Boston Acoustics takes much of the technology they developed for their top-of-the-line GT Reference amps, and uses it in their latest GTA Series amplifiers. The GTA-1000m mono amplifier puts out up to 1,000 watts RMS to your subwoofer system — more than enough power to get your bass rockin'. Boston Acoustics' Q-Tune™ technology lets you tune your bass so you get maximum performance from your sub/enclosure combination. The inputs feature special noise-cancellation circuitry that ensures clean reproduction of your music all the way through to your speakers.

The GTA-1000m's compact size allows it to fit in more vehicles, while the Integral Mounting System puts the mounting holes in each corner of the frame, instead of using protruding tabs that waste space. You'll find all connections and adjustment controls located on one side of the amp, for a neat installation and easy adjustment. Variable low-pass and subsonic filters let you tune the amplified signal so your system can sound its best. An optional wired remote control gives you the power to tweak the bass level from the front seat.

Product Highlights:

  • mono subwoofer amplifier
  • 600 watts RMS x 1 at 4 ohms (1,000 watts RMS x 1 at 2 ohms)
  • CEA-2006 compliant
  • variable low-pass filter (50-150 Hz, 12 dB/octave)
  • variable subsonic filter (10-50 Hz)
  • Q-Tune technology variable bass boost
  • optional wired remote subwoofer level control
  • Symmetrical Signal Technology (SST™) uses asymmetrical balanced inputs for noise cancellation
  • frequency response: 10-150 Hz
  • preamp and speaker-level inputs
  • fuse rating: 35A x 3
  • 4-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • 12-9/16"W x 2-3/8"H x 8-5/16"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

  • Mono amplifier
  • Six 35-amp ATO fuses (3 installed/3 extra)
  • 12" Speaker-level input harness
  • Four 3/4" Self-tapping screws
  • 4mm Alen wrench
  • 3mm Alen wrench
  • Owner's manual (English)
  • Owner's manual (Spanish/ French)
  • Warranty information

Product Research



2Ω Stable: The GTA-1000M is 2Ω stable; the lower impedance offers higher output power:

  • 600 watts x 1 @ 4 Ω
  • 1000 watts x 1 @ 2 Ω

Controls and Terminals: All the controls and terminals are conveniently mounted on one side of the amp.


Gain: Adjust the input sensitivity with this rotary control; the range is 0.2 Volts to 5.0 Volts for line-level and 0.4 Volts to 10.0 Volts for speaker-level.

Crossover Frequency: The low-pass crossover is always engaged, with a crossover point continuously variable from 50 Hz to 150 Hz; the slope is 12 dB/octave.

Subsonic Filter: The subsonic (high-pass) filter is always on and is continuously variable from 10 Hz to 50 Hz; the slope is 12 dB/octave.

Q-Tune: Once the subsonic crossover point has been set, use the rotary Q-Tune control to increase the bass information centered around the crossover point.


Speaker-level Input: Use the included speaker-level input harness when the receiver has no RCA outputs.

Line-level Input: Left and right RCA jacks for the input signal from the head unit.

GTA-RSL: RJ-14 port; connect an optional GTA-RSL remote level control (item number 065GTARSL, sold separately).

Speaker Output: One pair of set-screw terminals is provided for connecting the subwoofer; the terminals accept up to 8-gauge wire; the set screws are tightened/loosened with the supplied 3mm Allen wrench.

ATO Fuses: Three 35-amp ATO-type fuses are located between the speaker and power terminals.

Power/Remote: Three set-screw terminals for connecting power, ground, and remote wires; the power and ground terminals accept up to 4-gauge wire (4-gauge recommended) and the remote terminal accepts up to 8-gauge wire; the set screws are tightened/loosened with the supplied 4mm and 3mm Allen wrenches.

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.

Boston Acoustics GTA-1000M Reviews

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Boston amp GTA-1000M

Written By Tom, Tampa FL on Friday, March 09, 2012

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

Installed in my 1500 HD GMC running 4 - 8 inch subs 4 ohm load . Deep rich bass with no distortion . At higher volumes with the gain slightly above half , it shakes the sleeves on my shirt . Advisor sent me the wiring diagram I needed for the four ohm load as well as suggesting this amp. If I had to do it all over again , I would do it exactly the same .

Pros: Plenty of power for my application . Easy to install . Customer support was fantasitc .

Cons: None

Product reviews from the Crutchfield Labs

Boston Acoustics — a sound decision

When the offer came through to "audition" some new Boston Acoustics gear in my car ... well, I just couldn't refuse. After all, it'd been an awfully long time since my last upgrade, and I was eager...

What are the Labs?

Get everything you’ll need to enjoy your new Boston Acoustics GTA-1000M

You'll need an amp wiring kit to install your new amplifier, as wiring is not included.
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 4PK Installation Kit

T-Spec 4PK Installation Kit

4-gauge amplifier wiring kit — includes speaker wire

Item #: 1204PK


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Rockford Fosgate RFK4X

Rockford Fosgate RFK4X

Complete 4-gauge amplifier wiring kit
Includes patch cable and speaker wire

Item #: 575RFK4X


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Rockford Fosgate RFK4

Rockford Fosgate RFK4

4-gauge amplifier power wiring kit

Item #: 575RFK4


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EFX PA4BX Wiring Kit

EFX PA4BX Wiring Kit

4-gauge amplifier wiring kit — includes 2-channel patch cable

Item #: 142PA4BX


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T-Spec 12-gauge Speaker Wire

T-Spec 12-gauge Speaker Wire

Black/white jacket — priced per foot

Item #: 120SW12WB1


T-Spec 16-gauge Speaker Wire

T-Spec 16-gauge Speaker Wire

Black/white jacket — priced per foot

Item #: 120SW16WB1


Stinger PRO Series Speaker Wire

Stinger PRO Series Speaker Wire

Priced per foot (16 Gauge)

Item #: 541SPW516B


T-Spec 2-Channel RCA Patch Cables

T-Spec 2-Channel RCA Patch Cables

Available in 7 different lengths (17-foot)

Item #: 120RCA172


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T-Spec Capacitor

T-Spec Capacitor

1.5-farad capacitor with red LCD meter

Item #: 12015DDC


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Bojo Trim Panel Tools

Bojo Trim Panel Tools

Set of 6 pry tools — helps remove interior and exterior trim and door panels

Item #: 126CR6NGL


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Pro.Fit Wire Worm

Pro.Fit Wire Worm

Installation tool helps route wiring through tight spaces

Item #: 042DM4533


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Bojo Trim Panel Tools

Bojo Trim Panel Tools

Set of 6 pry tools — helps remove interior and exterior trim and door panels

Item #: 126CR6LNGL


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InstallCard: Amp or Equalizer

InstallCard: Amp or Equalizer

Prepaid professional amplifier or EQ installation

Item #: 597421003


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