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Boston Acoustics GTA-704

500W 4-Channel Class AB GTA Series Amplifier

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GTA Series Class AB 4-Channel Amplifier • 70W x 4 Chan. @ 4 Ohm • 125W x 4 Chan. @ 2 Ohm • Symmetrical Signal Topology • Q-Tune Circuitry • Integral Mounting System • Wrap-Around Heatsink Design

Learn more about the gta704

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This item has been discontinued

Product Highlights


GTA Series Class AB 4-Channel Amplifier • 70W x 4 Chan. @ 4 Ohm • 125W x 4 Chan. @ 2 Ohm • Symmetrical Signal Topology • Q-Tune Circuitry • Integral Mounting System • Wrap-Around Heatsink Design

Description


GTA Series High Performance Amplifier

Sonic Electronix is now carrying the new 2011 line of Boston Acoustics GTA Series Amplifiers. These amps come in Monoblock, 2-Channel, 4-Channel, and 5-Channel configurations as well as numerous different power ratings. Each one these GTA Series amplifiers feature a wrap-around heatsink design, SST (Symmetrical Signal Topology), IMS (Integral Mounting System), 3-way protection circuitry, fully adjustable Q-Tune circuitry, and much more.

The GTA-704 is a 4-channel version of this series and has an RMS power rating of 70 watts x 4-channels wired at 4 ohms and 125 watts x 4-channels wired at 2 ohms. It is equipped with gold-plated RCA level inputs & screw terminals and is powered by a MOSFET power supply. The option of low-level, or high-level inputs will allow the installation of these amplifiers into any system with ease. The fully adjustable low-pass/high-pass crossovers will allow for complete control of all frequencies allowing for personalized tuning of your audio system to better meet your musical needs and preferences. GTA amplifiers offer high performance with advanced features and technologies.

Product Features
  • 4-Channel Class AB GTA Series Amplifier
  • RMS Power Rating:
    • 4 ohms: 70 watts x 4 chan.
    • 2 ohms: 125 watts x 4 chan.
    • Bridged, 4 ohms: 250 watts x 2 chan.
  • MOSFET power supply
  • Optional Bass Remote available Boston Acoustics GTA-RSL(remote level control sold separately)
  • LED power and protect indicators
  • SST (Symmetrical Signal Topology) system uses balanced asymmetrical inputs for noise cancellation
  • Fully adjustable Q-Tune circuitry for simple bass output optimization
  • Recessed control panel for clean installation
  • IMS (Integral Mounting System) reduces the amplifier footprint
  • All input/output connections are located on one side of the amplifier to ease installation and wire management
  • Optimal angled speaker and power blocks for easy wire connections
  • 4-Channel/2-channel operation
  • Speaker-level (high-level) inputs with signal sensing for automatic turn-on
  • Preamp RCA outputs to daisy chain multiple amps
  • 3-Way System Protection circuitry (thermal, overload, and speaker short protection)
  • Fully adjustable and selectable lowpass/highpass crossovers
  • Wrap-around heatsink design for extreme heat dissipation
  • Gold-plated RCA level inputs
  • Gold-plated screw terminals
  • Variable High-Pass Filter (50-200 Hz, 12 dB/octave)
  • Variable Low-Pass Filter (50-200 Hz, 12 dB/octave)
  • THD (Total Harmonic Distortion): 1%
  • Signal to Noise Ratio: 90 dB
  • Frequency Response: 10-50,000 Hz
  • Input Voltage: 14.4 volts
  • Fuse Rating: 25 amp x 2
  • CEA-2006 compliant amplifier
  • Dimensions: 8-3/8"D x 14-3/4"W x 2-3/8"H
  • 4-gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits when purchased together with this amplifier.
  • 1-year Manufacturer's warranty

Specifications & Details


Power Specifications - Full Range Channels
RMS Power @ 4 ohms
70 watts x 4 channel
RMS Power @ 2 ohms
125 watts x 4 channel
Bridged RMS Power
250 watts x 2 channel
Amplifier Specifications
Amplifier Class
A/B
Number of Channels
4-Channel
Total Peak Power Output
Not specified by manufacturer
Total RMS Power Output
500 watts
Maximum Input Gauge Size
4 AWG
Minimum Impedance Unbridged
2 ohms
Minimum Impedance Bridged
4 ohms
THD at Rated RMS Power
1%
Speaker Level Inputs
Yes
Preamp Outputs
1 pair
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
High-Pass Crossover Frequency
50 - 200 Hz
Low-Pass Crossover Frequency
50 - 200 Hz
Signal-to-Noise Ratio
90 dB
Channel Separation
Not specified by manufacturer
Bass Boost
Q-Tune Circuitry
Remote bass/level controller
Optional (Accessory required and sold separately)
Fuse Rating
25A x 2 
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

GTA-704

Weight:

8.50lbs

Internal SKU:

gta704

Internal Product ID:

39777

Product and How-to Videos


Customer Ratings & Reviews



5 star
100%
4 star
0%
3 star
0%
2 star
0%
1 star
0%



Durability
5
Value
5
Features
5
Design
5
Usability
5

Customer Reviews

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Great door speaker amp

I have a pair of Boston SC65s, a pair of Boston SE75s (4x6s), and 4 pairs of aftermarket tweeters and this amp keeps all of them properly powered. The amp puts out very clean power even at high volume and it doesn't take all that much power off the vehicles electrical system. This amp has many great features like both RCA inputs and speaker level inputs, I would use the RCA inputs because it's easier and the sound quality could be better with RCAs. I would recommend this amp to anyone that is looking for a good 4 channel amp for door speakers.

By Bradley on May 13, 2012

4

found this helpful.

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