About the Boston GT-5750
High Power at Low Impedance
High Power at Low Impedance
Boston Acoustics builds versatility and power into their GT Reference Series amps, so they'll deliver clean, dynamic performance in any kind of system. A high-current design combines with highly efficient output transistors to allow these amps to drive low-impedance loads safely, so you can get more out of your system.
Drive speaker set or sub
The GT-5750 5-channel amp takes care of your car's entire system, delivering 70 watts RMS by four channels to your front and rear speakers, plus up to 375 watts RMS to your subwoofers. You get the power and features you need to give your music some real impact and presence, all housed in a single chassis. Q-Tune™ technology lets you adjust the sound of your full-range speakers to blend in better with your subwoofer.
Advanced electronics
Boston Acoustics uses high-quality components that allow this amp to respond with lightning speed — you'll really notice the difference with percussive sounds like drums and piano. A computer-controlled diagnostic system monitors and protects against overheating, excessive voltage, and short circuits, so you'll get years of dependable musical enjoyment out of this amp.
Product highlights:
- 5-channel car amplifier
- 70 watts RMS x 4 plus 250 watts RMS x 1 at 4 ohms (100 watts RMS x 4 + 375 watts RMS x 1 at 2 ohms)
- front and rear channels 1-ohm stable (125 watts RMS x 4 at 1 ohm + 375 watts RMS x 1 at 2 ohms)
- CEA-2006 compliant
- variable high-pass filter (20-350 Hz, 12 dB/octave)
- variable low-pass filter (50-250 Hz, 12/24 dB/octave)
- Q-Tune technology for crossover adjustment
- cooling fan
- frequency response: 10-95,000 Hz
- preamp-level inputs
- fuse rating: 100A x 1
- two 4-gauge power and two 4-gauge ground leads recommended — wiring and hardware not included with amplifier
- adjustable mounting feet
- 22-1/4"W x 2-3/8"H x 9"D
- warranty: 1 year
- MFR # GT-5750
What's in the box:
- 5-Channel amplifier
- 100-amp AFS fuse (installed)
- 6 Self-tapping screws (4mm x 20mm)
- 3mm Hex wrench
- 2mm Hex wrench
- 0.250 Female quick-slide
- Owner's Manual (English/ French/ Spanish)
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More details on the Boston GT-5750
Features & specs
| Performance | ||
|---|---|---|
| RMS Power Output (Watts x Channels) |
70 x 4 250 x 1 | |
| Peak Power Output (Watts x Channels) | N/A | |
| Power at 2 Ohms (Watts x Channels) | 100 x 4 | |
| Power at 1 Ohm (Watts x Channels) | --- | |
| Bridged Power (Watts x Channels) | N/A | |
| Minimum Impedance Bridged | N/A | |
| Minimum Impedance Unbridged | 1 | |
| Minimum Impedance | 1 | |
| Best Frequency Response | 10-95k Hz | |
| THD at Rated RMS Power | 1% | |
| Signal to Noise Ratio | 100 dB | |
| Input Voltage | 14.4v | |
| Features | ||
| Amplifier Class | AB | |
| Low-Pass Crossover Frequency | 50-350 Hz | |
| Low-Pass Slope (dB/octave) | 12 or 24 dB/oct | |
| High-Pass Crossover Frequency | 20-350 Hz | |
| High-Pass Slope (dB/octave) | 12 dB/oct | |
| Bass Boost | No | |
| Bass Boost Frequency | N/A | |
| Fan Cooled | Yes | |
| Fuse Rating | 100 x 1 | |
| Speaker Level Inputs | --- | |
| Preamp Outputs | No | |
| Width (inches) | 22-1/4 | |
| Height (inches) | 2-3/8 | |
| Depth (inches) | 9 | |
| Parts Warranty | 1 Year | |
| Labor Warranty | 1 Year | |
Product Research
Features
GT-series Amplifiers: The Boston Acoustics GT-5750 amplifier is part of the GT-series, which feature high efficiency output stages that deliver increased power into lower impedances, and maximum dynamics and transient response. The advanced fan cooling system allows you to mount the GT-series amps in varied positions. The low profile design and adjustable mounting feet make installation in tight locations much easier.
Top-mounted AFS Fuse: The amp is equipped with a 100-amp AFS-type fuse, located on the top panel under the removable cover. The fuse is held in place by 2 Phillips-head screws.
Adjustable Mounting Feet: The mounting feet on the GT-5750 can slide along the front and rear edges, allowing you to adjust the mounting points of the amplifier. The feet can adjust between 3/4" and 19-1/4" apart.
Controls
Top-mounted Controls: The amplifier has controls conveniently mounted on the top panel under a removable cover. The controls include:
- Front Input Sensitivity: adjust the front channel input gain with this rotary control; the range is continuously variable from 0.2 Volts to 8.0 Volts
- Front High-pass Filter: select a high-pass crossover point using the rotary control, the range is continuously variable from 20 Hz to 350 Hz; a two position switch allows you to turn the high-pass filter On or Off
- Q-Tune Control: once the front channel high-pass crossover point has been determined, use the rotary Q-Tune control to adjust the bass information centered around the crossover point
- Rear Signal Routing: set the rear channel input source; dedicated rear input or single input for front and rear
- Rear Input Sensitivity: adjust the rear channel input gain with this rotary control; the range is continuously variable from 0.2 Volts to 8.0 Volts
- Rear High-pass Filter: select a high-pass crossover point using the rotary control, the range is continuously variable from 20 Hz to 350 Hz; a two position switch allows you to turn the high-pass filter On or Off
- Q-Tune Control: once the rear channel high-pass crossover point has been determined, use the rotary Q-Tune control to adjust the bass information centered around the crossover point
- Subwoofer Signal Routing: set the sub channel input source; dedicated stereo input, dedicated mono input, or single input for front and subwoofer
- Subwoofer Input Sensitivity: adjust the sub channel input gain with this rotary control; the range is continuously variable from 0.2 Volts to 8.0 Volts
- Subwoofer Low-pass Filter: select a low-pass crossover point using the rotary control, the range is continuously variable from 50 Hz to 350 Hz; a three position switch allows you to choose the crossover slope (12 dB/octave or 24 dB/octave) or turn the crossover off (full range)
- GT-RSL (Sub Channel Only): two position switch allows you to turn optional Remote Subwoofer Level control (item number 065GTRSL--see below) on or off
Remote Subwoofer Level (GT-RSL): The GT-5750 has a front-mounted RJ-45 port for connecting the optional GT-RSL Remote Subwoofer Level Controller for GT Amplifiers (065GTRSL, sold separately). When the GT-RSL is connected and switched on, you can control the level of the subwoofer remotely.
Connections
Front-mounted Terminals: The GT-5750 has all of the cable connections on the front of the amplifier for a clean installation. The terminals include:
- Front Input: Left and right RCA jacks for the front channel input signal from the head unit
- Remote: 0.250" male quick slide for connecting the remote turn-on lead from the head unit; a 0.250" female quick slide is included for terminating your remote lead
- Rear Input: Left and right RCA jacks for the rear channel input signal from the head unit
- Remote: 0.250" male quick slide for connecting the remote turn-on lead from the head unit, a 0.250" female quick slide is included for terminating your remote lead; the three remote terminals are internally shorted together, so only one needs to be connected
- Subwoofer Input: Left and right RCA jacks for the sub channel input signal from the head unit
- Remote: 0.250" male quick slide for connecting the remote turn-on lead from the head unit, a 0.250" female quick slide is included for terminating your remote lead; the three remote terminals are internally shorted together, so only one needs to be connected
- GT-RSL: RJ-45 port, covered by a removable plate, for connecting an optional GT-RSL Remote Subwoofer Level Controller (065GTRSL)
- Speaker Outputs: six pair of set-screw terminals are provided for connecting the speakers (there are two subwoofer outputs, internally shorted together); the terminals accept up to 12-gauge wire; the set screws are tightened/loosened with the supplied 2mm Hex wrench (Note: You must first remove the top cover to access the set screws for the speaker and power terminals.)
- Power Input: the power and ground connections each have two set-screw terminals; the terminals accept up to 4-gauge wire; the set screws are tightened/loosened with the supplied 3mm Hex wrench
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