEDs which add to the amp's high-tech look and overall coolness factor.

Connectivity is the name of the game

This amplifier can accept low- or speaker-level inputs so it'll work in almost any system. Infinity includes screw-on RCA-to-bare wire adapters with the amp to make sure you can make the proper connections. The Kappa K600 sub amp will integrate perfectly into a system that uses a matching Infinity Kappa K2 or Kappa K4 full-range amplifier with its handy Bluetooth® connection.

Good with bass

A low-pass filter clears the way for your sub to play clean, powerful bass. The Kappa K600 subwoofer amp also features Infinity's Dynamic Bass Optimizer (DBO™) circuitry, which uses a subsonic filter and bass boost to optimize the performance of your sub and enclosure combo.

Infinity K600

Kappa K600 input and control panel

Confused about impedance? Check out our article on matching subs and amps.

Product Highlights:

  • mono subwoofer amplifier
  • 380 watts RMS x 1 at 4 ohms (600 watts RMS x 1 at 2 ohms)
  • variable low-pass filter (32-320 Hz, 12 dB/octave)
  • Dynamic Bass Optimizer uses variable bass boost (0-12 dB at 45 Hz) and subsonic filter (10-80 Hz)
  • phase switch (0, 180 degrees)
  • preamp and speaker-level inputs
  • speaker wire-to-RCA adapters included
  • fuse rating: 35A x 2
  • 4-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • 10-1/4"W x 1-3/4"H x 6-15/16"D
  • warranty: 1 year
  • Our 60-day money-back guarantee

What's in the Box:

  • Mono amplifier
  • Four 35A ATO fuses (2 installed)
  • 2 Bare wire-to-RCA adapters
  • 4 Mounting screws (M4 x 52mm)
  • Quick Start Guide

It is powerful and compact. Fits behind the seat if my 09 Tacoma perfectly. I would highly recommend this product if someone wants a lot of power for a reasonable price.

James, Abingdon, MD

Reviews

Infinity Kappa K600 Reviews

Average Customer Review(s):

(53 Reviews)

Infinity Kappa K600

Crutchfield customer from Enid, OK on 3/19/2019

Crutchfield Customer Review (What's this?)

No issues

Pros:

Cons:

Infinity Kappa K600

Crutchfield customer from Mokelumne Hill, CA on 3/19/2019

Crutchfield Customer Review (What's this?)

Quick delivery and very easy to install!

Pros:

Cons:

Great Value

Will from Baldwin City, Kansas on 3/12/2019

This amp is a GREAT value! I recently installed this amp to power my old school Diamond D6 12". It really hits hard! I am more than happy with this purchase and have since used an Infinity Kapa K4 to power my components. This system sounds very good! Best system I have had as an amateur audiophile. Thanks Crutchfield for the value!

Pros: The power is ALL THERE! When they say 600RMS, they mean it! Small design, keeps cool, great appearance!

Cons: The only thing I would say is that it could use a remote gain knob. I chose to use an in-line passive level knob and it works just as well! Really nothing negative to report.

A big punch for a little money

James from Abingdon, MD on 3/12/2019

Crutchfield Customer Review (What's this?)

It is powerful and compact. Fits behind the seat if my 09 Tacoma perfectly. I would highly recommend this product if someone wants a lot of power for a reasonable price.

Pros: Small size Powerful Looks great

Cons:

Infinity Kappa K600

Gerardo from Eloy, AZ on 3/11/2019

Crutchfield Customer Review (What's this?)

Very surprised with the kick that that app has. Very happy with product

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Infinity Kappa K600

Crutchfield customer from North Liberty, IA on 3/7/2019

Crutchfield Customer Review (What's this?)

So much power, paired perfectly with a Kappa 800w 8" set at 4ohms!

Pros:

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Highly disappointed, the end of infinity for me.

Josh from Oak Ridge, TN on 3/6/2019

Crutchfield Customer Review (What's this?)

I'm not sure if mine is defective, or if they all have this problem, but the output is definitely not 380w RMS. More like 100w rms. The louder you turn the input, the less bass you get. my $40 axxera axa20 can beat the pants off this thing. It seems to me the onboard software or something is limiting bass output. Adjusting every knob on the amp and every setting on the stereo yields no results. The JBL looks to be the same too, I'd spend my money on something else!

Pros: good sound clarity, nice build quality, small.

Cons: sounds like 100w RMS output, weak bass, bad design.

Crutchfield response on 3/11/2019 Josh contacted our Customer Support team and set up a return. Purchases from Crutchfield can be returned or exchanged within 60 days.

Infinity Kappa K600

Crutchfield customer from Columbus, GA on 3/3/2019

Crutchfield Customer Review (What's this?)

Great amp. Pushing one 12" Punch P3. Sounds great.

Pros:

Cons:

Infinity Kappa K600

Seth from Lebanon, IN on 2/28/2019

Crutchfield Customer Review (What's this?)

Wow awesome all the way around!!!

Pros: Price, power, craftsmanship

Cons: None

Infinity Kappa K600

Crutchfield customer from Sacramento, CA on 2/19/2019

Crutchfield Customer Review (What's this?)

Great amp needed an amp for one ten" Kappa subwoofer that I put in my wife's Jeep wrangler JL. Sounds great and the price for a 600w amp @ 2onms was the best part!

Pros: Price and power

Cons: None

Infinity Kappa K600

Crutchfield customer from Olympia, WA on 2/4/2019

Crutchfield Customer Review (What's this?)

Compact, great price and Awesome performance!

Pros:

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Infinity Kappa K600

Crutchfield customer from Roseville, CA on 1/27/2019

Crutchfield Customer Review (What's this?)

Amazing amp more amazing was the customer service I appreciate you crutchfield

Pros: Amazing sound and power given.

Cons: First one died

Infinity Kappa K600

Crutchfield customer from Goodland, KS on 1/13/2019

Crutchfield Customer Review (What's this?)

Did not like this amp was excited it finally got here I got it hooked up and blah. Horrible. Had high expectations for this amp it let me down big time. Have it hooked to a rockford 10" at 4 ohms and it don't have very much power. Will be returning

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Infinity Kappa K600

Crutchfield customer from Loveland, CO on 12/31/2018

Crutchfield Customer Review (What's this?)

Sturdy, high quality built amp. Size is very nice for install. Adjustments are plentiful. Put it up with a svc kappa 12" 2ohm in a sealed box, stock stereo with lc2I interface. Not getting that big SPL but it is some of the cleanest bass have heard and can tune to the SQ great with this amp. Great amp worth the price.

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Infinity Kappa K600

Crutchfield customer from Lakeland, FL on 12/23/2018

Crutchfield Customer Review (What's this?)

Great amp...great price!!

Pros: Everything about it is great

Cons: None

Infinity Kappa K600

Jerry from Mc Veytown, PA on 12/16/2018

Crutchfield Customer Review (What's this?)

I love this.....i have it pushing 2- 12 inch duals in a bandpass box....needless to say it rocks....i wanna thank lea for helping me

Pros: It pushes the 2 -12s i have very well

Cons: None

Infinity Kappa K600

Crutchfield customer from The Colony , TX on 12/15/2018

Crutchfield Customer Review (What's this?)

Great amp for the price. Push a Alpine type s 10 hits hard

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Infinity Kappa K600

Ivan from Miami, FL on 12/14/2018

Crutchfield Customer Review (What's this?)

Works as advertised.

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Infinity Kappa K600

Crutchfield customer from Princeville, HI on 12/12/2018

Crutchfield Customer Review (What's this?)

Great little amp have to bazooka tubes hooked up in 2ohm 600rms. Strong amp very happy!

Pros: Small and strong

Cons:

Infinity Kappa K600

Austin from Billings , MT on 11/8/2018

Crutchfield Customer Review (What's this?)

Beautiful, compact, powerful little amp. Looks and feels high quality

Pros: Power

Cons: Didn't come with an Allen wrench for its mounting screws

Infinity Kappa K600

John from Caledonia, WI on 11/4/2018

Crutchfield Customer Review (What's this?)

Awesome amp. Powering two cheap 4 ohm 10s in an enclosed box it hits pretty hard. Wired it bridged. Just wish it could have a remote hooked up. For the price I am super happy. Would recommend it to anyone looking to add solid bass to their vehicle.

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GOOD FOR A YEAR ONLY

dave from White Haven, PA on 10/31/2018

Crutchfield Customer Review (What's this?)

after a year and 2 months it crapped the bed

Pros: cheap

Cons: doent last too long

Infinity Kappa K600

Elvio from Palm Coast, FL on 10/29/2018

Crutchfield Customer Review (What's this?)

Runs stupid hot.

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Buy It

Dean from Oakland, ME on 10/20/2018

Crutchfield Customer Review (What's this?)

I'm using this to power 2 12 inch Kicker Comp R's. I have zero complaints. This amp powers those subs with zero problems, and sounds amazing. The LED decibel meter is also a nice touch. The amp itself is very nice looking as well as compact.

Pros: Powers subs without fault Clean looking Sounds amazing

Cons: None

Perfect amp

Brian from Chester, PA on 10/5/2018

Crutchfield Customer Review (What's this?)

Amp sounds excellent. It's very small so it's not in the way of anything and it bumps my 2 12" fosgates very clean and very deep. I'm very happy I got this amp

Pros: Loud Easy set up Amazing deep bass Compact

Cons: Honestly none

Infinity Kappa K600

Jason from South Whitley, IN on 9/24/2018

Crutchfield Customer Review (What's this?)

Great price, awesome power, compact unit. Great power using it on 2 sound ordnance 12's in a Durango and it's insane.

Pros: Power, size, price,

Cons: None

Infinity Kappa K600

Crutchfield customer from Bothell, WA on 9/14/2018

Crutchfield Customer Review (What's this?)

Pure power, Perfect size unit. But then Infinity speaks for itself you get what you pay for. When it comes to an amp you never what to settle for anything less or you will be unhappy. Shipping and Crutchfield customer service stellar as always. I will continue to shop for my car audio here.

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Infinity Kappa K600

Josh from Wichita, KS on 9/8/2018

Crutchfield Customer Review (What's this?)

Great amp for the price. Have it running two kicker 10s at 300W rms a piece and it sounds great.

Pros: Compact size Well built Looks cool

Cons: No bass knob

It took time to grow on me!!!

Arthur from Laurel, MD on 9/1/2018

Crutchfield Customer Review (What's this?)

Very nice amp I did not like ot at 1st. Took a lot of time to get ot adjusted properly, but once I got it set it is great The more it plays the better it sounds

Pros: Cost Size

Cons: Take a lot of tweaking to setup

Infinity Kappa K600

David from Detroit Lakes, MN on 8/31/2018

Crutchfield Customer Review (What's this?)

Does everything thing you would want from a subwoofer amp. Driving to 12 inch subs in a ported box with no problem ,and sound is excellent .

Pros:

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Infinity Kappa K600

Mike from Odon, IN on 8/18/2018

Crutchfield Customer Review (What's this?)

Great amp!! Worked well with my Kenwood sub!

Pros: Sleek design and well built!! Easy Installation! Excellent bass response with gain around half!!

Cons: None yet.

Kappa 600

Tobias from Wichita, KS on 8/7/2018

Crutchfield Customer Review (What's this?)

Great amp for the money...i have nothing to complain about,small,powerful,gets the job done.

Pros: Small,powerful,easy install.

Cons: None yet

Infinity Kappa K600

Joshua from Broomfield, CO on 7/31/2018

Crutchfield Customer Review (What's this?)

Shocked! I bought this to run a dual 4ohm voice coil Alumpro Alchemy RX which it ran just fine wired in parallel for a 2 ohm load. Just for fun, I decided to also hook up my JL 10w3 2 ohm, for a load of 4 ohms. It POUNDED. I couldn't believe it. Turns out I had it wrong- I had wired them in parallel (two 4-ohm VCs and a 2 ohm) for a load of 1 ohm. It's pushing them all day with the gain at about half, putting out I'm guessing close to 1000 watts. Crazy. Super, super impressed!

Pros:

Cons:

It's all about the bass response !

Kutz from Bartlett, TN on 7/19/2018

Crutchfield Customer Review (What's this?)

So good I bought 2....Replacing old JVC in my truck and and 1 for the boat.

Pros: Great price for quality product,!

Cons: Including some verbiage in the manual (both full and summary versions) about magnetic access panel for the set screws have been a real benefit. Had to relay on Youtube for this hidden little secret.

Bad upgrade

Juan from Minneapolis , MN on 7/8/2018

Crutchfield Customer Review (What's this?)

I sold my Alpine 450 to upgrade to this one. Bad move. Now it can barely power the same Rockford even with the "gain " all the way up. It was recommended to me by Crutchfield advisor to power two 10" kickers that I'm thinking in buying in the near future. I don't see how this amplifier is going to work with two 10" when it can't even work with one 10" Rockford. I think I'll send it back and switch to Alpine 500

Pros: Small foot print. Cool design.

Cons: Minimum impedance on bridged mode is 4 ohms.

Crutchfield response on 7/9/2018 Juan, we're sorry you're disappointed with your amp. Whenever you encounter a problem with anything you purchase from Crutchfield, please contact our Tech Support team. They can help you solve the problem or set up a return within 60 days of purchase. Lifetime tech support comes with every Crutchfield purchase.

Infinity Kappa K600

Crutchfield customer from Huntsville, AL on 7/6/2018

Crutchfield Customer Review (What's this?)

Great amp!

Pros:

Cons:

Infinity Kappa K600

Matthew from La Grange, KY on 6/30/2018

Crutchfield Customer Review (What's this?)

Awesome Amp very pleased.

Pros:

Cons:

Infinity Kappa K600

Steven from Clinton Twp, MI on 6/17/2018

Crutchfield Customer Review (What's this?)

Small, strong, great sound quality, and elegant looks!

Pros: I think it's pushing more than the 1200 that it's rated to, and looks beautiful!

Cons: The magnetic plate that covers some stuff can be a pain in the butt to get off!

Infinity Kappa K600

Crutchfield customer from Longville, LA on 5/14/2018

Crutchfield Customer Review (What's this?)

Nice convenient size and well put together. Prefer slotted adjustment heads over Philips but pushes 10" sub well

Pros:

Cons:

Great amp

Chris from Cantonment, FL on 4/9/2018

Crutchfield Customer Review (What's this?)

Clarity of sound and ease of tuning make this amp easy to like!!!

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Cons:

Infinity Kappa K600

Kyle from Sergeant Bluff, IA on 4/4/2018

Crutchfield Customer Review (What's this?)

One of the best amps i have ever owned thanks crutchfield

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Infinity Kappa K600

Crutchfield customer from Bakersfield, CA on 3/31/2018

Crutchfield Customer Review (What's this?)

Perfect for the specific application I needed

Pros:

Cons:

Infinity Kappa K600

Dus from Pahoa, HI on 3/26/2018

Crutchfield Customer Review (What's this?)

Big power in a small package

Pros: Everything

Cons: N/A

Not great

Matt from Deer Park, NY on 3/22/2018

Crutchfield Customer Review (What's this?)

Not crazy about this amp. Power is great BUT you need small screw drivers to tighten the wires down. To gain access to the screws it's very hard to get the magnet cover off. You can not put a bass gain knob on this amp. Also it did not come 2006 certified. Thinking about returning. What a hassle. ??

Pros:

Cons:

No remote gain control

Anthony from WA on 2/26/2018

Crutchfield Customer Review (What's this?)

Looks nice. I like the magnetic cover abd the small size of the amp. I really hate that there isn't a way to add a remote gain control. My last amp has a knob that i mounted below the steering wheel/dash area for quick gain adjustments. I will be reinstalling my old cheap amp

Pros: Looks nice

Cons: No remote gain controls

Solid amp.

Steve from Saxton, PA on 2/22/2018

Crutchfield Customer Review (What's this?)

Right out of the box I noticed this amp is built like a tank. Very heavy for its size. Hook up was easy. Swapped out an old Rockford that kept overheating on me. This is my first mono amp purchase. This thing hits hard. I'm only running it into 4 ohms on a 10" sub and it works great. Come warmer weather we'll see how it handles the heat. So far I love it. Thanks Crutchfield.

Pros: Seems to have lots of headroom and build to take a pounding.

Cons: No remote bass boost.

Infinity Kappa K600

Crutchfield customer from Clarksville, TN on 2/9/2018

Crutchfield Customer Review (What's this?)

I put this amp under the front seat and it fit easily. Doesn't heat bad either under there even when running the amp for a long time. I really liked the set of the ports ease with which the held the wires. Overall I can say I really like this amp and it makes my subs sound great!

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Good product

Crutchfield customer from S Burlington, VT on 2/4/2018

Crutchfield Customer Review (What's this?)

Quality built product

Pros: Clean power

Cons: Non

Infinity sub amp

michael from Clanton, AL on 1/3/2018

Crutchfield Customer Review (What's this?)

Would have given it 5 stars but it has no remote bass boost. Other than that, this amp is awesome. Purchased it for my sons 10 inch sundown sub and it makes it pound. This is actually the second amp I purchased in two weeks from crutchfield and I bought two sets of the infinity 6.5's as well. The amps are clear and put out plenty of power. I will defiantly purchase more from crutchfield.

Pros: Clear, powerful and easy install. Nothing special needed

Cons: No bass knob. Don't let this keep you from buying though. Sounds great.

Exactly the kind of quality you should expect from the Kappa line!

Crutchfield customer from Riverside, CA on 10/3/2017

Crutchfield Customer Review (What's this?)

I almost want to give this amp a 4-star rating, but I can't in good conscience do that. The only thing I don't like about it is that there is no remote for gain control. I listen to Pandora on a shuffle with lots of different styles of music, and some songs have a lot more low end than others. So I really find having a little knob to adjust the gain in a matter of a second or two to be very beneficial. With this amp, I guess you are expected to set it once, and hope for the best, or adjust the subwoofer volume on you head unit, assuming yours has that option. I got around this issue by using the external active crossover I already had installed, which has a remote that can adjust the gain and the Q of a subwoofer that's plugged in to it. Other than that, this amp is amazing, it produces a great clean sound that makes my Kappa 1000W sound amazing. It looks nice, its small, and the wire screws are hidden under a magnet panel, making everything look super clean from above. It has a subsonic filter to clean up the very low end, and a boost to push add a little extra kick if you are in to that kind of thing. And it has 2 speaker outs in case you don't have a Kappa subwoofer, and want to wire your dual voice coil sub in parallel to get the 600W RMS this thing pushes out to a 2 Ohm speaker. Of course, there is no use for that if you were smart and got yourself a Kappa sub that you can adjust the impedance of with a quick press of a button.

Pros: Clean look, great sound, small footprint. Easy to install, and user friendly design

Cons: No remote gain control

Infinity Kappa K600

Crutchfield customer from Cameron, NC on 9/24/2017

Crutchfield Customer Review (What's this?)

This amp is perfect for my set up and a great price. The flocks at Crutchfield paired this with the rest of my system perfectly.

Pros:

Cons:

This amp produces the POWER!!!

Miguel from Select State on 9/18/2017

Crutchfield Customer Review (What's this?)

My Crutchfield sales team member did an awesome job pairing the Infinity Kappa K600 for my JL Audio W6v3 10" subwoofer. He also advised me to purchase the heavier gauge amp wiring kit which was great. I am very happy with my selection.

Pros:

Cons:

Infinity K600 Upgrade to an Engineer's Daily Driver

Jon from Rockford, MI on 7/18/2017

Crutchfield Customer Review (What's this?)

I professionally installed car audio and electronics for five years, and then took a 15 year break for college and a career. Now getting back into it, after too long of a break, I couldn't be happier with the K600 amplifier paired with a 10" Kappa 1000W subwoofer running at 2 ohm. The amp is very well designed and very high quality. I especially like the small details like the direct wire connections secured under a magnetic trim panel to clean up the install, the dB level meter is also an added bonus. Overall my installation in a 2013 Ford Fusion went well, after working directly with JT at Crutchfield we realized that the speaker inputs in the Fusion were resting at 6.5 VDC which was enough to trick the amp into thinking it had a remote signal when the vehicle was off, but a Line Out Converter solved the issue. My only recommendation for this amp would be to test the resting voltage of your speaker outputs when your vehicle is shut down, otherwise plan ahead to use a line level converter. Adjustments, tuning, low-power consumption and low-heat generation are all benefits of this awesome product from Infinity.

Pros: Easy installation. Low energy consumption. Clean install. Magnetic trim panel. Very high quality.

Cons: Line output converter needed for speakers resting at 6.5 VDC.

Details

Hands-on research

Product Research

Features

Overview: The Infinity Kappa K600 is part of the Kappa series of high-performance amplifiers. This Class D mono subwoofer amplifier will accept both high-level and low-level inputs. Class D amplifiers are highly efficient and compact, generating a lot of power without drawing much current or generating heat. The amp comes with spare fuses, speaker wire-to-RCA adapters, and mounting hardware.

Power Output: The Kappa K600 delivers the following power output:

  • 380 watts x 1 at 4 ohms (<0.1% THD+N)
  • 600 watts x 1 at 2 ohms (<0.1% THD+N)

Protection Circuitry: The amplifier features protection circuitry for thermal overload, over- or under-voltage (<9V or >16V), and short circuits. The LED on the top of the amp glows red if the amp goes into protection mode.

Controls: The Kappa K600's controls are located on one side of the amplifier. The rotary controls require a small screwdriver (not included) to make adjustments. The amp controls include:

  • Gain: The rotary gain control let you match the amp's input sensitivity to the output of the source unit. The input sensitivity range of the amplifier is 0.2V and up for a low-level input, and up to 20V for speaker-level input.
  • Input Level: The Input Level switch lets you select the type of input you are using. For high-level input, there are two settings: Hi1 and Hi2. If the audio system fails to play with an amplifier connected to its output, or you get a "speaker disconnected" message on your factory stereo, set the switch to the Hi2 position. The Hi2 position includes a circuit design to fool this type of factory system into "seeing" a speaker connected to its output.
  • Crossover: The amp features a non-defeatable low-pass filter that determines the upper limit of the frequencies that are sent to the subwoofer. You can adjust the cutoff frequency of the low-pass filter from 32Hz to 320Hz using the rotary control.
  • Bass Boost: The Kappa K600 has a variable 0-12dB bass boost, centered at 45Hz. This allows you to dial in the amount of bass according to your personal taste.
  • Subsonic Filter: The amplifier has a subsonic filter that eliminates super-low frequencies that rob amplifier power and can damage speakers. This high-pass filter is variable from 10Hz to 80Hz, and has a 12dB/octave slope.
  • Phase Switch: The amp has a 2-way Phase Switch that lets you invert the phase of the speaker output by 180°. When the subwoofer is out of phase with the other speakers in the vehicle, sound waves cancel each other and the bass response suffers. If the bass response is poor, inverting the phase of the subwoofer may improve it.

Connections: The Infinity Kappa K600 uses set screw terminals for the +12V power, ground, turn-on (remote) lead, and speaker outputs. The screws can be tightened/loosened with a Phillips-head or flat-head screwdriver (not provided). The amp connections include:

  • Power/Ground: The +12V Power and Ground terminals will accept up to 4-gauge wire. It is recommended that you use a minimum of 4 AWG power wire to the battery, with an in-line 70A fuse installed no more than 18" from the battery terminal. A 4 AWG ground wire (minimum) is also recommended, and attached to a metal area close to the amplifier.
  • Remote Turn-On: The Remote screw terminal will accept up to 8 AWG wire. Typically, an 18 AWG turn-on lead is included in an amplifier wiring kit.
  • Speaker Outputs: The amp features screw terminals for connecting two speakers. The terminals are wired internally in parallel. The amp's minimum speaker impedance is 2 ohms, so you can connect one or two 4-ohm subwoofers, a 2-ohm subwoofer, or one subwoofer with dual 4-ohm voice coils.
  • Speaker-Level Input: The amp includes two bare wire-to-RCA adapters for connecting the amp to a factory radio or aftermarket head unit without preamp outputs. You should attach the left and right speaker wires from the head unit to each adapter and plug the adapter's RCA plug into the amp.
  • Line-Level Inputs: The amplifier is equipped with one pair of RCA inputs for connecting stereo RCA patch cables from the head unit to the amp. If your source unit only has one subwoofer output, a "Y" adapter should be used to split the mono signal into two outputs.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

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Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

It was recommend be crutchfield to power my subwoofer Jl audio 12w6. [ DANIEL  Mar 19, 2019 ]
Good price. Affordable quality. [ Alex  Mar 04, 2019 ]
It was on sale and made by Harman. [ Conner  Mar 01, 2019 ]
Choose this unit based on price and excellent reviews and of course the Infinity Kappa name of great quality items. [ Mervyn  Feb 24, 2019 ]
Amp was marked down cheap. [ C  Feb 17, 2019 ]
good reviews [ JOSE  Feb 16, 2019 ]
Great price for exactly what I needed. [ Bridger  Feb 15, 2019 ]
I've been a lifer for the Infinity Kappa line since I was able to drive. Only one of the products failed but they had fantastic customer service that it made me stay. [ Jeremy  Feb 12, 2019 ]
Great sale price for the amount of watts. Distortion way below +/-1%. Frequency response goes below 20Hz. Subsonic filter. It checks all the boxes and would have been worth paying full price. [ Christopher  Feb 12, 2019 ]
Insanely amazing amplifier for an insane and unbeatable price! I love Crutchfield but have been buying on Amazon as Crutchfield has not been able to keep up from a price standpoint. I wish I could be more loyal but we all have to be careful with our cash. Please keep doing your best to match or beat Amazon where you can and I'll always be back because I love you guys and the support is unbeatable! [ ANTHONY R  Jan 18, 2019 ]
The Kappa K600 provides a good amount of power to add a sub to my 4-speaker system, and it has built in features that would cost more to buy separately! [ Ryan  Jan 09, 2019 ]
infinity makes premium under rated audio. db meter is a plus for keeping track of amp output. [ jared  Dec 16, 2018 ]
Friend recommended [ Carolyn  Nov 27, 2018 ]
Crutchfield's online expert suggested it for my sub. [ chris  Nov 27, 2018 ]
Small size [ Alex  Nov 02, 2018 ]
Class D amp for such a good deal, couldnt pass it up. [ Daniel  Sep 18, 2018 ]
Friend told me to [ DANIAL  Sep 07, 2018 ]
Really good price, great reviews, and will complete my all infinity sound system. [ Travis  Aug 18, 2018 ]
recommended by one of your chat helpers [ rick  Aug 13, 2018 ]
This amp was the best deal for 600 Watts. I saved 250.00! [ Bradson  Aug 13, 2018 ]
I love the small form-factor! The size of this amp is very similar to Infinity's 4-channel Kappa K4. About half the size of a laptop, and about as thick as a good book. You can fit 2 of these side-by side under nearly any car seat and still have a forearm's width to spare. [ Jeremy  Aug 07, 2018 ]
What a great deal on an incredible amp...received my first one last week and came back for another to install in the wife's vehicle. [ Kevin  Jul 13, 2018 ]
Price [ Kevin  Jul 06, 2018 ]
it's Harmon Kardon designed, and it's $0.25 per watt, can't beat that [ Emad  Jul 02, 2018 ]
I bought a kappa 4 a few years ago from Crutchfield it's great [ Brian  Jun 25, 2018 ]
Price was right. Good reviews... Oliver was very helpful. [ LYNN  Jun 07, 2018 ]
Price [ Raenell  May 30, 2018 ]
Value [ eric  May 23, 2018 ]
Quality and power output for the price is great. Design is sleek and looks great too. [ KEVIN  Apr 18, 2018 ]
I gave the technician on the phone, all my info on my sound system and this amp is what he suggested would sound the best with what i have. Ive blindly trusted these guys time and time again and have never been steered wrong. Plus it was the best amp for the money i wanted to spend and it happened to be on sale. [ Brian  Mar 30, 2018 ]
It was what I needed to fit my system and vehicle. [ MICHAEL  Mar 25, 2018 ]
Did some research based off of what I learned after talking to Maverick. I was able to make an educated decision about what I needed entirely after speaking with him. Could not be happier with what I learned from him. Fantastic guy, and I can't wait to receive these products. [ Scott  Mar 17, 2018 ]
Good reviews [ Arthur  Mar 11, 2018 ]
Perfect amp as far as power rating and also brand matching to compliment the Kappa 1200W [ Mike  Feb 16, 2018 ]
Good quality amp and a great price. Exactly what I needed. [ STEVEN  Feb 04, 2018 ]
On sale and infinity reputation [ M  Jan 31, 2018 ]
I like that this amp will allow me to have many different configurations from my 600 watt 12" to a couple 300 watt focal flax 10s [ David joel  Jan 18, 2018 ]
I needed to power my two 10" subs [ David  Jan 13, 2018 ]
Needed more power than the 200 watts I had from the old 5 channel amp to drive the Kappa 10" [ MARCCUS B  Jan 02, 2018 ]
I have two 300 watt rms subs at 4 ohm which total 600 watts rms at 2 ohm if paralleled. The mono amp is internally paralleled so no special wiring is needed externally. I'll just hook up both subs directly to the amp. Sadly it doesn't sync with the K4 controller so I will not install that with my K4. [ Bradley  Dec 18, 2017 ]
Previous experience with infinity [ Beanie  Nov 22, 2017 ]
Quality, best specifications, price and suited my stereo build specifications. [ James  Mar 12, 2017 ]

6 questions already asked

Yup [ Joseph  Mar 17, 2019 ]
Yes you can. Look at owners manual to see how to wire. [ Mark  Mar 17, 2019 ]
Yes, as long as you wire them together in series or parallel and keep the ohms at 2 or 4 [ STEVEN  Mar 17, 2019 ]
Depends what subs your looking at. I have it going to a single 10 alpine type r and it's just doing that [ MATTHEW J  Mar 17, 2019 ]
That's way over the top .if you're running under 10 feet of wire use 6-gauge if you're going to run longer than 10' drop it down to 4 gauge [ SHAWN P  Mar 13, 2019 ]
Pretty sure u can [ Paul  Mar 13, 2019 ]
No this amp isn't 1ohm. Stable your burn up the unit. Enter [ SHAWN P  Nov 18, 2018 ]
No, the amp is only 2 ohm stable. It will burn up the speakers [ SCOTT  Nov 18, 2018 ]
Crutchfield tech support can answer that for you in 2 seconds. They're pretty good. Give them a call. I have not a clue [ nicholas  Nov 18, 2018 ]
What are the settings on the infinity amp set at? What ohm are you running? And what gauge wire? I recommend 4 gauge power and ground and at least 12 if not 10 gauge for the sub. [ David joel  Aug 01, 2018 ]
I'm running my 10" JL W6v3 (600W RMS) with this amp, and it has more than enough power to drive my sub harder than I ever care to run it. [ David  Jul 31, 2018 ]
Assuming the ohms match up, the power delivery should be sufficient. However, I do feel my older infinity 1600a hit harder... depends on your preference of "thump". But I have kids in the car now, so the deep bass isn't necessary anymore. [ Jonathan  Jul 31, 2018 ]
I have it bridged and turned up 75%. It pushes a normal 300 watt sub without issues. I think it would be under power for a 400 RMS especially if it is a long throw or sealed box. Hope that helps [ Eric  Jul 31, 2018 ]
Hi, is your sub 400w rms at 4 or 2ohm? If its 4ohm, you are kinda of under powering and over working your amp. Im not a pro, just my .02 cents. [ Mathew  Jul 31, 2018 ]
Hi, Make sure your gains are properly set. I replaced a more powerful amp with my infinity and it sounds fine. Hope this helps. [ STEVEN  Jul 31, 2018 ]
I won't be back at the car for three weeks but I'm about 80 percent sure it doesn't have the phone jack for a volume non to be added. If you look at amps 99% of them will have a phone jack if it can be controlled. Most are going away from it because you can increase the gain from newer radios. Hope that helps [ Eric  May 08, 2018 ]
Out of the box, no, there is no port for a remote connection. I got around this fairly easily though. I already had a preamp crossover that has a bass remote and I use it instead of my amps crossovers. You don't want to use the crossovers on the amp if you do this, as chaining crossovers can have adverse effects on the resulting sound. But having a standalone crossover is much better in my opinion, assuming you have/get a good one. [ Louis  May 07, 2018 ]
That is correct. [ Robert  May 07, 2018 ]
If you look in the specifications it has noise rejection differential inputs which help with any noise that may be carried over with balanced or unbalanced input signals.these inputs are only found on higher quality amps like infinity, other amps may not have this due to cost. Infinity is truly a very high quality amp at a great value! Compare specs.apples to apples and infinity will be at the top almost every time. [ James  Jan 04, 2018 ]
the primary objective in using balanced audio is to reduce noise. This noise is picked up by mutual inductance and capacitance with other stuff (frequently: mains wiring) near the audio signal. If the mutual inductance or capacitance to this noise source is equal for our two conductors, then equal voltages and currents will be induced on each conductor. That is, their difference will not change. Thus the noise source, from the perspective of our differential amplifier which only looks at this difference, doesn't exist. [ James  Jan 03, 2018 ]
Everthing I have read and from what I can actually see tells me no. Unless there is such a thing as a balanced rca and the unit has a converter built in it. I have never heard of or read in the manual such a thing. I wouldn't know on balance, but you'll probably need to convert the signal into an unbalanced rca. Curious to know what your source is? Also, balanced is just the same sgnal frequency reversed. Both the forward and reverse are transmitted so that way any extra signal bleed over onto the line can be distinguished from the original signal and filtered out. If you convert the signal before the amp then a foot or two of quality rca cable would be incredibly unlikely to pick up any new noise so the audio would remain I suspect exceptional. I work in an industry where I run signals down lines and deal with bleed over, magnetic fields, line noise, etc... It's kind of funny reading forums & the complete disregard some people place on rca shielding or the over others who worship it. RCA's Don't run them near heavy power sources or electric motors, get foil sheathed as it supposedly absorbs stray noise well to keep it off the copper signal line & add copper sheathed if you like over kill, heavy wire insulation is nice, gold tip ends as other metals can create noise not that you would hear it most likely, and don't waste money on overpriced china made wire. If you ground every device well since you'll have run balanced 90% of the way you shouldn't have any problems. Check the manual but the amp takes rca and I believe it specifies at what voltage. 4 & 5 from any source should be fine. Im no sound expert and could always be wrong but I have the amp and have done a lot of reading as I like a good clean sound. [ Bradley  Jan 03, 2018 ]
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