Boston Acoustics GTA-802

2-channel car amplifier — 80 watts RMS x 2

  • Boston Acoustics GTA-802


  • Boston Acoustics GTA-802


  • Boston Acoustics GTA-802

  • Boston Acoustics GTA-802

  • Boston Acoustics GTA-802

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Item #: 065GTA802

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Our take on the Boston Acoustics GTA-802

by Buck Pomerantz
Boston Acoustics

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.

Boston Acoustics GTA amplifiers use some of the same technologies found in their top-of-the-line GT Reference amps to give your music a powerful boost. And these attractive amps deliver the sonic goods at a reasonable price.

The 2-channel GTA-802 amplifier puts out 80 watts RMS per channel — plenty enough power to rock a set of speakers or components — or you can drive a 4-ohm sub with 260 watts RMS in single-channel mode. Boston Acoustics' Q-Tune™ technology lets you bump up your bass, whether you're running a subwoofer or not. The inputs feature special noise-cancellation circuitry that ensures clean reproduction of your music all the way through to your speakers.

Read more

You'll find all connections and adjustment controls recessed on one side of the amp, for a neat installation and easy adjustment. Variable high- and low-pass 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 your subwoofer's level from the front seat.


  • 2-channel car amplifier
  • 80 watts RMS x 2 at 4 ohms (130 watts RMS x 2 at 2 ohms)
  • 260 watts RMS x 1 bridged output at 4 ohms (4-ohm stable in bridged mode)
  • CEA-2006 compliant
  • variable high- and low-pass filter (50-200 Hz, 12 dB/octave)
  • Q-Tune technology switchable bass boost (6 dB at 45 Hz)
  • optional wired remote subwoofer level control
  • Symmetrical Signal Technology (SST™) uses asymmetrical balanced inputs for noise cancellation
  • frequency response: 10-50K Hz
  • preamp and speaker-level inputs
  • fuse rating: 30A x 1
  • 8-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • 11-3/4"W x 2-3/8"H x 8-9/16"D
  • warranty: 2 years
  • Our 60-day money-back guarantee

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

Features and Specs
RMS Power Output (Watts x Channels) 80 x 2
Peak Power Output (Watts x Channels) N/A
Power at 2 Ohms (Watts x Channels) 130 x 2
Bridged Power (Watts x Channels) 260 x 1
Minimum Impedance Bridged 4
Minimum Impedance Unbridged 2
Best Frequency Response 10-50k Hz
THD at Rated RMS Power 0.05%
Signal to Noise Ratio 90 dB
Input Voltage 14.4v
Amplifier Class AB
Low-Pass Crossover Frequency 50-200 Hz
Low-Pass Slope (dB/octave) 12 dB/oct
High-Pass Crossover Frequency 50-200 Hz
High-Pass Slope (dB/octave) 12 dB/oct
Bass Boost +6 dB
Bass Boost Frequency 45 Hz
Fan Cooled No
Fuse Rating 30
Speaker Level Inputs Harness
Preamp Outputs No
Width (inches) 11-3/4
Height (inches) 2-3/8
Depth (inches) 8-9/16
Parts Warranty 2 Years
Labor Warranty 2 Years
Product Research
What's in the box?

Download owner's manual

  • Stereo amplifier
  • Two 30-amp ATO fuses (1 installed/1 extra)
  • 12" Speaker-level input harness
  • Four 3/4" Self-tapping screws
  • 3mm Alen wrench
  • Owner's Manual
  • Warranty information

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.



2-Ohm Stable: The GTA-802 can be connected to loads with impedances as low as 2 Ohms; the lower the impedance, the higher the output power:

  • 80 watts x 2 @ 4 ohms
  • 130 watts x 2 @ 2 ohms
  • 260 watts x 1 @ 4 ohms (bridged)

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 (line-level) or 0.4 Volts to 10.0 Volts (speaker-level).

Crossover Switch: Choose from high-pass, low-pass, and off (full range) for the crossover.

Crossover Frequency: The crossover (low-pass or high-pass) point is continuously variable from 50 Hz to 200 Hz; the slope is 12 dB/octave.

Q-Tune: Turn the Q-Tune on/off; the boost is +6 dB at 45 Hz.


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

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

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

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

GTA-RSL: RJ-14 port; connect an optional GTA-RSL remote level control (item number 065GTARSL, sold separately); the GTA-RSL is only functional when the low-pass crossover is engaged.

ATO Fuse: A single 30-amp ATO-type fuse is located between the speaker and power terminals.

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Boston Acoustics GTA-802 Reviews

Average Customer Review:

11 people say:

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4 out of 5

I would purchase it again.

Written By Audio Dad, Jacksonville, FL on Friday, February 01, 2013
Crutchfield Customer Review (What's this?)
Pretty nice Amp. It is easy to install, easy to adjust, and visually pleasing. Provides plenty of low end for my 4 door Altima while set at roughly 75% gain on a ported 10" Boston sub, in a ported Boston box.
Simplicity, power, clarity (Sub), and price.
Kind of large, adjustment screws/knobs a bit cheesy.
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5 out of 5

Great amp

Written By Matt C, Ellington, CT on Saturday, January 05, 2013
Crutchfield Customer Review (What's this?)
This amp rocks. Plain and simple. I don't think this could be a better value. I have it running bridged to one single 12 inch sub, with the amp gain up about 75% of the way. The sub BANGS, and the sound quality is fantastic. Great amp, no complaints.
Great value, small size, excellent performance
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5 out of 5

Clean power

Written By Anonymous, Columbus Ohio on Wednesday, November 28, 2012
Crutchfield Customer Review (What's this?)
Excellent amp powering hertz component speakers. No distortion , just clean power . I'm not hearing things in my music I couldn't hear before. Too bad Boston Ascoutic is getting out of the car audio business , they built some of premium products through out the years.
Clean power , solid design
1 out of 1 people found this helpful
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4 out of 5


Written By T, Ft Myers on Sunday, July 01, 2012
Crutchfield Customer Review (What's this?)
Using a pair of 80 watt Alpine speakers, this AMP has made the my system sound great. If you are considering boosting your system, I recommend the Amp. Very easy to install, not to large, fits under the passenger seat.
Great AMP, makes great sound.
1 out of 1 people found this helpful
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4 out of 5

Slow at first but better now

Written By ED, MD on Thursday, June 28, 2012
Crutchfield Customer Review (What's this?)
Had some issues with this amp overheating in my Camry. I have it pushing one JL 10 sub. I drive for about 1 hour to work so the amp would cut off around the 50 minute mark of my travel. Very frustrating. So I would have to keep the amp low which was not good for the 300 RMS sub that I have. What seemed to solve the issue is getting a cap for my system. Now the amp is rocking my sub with plenty of power. No cutting off now. I have one other amp pushing some infinity components so nothing to powerful in the car. But very happy now.
My Sub hits hard now.
Had to get a cap to keep the amp from overheating.
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4 out of 5

Solid Amp

Written By Anonymous, Midland, Tx on Sunday, March 25, 2012
Crutchfield Customer Review (What's this?)
Overall I was happy with this amp. It drives a 300rms Sony 12" Sub pretty good. Even with the gain turned almost all the way up the sound is still very clean and distortion free. This amp looks really nice under my back seat. The hookups are all on one side and recessed. The are also angled down slightly. This made for a very clean looking installation.
2yr Warranty. Low Distortion. Installed Appearance
Leaves me wanting just a hair more power.
1 out of 2 people found this helpful
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4 out of 5

Boston Acoustics GTA-802

Written By Mike, Baltimore on Saturday, February 11, 2012
Crutchfield Customer Review (What's this?)
Perfect Amp! Wanted to add a sub woofer to the factory Bose system in my car and it powers 2 "12 MTX perfectly. Had to turn the volume over 25...now its slammin at 5. Sound out the subs is clean when the hatch opens.
Price Size
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5 out of 5

Impressive for the price

Written By Brian, Tallahassee, FL on Friday, February 10, 2012
Crutchfield Customer Review (What's this?)
I was very surprised that I found an amplifier made by Boston that I can afford. I did not think twice about getting it because I know Boston Acoustics would not put there name on something unless they were proud of it. I bought this to replace my MTX terminator amp that was driving my Rockford 12. I am really tired of everyone writing reviews about subs and amps with a focus on "how hard it hits". I could make an amplifier in my garage that "Hits Hard" and rattles my trunk off. Let focus on how it sounds, after all this is a speaker right? I definitely noticed a difference in the sound quality of this vs. my old MTX. (they are very close in price) The Boston amp sounds cleaner with less unnecessary notes. The continuously variable crossover helps immensely leaving those notes above 80 or so hz to the woofers. I find myself wanting to drive my car just to listen to music. I would recommend this amp to anyone looking to power a sub with good clean sound, and sadly I guess I have to say it wont disappoint those folks looking to rattle my review mirror while your stopped next to me at a red light.
Variable Crossover, Plenty of power
1 out of 1 people found this helpful
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5 out of 5

Great Value

Written By Zack, Columbus, OH on Monday, January 30, 2012
I was a little skeptical due to the LOW price but I knew Boston makes quality products (I have the Soundware 5.1 Home Theater and LOVE it). I had this amp bridged mono to my Boston G210 ported sub enclosure and it HITS HARD. I wasn't expecting too much from one 10 inch sub and an 80x2 amp....WRONG. Great product, great price, great customer service.
Value - Styling - Power
None so far
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4 out of 5

excellent amplifier

Written By Adrian, Houston, TX on Sunday, April 17, 2011
Crutchfield Customer Review (What's this?)
I only gave this amp a 4/5 because i believe 5/5 rating is theoretically
impossible, unless of course the amp is made of unobtainium.

This amp gives my Focal 165VR components more than enough clean power.
It truly makes those speakers "come alive.". In fact it would not be hard to
believe that this amp's output is underrated.

One can not expect an entry level amp to be perfect though, it gets pretty warm
during heavy usage, but nothing to really be concerned about.

Once again Boston Acoustics has provided outstanding sound quality to those
of us who don't want to go bankrupt in the process.
9 out of 10 people found this helpful
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5 out of 5


Written By Steve, San Antonio, Tx on Tuesday, March 01, 2011
Crutchfield Customer Review (What's this?)
I installed this amp to run my JL Audio W1 12" subwoofer and hits beautifully. Turn the
Hertz all the way down 25 and the gain to about 3/4 with bass boost on and hits like no
other. Great price as well. Thanks crutchfield
3 out of 7 people found this helpful
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