About the Infinity Reference 5761a
Infinity Reference amplifiers boast impressive power ratings and fine-tuned controls ideal for sending your music to new sonic heights.
When you want an amp that's truly versatile, it's hard to go wrong with the 6-channel Infinity Reference 5761a. Its 4-channel section (56 watts RMS per channel) drives all your full-range or component speakers, while two subwoofer channels (107 watts RMS x 2) take care of your low-frequency needs. You can operate this amp in 3-, 5-, or 6-channel mode, so this is one amp that you'll never outgrow.
You can contour the output to suit your speaker setup with the variable high- and low-pass filters. Kick up the bass output with Infinity's Variable Bass EQ when you need a little extra impact. Speaker- and preamp-level inputs ensure this amp integrates smoothly into your system.
Product highlights:
- 6-channel amplifier
- 56 watts RMS x 4 + 107 watts RMS x 2 at 4 ohms (80 watts RMS x 4 + 148 watts RMS x 2 at 2 ohms)
- 56 watts RMS x 4 + 287 watts RMS x 1 in 5-channel mode
- 148 watts RMS x 2 + 287 watts RMS x 1 in bridged mode
- variable high-/low-pass filters on front and rear channels, low-pass only on sub channels (32-320 Hz, 12 dB/octave)
- variable Bass EQ on sub channels only (0-12 dB @ 50 Hz)
- CEA-2006 compliant
- 4-gauge power and ground leads recommended wiring and hardware not included with amplifier
- preamp- and speaker-level inputs
- optional wired level control
- fuse rating: 30A x 2
- 21-1/8"W x 2-11/16"H x 12-3/16"D
- warranty: 1 year
- MFR # REFERENCE 5761A
What's in the box:
Infinity Reference 5761a owner's manual
- 6-Channel amplifier with two installed 30 Amp ATC fuses
- Two 11" speaker-level input harnesses
- Two 30 Extra amp ATC fuses
- Four 1" Self-tapping screws
- 1 Silica gel packet
- One 8" x 2-1/2" Infinity sticker
- Instructions
- Quick Start Guide
- Warranty card
Customer reviews for Infinity Reference 5761a
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More details on the Infinity Reference 5761a
Features & specs
Performance | ||
---|---|---|
RMS Power Output (Watts x Channels) |
56 x 4 107 x 2 | |
Peak Power Output (Watts x Channels) | N/A | |
Power at 2 Ohms (Watts x Channels) | 80 x 4 | |
Power at 1 Ohm (Watts x Channels) | --- | |
Bridged Power (Watts x Channels) | 148 x 2 | |
Minimum Impedance Bridged | 4 | |
Minimum Impedance Unbridged | 2 | |
Minimum Impedance | 2 | |
Best Frequency Response | 10-57kHz Hz | |
THD at Rated RMS Power | 1% | |
Signal to Noise Ratio | 82 dB | |
Input Voltage | 14.4v | |
Features | ||
Amplifier Class | AB | |
Low-Pass Crossover Frequency | 32-320 Hz | |
Low-Pass Slope (dB/octave) | 12 dB | |
High-Pass Crossover Frequency | 32-320 Hz | |
High-Pass Slope (dB/octave) | 12 dB | |
Bass Boost | 0-12 dB | |
Bass Boost Frequency | 50 Hz | |
Fan Cooled | No | |
Fuse Rating | 30 x 2 | |
Speaker Level Inputs | --- | |
Preamp Outputs | No | |
Width (inches) | 21-1/8 | |
Height (inches) | 2-11/16 | |
Depth (inches) | 12-3/16 | |
Parts Warranty | 1 Year | |
Labor Warranty | 1 Year |
Product Research
Status LEDs: The amplifier has the following status LEDs:
- Clip: Indicates the amplifier is being overdriven, and your speakers may be in danger. This should blink only on musical peaks, and not be on constantly.
- Power: Indicates the amplifier is on
- Protect: Indicates any of the following problems: DC voltage on amplifier output, overheating, under voltage, over voltage, and short circuit in the speakers or wire
Variable Crossovers: The front, rear, and sub channels have separate crossovers. The front and rear channel filters can be set for low-pass, high-pass, or full-range operation. The sub channel filter is low-pass only and cannot be turned off. Each crossover can be adjusted from 32 to 320 Hz. In each case, the filter has a slope of 12 dB per octave.
Bass Boost: For added low frequency performance, the sub channels have a 0 to 12 dB variable bass boost centered at 50 Hz.
Sub Channel Input: The sub channels have a mode switch that can be set to one of the following options:
- External Input: When sending a dedicated signal to the RCA subwoofer inputs
- Internal Input: When using only the the front and rear inputs; this is useful if your receiver does not have dedicated subwoofer outputs
Remote Level Control Compatible: The optional 100rc wired remote level control (item number 108RC100) allows you to adjust the bass level from anywhere in the vehicle.
Right Side of Amplifier:
- +12V (power): 0.334" screw terminal, accepts up to 4 gauge wire
- Remote: 0.258" screw terminal, accepts up to 8 gauge wire
- GRD (ground): 0.334" screw terminal, accepts up to 4 gauge wire
- Speakers: 0.248" screw terminals, accepts up to 8 gauge wire
Left Side of Amplifier:
- Line Level Inputs: Three pair of RCA inputs for front, rear, and subwoofer
- Front High Level Input: 4-pin jack for use with supplied speaker-level input harness
- Rear High Level Input: 4-pin jack for use with supplied speaker-level input harness
- Remote Level Control: RJ-11 jack for use with the optional 100rc wired remote level control
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Customer Q&A
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I'm not an audiophile and therefore can't make comparisons between this and other amps, however I'm extremely pleased with this unit. It has ample power to drive my system. In my opinion a great value for the money.
Doug from Colorado Springs, CO