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Rockford Fosgate R2SD4-10

Prime R2 Series 10" shallow subwoofer with dual 4-ohm voice coils

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  • Rockford Fosgate R2SD4-10

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  • Rockford Fosgate R2SD4-10

  • Rockford Fosgate R2SD4-10

  • Rockford Fosgate R2SD4-10

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Our take on the Rockford Fosgate R2SD4-10

by Jo Greene
Rockford Fosgate

What's a component sub and why would I want one?

A component sub is simply a speaker that's designed to reproduce bass once it's installed in a compatible enclosure. Think about the impact of a movie soundtrack in a big theater or even in your own home HDTV setup. A component sub can add the same kind of power to the music in your car. And a car sub is not all about the boom that you hear on a street corner (although that's cool too) - you can pair a component sub with your choice of enclosure to get bass just the way you like it, from tight and punchy to fat and loose. And once you experience music in your car with a well-tuned subwoofer, you'll never go back.

Rockford Fosgate's Prime R2 shallow-mount subs deliver satisfying bass even in smaller cars where space is tight. A special elevated motor structure lets these low-profile subs work in extremely compact enclosures, while still handling plenty of power.

The R2SD4-10 sub features a 10" mica-injected polypropylene cone that works with a high-density poly-foam surround to punch out fat, deep notes. This shallow-mount workhorse will handle up to 200 watts RMS, with a mounting depth of only 3-1/2". Rockford Fosgate stitches the tinsel leads that carry the signal to the voice coils directly into the cone, so they'll hang tough through heavy use. The stamped solid-steel frame offers the same venting found in standard-mount Rockford Fosgate subs to keep this sub running cool.

Dual 4-ohm voice coils allow you to wire this sub for 2- or 8-ohm impedance, giving you more flexibility in setting up your system. Rockford Fosgate optimizes this Prime sub for both sealed and ported enclosures so you can choose the type of bass you want in your ride.

Highlights:

  • 10" shallow-mount subwoofer with dual 4-ohm voice coils
  • mica-injected polypropylene woofer cone with poly-foam surround
  • stamped solid-steel frame
  • power range: 100-200 watts RMS (400 watts peak power)
  • frequency response: 45-250 Hz
  • sensitivity: 82 dB
  • top-mount depth: 3-7/16"
  • sealed box volume: 0.7 cubic feet
  • ported box volume: 1.4 cubic feet
  • warranty: 1 year
  • Our 60-day money-back guarantee
 

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
Size
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10 -inch
Impedance
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4 ohms
Cone Material
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Mica injected Poly
Surround Material
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Poly-Foam
Ideal Sealed Box Volume (cubic feet)
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0.7
Ideal Ported Box Volume (cubic feet)
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1.4
Port diameter (inches)
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4
Port length (inches)
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13.7
Free-Air
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No
Dual Voice Coil
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Yes
Sensitivity
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83 dB at 1 watt
Frequency Response
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38 - 250 Hz
RMS Power Range (Watts)
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100-200
Peak Power Handling (Watts)
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400
Top Mount Depth (inches)
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3 7/16
Bottom Mount Depth (inches)
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N/A
Cutout Diameter or Length (inches)
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9 1/16
Vas (liters)
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21.7
Fs (Hz)
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38.1
Qts
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0.73
Xmax (millimeters)
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8
Parts Warranty
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1 Year
Labor Warranty
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1 Year
Product Research
What's in the box?

Download owner's manual

  • One shallow-mount 10" Dual 4-ohm voice coil woofer
  • Eight 1-1/8" Self-tapping screws
  • 4mm Allen bit
  • Installation and Operation manual (English/ French/ Spanish/ German)

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.

Features

Shallow Mount Design: The Rockford Fosgate Prime R2 Shallow Subwoofer is designed and engineered with a much smaller motor assembly which reduces the overall depth of the woofer allowing it to fit in shallower enclosures and tighter locations of your vehicle.

Dual 4-ohm Voice Coils: This woofer features dual 4-ohm voice coils to offer wiring flexibility. When the voice coils are wired in parallel the woofer presents a 2-ohm load, when wired in series it presents an 8-ohm load.

Spring Post Assembly: The woofer features compression input terminals with attached 16-gauge stitched tinsel lead wires. The nickel plated spring posts will accept pin connectors, single banana plugs, and bare wire up to 12-gauge.

Sealed Box Volume: Rockford Fosgate recommends a sealed enclosure with an optimum internal volume of 0.7 cubic feet (from 0.5 to 0.75 cubic feet is acceptable). Sealed enclosures provide the most control over a woofer, will handle a lot of power, and provide accurate sonic reproduction, making them suitable to all types of music.

Vented Box Volume: Rockford Fosgate recommends a vented enclosure with an internal volume of 1.4 cubic feet using a 4" diameter x 13.7" long port tube; this yields a tuning frequency of 42 Hz. Ported (or vented) enclosures typically provide better overall efficiency than sealed so they are suitable for use with smaller amplifiers, giving you more bass output from less power. However, this efficiency comes at the expense of very low frequency output (below 35 Hz).

 
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Rockford Fosgate R2SD4-10 Reviews

Average Customer Review:

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5 out of 5

Good and clean

Written By Focusforlife, Mentor, OH on Saturday, February 23, 2013
 
I've got this sub hooked up at 2 ohms to a Punch 300 in an super cab truck.(a little overkill for this sub, gain is only a third of the way up) It sounds very clean and not over powering. The HU is a pioneer avh4500 and helps balance everything out. Especially with 400 watts RMS easily making the super pop.
Pros:
Fits perfect under the seat of my super cab truck, covers the lows really well and precise.
Cons:
Easy to make pop with 400 watts RMS. Not really the subs fault.
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4 out of 5

Great Sub!

Written By interscope8, West Lafayette IN on Tuesday, December 04, 2012
 
Awesome subs, had two of these in my Explorer Sport Trac, and they gave a definate improvement over stock bass. I was running a 770w JBL amp and these subs made hip hop and rap sound a lot better. Was great for rock too. But long bass notes like in dubstep or EDM made the subs pop and stop until bass levels were slow again.
Pros:
Cheap, look very nice, very slim, punchy bass
Cons:
Don't handle long bass notes well
1 out of 1 people found this helpful
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5 out of 5

Very nice

Written By Dave, Orange, Tx on Sunday, September 30, 2012
Crutchfield Customer Review (What's this?)
 
Replaced my Bass Link II with this low profile sub and a Pioneer low profile box so it would fit in the storage area behind the back seat of my Tacoma. Was a little worried at first. Have bridged but was getting only decent bass. A few days later and I had to back it down. WOW. Not disappointed in the least. Love it.
Pros:
Low profile for tight areas and clean tight bass.
Cons:
None that I can find.
1 out of 1 people found this helpful
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5 out of 5

Nice replacement for my stock woofer.

Written By The Fly, Richmond, Va on Thursday, August 02, 2012
Crutchfield Customer Review (What's this?)
 
I was skeptical about what type of system I wanted to put in my 2007 Honda Pilot. I replaced my stock speakers with Alpine 610's and 610 components. I caught the flu bug, had to do more!!!!! The stock head unit was not putting out enough power but the speakers sounded great. I ended up buying the Alpine hd137bt and wow that made a whole world of difference powering the new speakers. I lost the stock subwoofer but gained clarity and some nice bass. I still wanted more. I was pondering on replacing it going all Alpine E sub, but found I only had so much space behind the speaker. I only had about 4 to 4.5 inches inches top mounting the subwoofer and needed a nice replacement. I did not want to make a spacer so I bought this sub. I hooked it up day using the Rockford Fosgate 250 1 d. I highly recommend this amp for under the passenger front seat, it is a big punch in a small package especially for one sub. I tested it out today and boy did it come alive! I have not tuned the sub and amp yet but puts out way more clean tight bass then I ever thought it would. So if you have a 2007 Honda pilot and want to do a make over this is a great sub to just plug and play. (I had to mark and pre-drill holes for a nice flush fit.) I also put some poly fill behind the sub as well filling up the areas behind the sub all around the open cavity about 9 oz or so. I used the RockfordFosgate 8 gauge amp kit and hid my wires under the carpet for a nice clean install. I'm happy now !
Pros:
I am amazed at this shallow subs performance. I used to have to Kicker 8 inch Comps in a band pass box with an alpine and those hit hard, but this sub is more than I could have imagained.
Cons:
None yet!
4 out of 4 people found this helpful
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5 out of 5

SURPRISED BASS

Written By BIG BASS SURPRISE, BIRMINGHAM,AL on Wednesday, May 23, 2012
Crutchfield Customer Review (What's this?)
 
WELL ,YES I WAS VERY SURPRISED AT THE POWER & HOW DEEP THE BASS WAS- IN THIS SMALL SHALLOW BOX (SEALED) OF COURSE ?I HAD EARLIER THE ROCKFORD P2D410----------THIS SHALLOW BASS IS DEEPER--??WOWWWWW-THIS SUB WENT INTO MY TRIKE TRUNK-MOTORCYCLE-TRIKE !!! SWEET !!!!!!!!!!!!!!!! SO GO GET ONE-------------------LARRY
Pros:
DEEP BASS IN A SHALLOW SUB & BOX------------
Cons:
??????????????????????????? NON RIGHT NOW ????????????
2 out of 2 people found this helpful
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1 question already asked

can this be used in a c6 corvette front door? [ terry  Dec 06, 2013 ]
1 answer
  • This would need to be a custom install, so we don't have exact fit information. However, if you would like to contact and Advisor by phone or chat they may be able to pull up your vehicle and determine the mounting depth available. [ Jeff Staff  Dec 06, 2013 ]

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