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Rockford Fosgate T3-BMW-SUB

Power Series 8" replacement woofer for select BMW models

3 Reviews | 2 questions - 2 answers

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Overview

Our take on the Rockford Fosgate T3-BMW-SUB

Rockford Fosgate's known for their subwoofers, and now they've come up with a direct-fit replacement for your BMW's under-seat subwoofer. Whether you want better bass in your Beemer, or your original sub has gone to its great reward, this Power Series T3-BMW-SUB 8" sub will fit right in with a minimum of fuss, giving you a big boost in performance.

Bass for your BMW

Rockford Fosgate's known for their subwoofers, and now they've come up with a direct-fit replacement for your BMW's under-seat subwoofer. Whether you want better bass in your Beemer, or your original sub has gone to its great reward, this Power Series T3-BMW-SUB 8" sub will fit right in with a minimum of fuss, giving you a big boost in performance.

The Power T3-BMW-SUB speaker features a glass-fiber sandwich cone with a durable rubber surround, so it'll pump out great bass in your car for a long time. The package also includes a BMW connector so you don't have to cut any wires.  It's ready to install in place of the stock subwoofer, and it'll handle up to 150 watts RMS, so you can turn it up for some true Bavarian bass.

Product Highlights:

  • 8" 4-ohm thinline subwoofer
  • direct replacement for original BMW underseat subwoofer
  • glass fiber sandwich cone
  • nitrile butadiene rubber surround
  • power handling: 150 watts RMS (300 watts peak)
  • frequency response: 30-250 Hz
  • grille not included
  • warranty: 2 years
  • Our 60-day money-back guarantee

What's in the Box:

  • 1 Subwoofer
  • Installation/Operation manual (English/ French/ Spanish/ German/ Italian)

These subs are significantly more powerful than both the stock subs and the previous replacement subs I tried (Audio system AX 08 BMW 20 cm neodymium woofers for BMW). I have a 2008 3 series and am still running a JL XD600/6v1 amp that is still going strong after 10 years.

Charles, St. Louis, MO

Reviews

Rockford Fosgate T3-BMW-SUB Reviews

Average Customer Review(s):

(3 Reviews)

Huge bass upgrade

Charles from St. Louis, MO on 2/28/2018

2008 BMW 3 Series
Crutchfield Customer Review (What's this?)

These subs are significantly more powerful than both the stock subs and the previous replacement subs I tried (Audio system AX 08 BMW 20 cm neodymium woofers for BMW). I have a 2008 3 series and am still running a JL XD600/6v1 amp that is still going strong after 10 years.

Pros: Great sound Huge punch right below the seat for a 8" sub Install is incredibly easy and all of the screws line up nicely If you are going straight from stock, the wiring harness fits easily

Cons: The previous subs I used to replace the stock subs just had wire terminals so I had cut the harness off the stock wiring. The only issue I had was finding the old wire harnesses because there isn't a easy way to wire the subs without the specific harness. This obviously isn't a big deal though.

Rockford Fosgate T3-BMW-SUB

Crutchfield customer from Camarillo, CA on 4/23/2017

2009 BMW X5
Crutchfield Customer Review (What's this?)

Awesome powerful subs fit in the factory location under the seats in my E70. I use a JL600/1 amp with the Alpine PXA-H800 processor. These subs were recommended to me by You Tube channel "car audio etc."

Pros:

Cons:

Rockford Fosgate T3-BMW-SUB

tom from eugene oregon on 12/2/2016

2007 BMW 3 Series
Crutchfield Customer Review (What's this?)

These sound better than the stock subs, they hit harder and deeper and they don't hit and vibrate against the carpet and grille like my old speakers do, but if you want these subs to hit hard you need to upgrade your amp I have the JL XD600/6v2 and it's a night and day difference

Pros: Sounds and thumps awesome with amp upgrade

Cons: Sounds like stock subs with the stock amp

Details

Hands-on research

Features and Specs

General
Speaker Size Vehicle-specific
Design 1-way
Tweeter Design ---
Impedance (Ohms) 4
Tweeter Composition ---
Woofer Composition Glass Fiber/Paper
Woofer Surround Rubber
Parts Warranty 2 Years
Labor Warranty 2 Years
Specifications
Sensitivity (1W at 1 meter) 87.8
Sensitivity at 2.83 volts N/A
Frequency Response 30 - 0.25k Hz
Minimum RMS Wattage ---
Maximum RMS Wattage 150
Peak Power Handling (Watts) 300
Top-mount Depth (Inches) 1 3/16
Bottom-mount Depth (Inches) N/A
Cutout Diameter or Length (inches) 7 9/16

Product Research

Features

Mounting: The T3-BMW-SUB fits as a direct replacement for the factory under-seat subwoofers in select BMW 1 Series, 3 Series, and X1 models. T3-BMW-SUBs are packaged individually, so you will need to purchase two.

Wiring: The BMW factory wiring harness plugs directly into the T3-BMW-SUB frame.

Magnets: The T3-BMW-SUB subwoofer uses a neodymium magnet to minimize size without giving up magnetic field strength.

Klippel Verified: The Klippel distortion analyzer, a device that uses a laser and sophisticated software to do large-scale analysis of drivers in motion, lets Rockford Fosgate optimize the speaker's motor structure, voice coil alignment, and suspension to yield the best possible performance.

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 seems that this product will fit my BMW 428i xdrive Grand Coupe. If it doesn't I will return it. Crutchfield has always done right by me and also stands behind their product. [ M  Aug 30, 2018 ]
Google [ Calvin  Dec 29, 2017 ]

2 questions already asked

RF T3-BMW-SUBs Are Sold Separately. [ Lorenzo  Sep 19, 2018 ]
For details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle. [ Krissy  Nov 03, 2015 ]  Staff
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