Visonik's XT Series amplifiers provide the tools you need to bump up the sound in your car. From their distinctive styling to their full range of signal-shaping controls, they'll satisfy your desire for great looks and great sound.

The V318XT mono subwoofer amplifier delivers up to 800 watts, with speaker-level inputs for easy hookup to a factory system and a preamp output that makes it easier to add another subwoofer amp. The low-pass filter matches the amp's output to your subwoofer's requirements, while special transistors provide plenty of clean power. This amplifier provides a powerful punch from a relatively small package.

Product Highlights:

  • mono subwoofer car amplifier
  • 500 watts RMS x 1 at 4 ohms (800 watts x 1 at 2 ohms)
  • variable low-pass filter (50-250 Hz, 12 dB per octave)
  • subsonic filter (20-50 Hz)
  • MOSFET power supply and output stage
  • preamp input and output
  • fuse rating: 25A x 2
  • 8-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • 13-5/8"W x 2-9/16"H x 10-5/16"D
  • warranty: 2 years
  • Our 60-day money-back guarantee

My system has plenty of power. Who needs an amp?

You might think you don't need an amp because you have a 400-watt system in your car, or because your new stereo puts out 50 watts a channel. But those are peak wattage ratings, which may boil down to 15 or 20 watts per channel, using the more realistic RMS rating. An amp sends your speakers the power they need to deliver your music with clarity and impact, whether you're using factory speakers or high-performance components. And low-frequency reproduction requires lots of power, so an amp is an absolute must if you're adding a sub to your system.

Hands-on research

What's in the box?

Download owner's manual

  • V318XT Mono amp
  • Four 0.875" self-tapping screws
  • 4 Lock washers
  • 4 flat washers
  • 2 Spare 25 Amp fuses
  • 1mm/2.5mm/3mm Allen wrenches
  • Owner's Manual
  • Limited warranty card
  • Card from President of Visonik Inc.
  • Survey card
  • Technical service information contact sheet

Product Research

Features
Inputs and Outputs

Features

Overview: The Visonik V318XT is a mono high performance amplifier designed for powering  your bass thumping subwoofers and can deliver up to 500 watts x  channel at 4ohm or 800 watts x 1 channel at 2ohm.

Gain Adjustment: This control adjust the amplifier's input sensitivity to the output voltage of your receiver to provide distortion free sound.

Bass Boost Switch: By using the bass boost function, bass notes at 45 Hz are amplified in increments of 0-18dB.

Sub Sonic Filter: The amp features a sub sonic filter that cuts out frequencies below 20 to 50Hz to your speakers. These ultra-low frequencies that cannot be reproduced by some subwoofers do not become sound but can become unnecessary oscillations, which affect sound by causing distortion. By removing these frequencies you improve the reproduction performance of your subwoofers and eliminate possible harmful distortion.

Line Level Output: The amp has a set of stereo preamp outputs which allow you to send a signal to another amplifier, if desired.

Power/Speaker Terminals: This amp has set-screw terminals for power, ground, remote turn-on, and speakers. The power and ground terminals can accept up to 4-gauge wire. The remote turn-on connection can accept up to a 10-gauge wire and the speaker terminals can accept up to 8-gauge wire. Allen wrenches are supplied for tightening and loosening the set screws.

Crossover Control: You can adjust the crossover for your chosen application between Low Pass or Full mode.

  • LPF: Select the low pass filter when using the amplifier to power subwoofers.
  • Full: Select the Full mode when using the amplifier to power full range speakers that can handle full bandwidth.

Low-Pass Crossover Adjustment: The V318XT has an adjustable built-in 12dB/octave, 50-250Hz lowpass crossover. You will want to adjust this setting depending on the subwoofer or subwoofers you have chosen for your system when using this amp as a dedicated sub amp.

Power Indicator LED: This blue LED will illuminate when the amplifier is turned "ON" so you can easily tell if your amp is getting power.

Protection Circuits: The amplifier has protection circuits that will shut down the amp in case it becomes shorted, overloaded or overheated. The red "protection" LED will glow when the amp is in "protection" mode, and the amplifier will not be operable until the problem is corrected.

Note: This amplifier temporarily will shut down if it gets too hot, then restarts automatically once it cools.

Positive Battery Terminal: Due to power requirements of the Amplifier, this connection should be made directly to the positive terminal of the battery. An in-line fuse holder (not included) should be installed as close to the battery's positive terminal as possible.

Ground Terminal: To avoid unwanted ignition noise caused by ground loops, it is essential that the amplifier be grounded to a clean, bare metal surface of the vehicle's chassis.

Remote Turn-On Input: This connection allows the amplifier to turn "ON" remotely when the vehicle's head unit is turned "ON". Connect this input to the remote turn-on wire of your head unit.

Inputs and Outputs

Left Side of Amplifier:

  • Stereo RCA Input: This input is for the audio signal cable from the output of your receiver.
  • Stereo RCA Output This output allows you to send an audio signal to another amplifier.

Right Side of Amplifier:

  • Speaker: One pair of set screw terminals (will accept up to 8-gauge wire).
  • Fuses: Two 25-amp blade fuse.
  • +12V (Power): Set screw terminal (will accept up to 4-gauge wire).
  • Remote: Set screw terminal (will accept up to 10-gauge wire).
  • GND (Ground): Set screw terminal (will accept up to 4-gauge wire).

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 open the box, verify contents, 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.

Visonik V318XT Reviews

Average Customer Review:

2 reviews
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Visonik V318XT

Written By Phillip, Hartsville, SC on Sunday, August 06, 2006

Crutchfield Customer Review (What's this?)

I have this amp powering 2 Infinity Kappa perfect 10.1's. Its rated at 400 watts rms... But it does a pretty good job of powering my subs. I do believe it is a little over rated on the power specs though. It does what I need it to do, but if you plan on powering two subs, you might want to consider using 2 amps or going with a higher end amp. This amp is great for the price though, and if you arent looking to break your bank but still want a lot of bass, this is an excellent choice.

Great amp for only $179!

Written By Brad, Michigan on Monday, June 26, 2006

At first, I was pretty scared to buy a Visonik amp because I had never owned any Visonik products and I didn't know anybody who did, but I needed a cheap powerful amp. So, I figured that I would give the V318XT a try. All I can say about it is WOW. I had a Pioneer TS-W3004SPL in a poted box built to speck. The sub is rated at 1000W RMS, but this amp seemed like it was too much for it. After about three weeks of running it pretty hard the speaker blew. I couldn't belive it because the amp was supposed to be rated at 800W RMS. I thought maybe the amp was not enough for it. Well, I decided to read up on the amp a little more and I realized that I missed a very important section of the manual. The amp is actually rated at 1000W RMS, but my amp was tested at 1101W RMS. So, I decided to get a sub that could handle the power. So, I bought a Rockford Fosgate T212D4 15inch sub. Woa does that sub hit hard. I had a cutom enclosure made for it. The amp runs it perfect. I broke in the sub, which took about three weeks and then I really started abusing it. For about three months now, this amp has been pushing this sub and I have not had any problems. The great thing about the amp is the fact that is has so many different ways for you to "fine tune" the bass. Another awesome thing about the amp is that it only requires an 8 gauge kit. At first I was using an 8 gauge kit and I had no problems, but then my brother upgraded his system to a 4 gauge kit. He noticed a big difference, so I decided to upgrade. I didn't really notice much of a difference. So, if you think you have spent enough on the amp and sub, just get an 8 gauge kit.

Get everything you’ll need to enjoy your new Visonik V318XT

Bring the music from your amp to your speakers.
Patch cables take the music from your stereo to the amplifier. Most amp wiring kits don't include them.
Helps protect your car's charging system and improves power handling. Required power and ground wires not included with cap.
The right tools will make the installation easier.
Have your new amplifier put in by a qualified professional in your area.
T-Spec 12-gauge Speaker Wire

T-Spec 12-gauge Speaker Wire

Black/white jacket — priced per foot

Item #: 120SW12WB1

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EFX 2-Channel RCA Patch Cables

EFX 2-Channel RCA Patch Cables

Reference Series Multi-Core RCA patch cables — available in 5 different lengths (25-foot)

Item #: 142RR25

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T-Spec 2-Channel RCA Patch Cables

T-Spec 2-Channel RCA Patch Cables

Available in 7 different lengths (10-foot)

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T-Spec Capacitor

T-Spec Capacitor

1.5-farad capacitor with red LCD meter

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S&G Tool Aid 87650

S&G Tool Aid 87650

Door Trim and Panel Removal Tool

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Skewdriver Pro SPK4042

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Ratcheting straight and offset screwdriver set with 40 bits (Skewdriver Pro with ratchet handle, pictured)

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Metra Crimp Tool and Connectors

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Package contains crimp tool and over 150 pieces

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S&G Wire Cutter/Stripper Tool

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Cuts and strips 12- to 22-gauge wire

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Install Bay IB35400

Install Bay IB35400

Premium door panel and trim tool

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Install Bay 3320

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Auto-ranging digital multimeter

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InstallCard: Amp or Equalizer

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