Infinity's Reference Series amplifiers offer impressive power and extensive controls for fine-tuning your sound an ideal way to boost your music's intensity and clarity. Strict reliability testing results in durable, dependable amplifiers, and their compact size gives you more installation options in tight places.
The heavy-hitting Infinity Reference 475a 4-channel amplifier sends 75 watts RMS to each of your front and rear speakers. Or, you can bridge the amp to 2-channel mode, and pump out 360 watts total to your two subs. And every Infinity Reference amplifier is certified to deliver power as advertised.
The variable frequency filters and adjustable bass boost let you contour the amp's output to suit your speakers or subs for more efficient output and cleaner low-end kick. Preamp outputs simplify hookup to another amp in your system, so system building is quick and easy. Direct-connect terminals make reliable connections without need for any crimping or soldering.
- 4-channel car amplifier
- 75 watts RMS x 4 at 4 ohms (90 watts RMS x 4 at 2 ohms)
- 180 watts RMS x 2 at 4 ohms in bridged mode
- CEA-2006 compliant
- variable high- and low-pass filters (32-320 Hz, 12 dB/octave)
- variable bass boost (0-6 dB at 50 Hz)
- Class-AB amplifier design
- MOSFET power supply
- preamp-level inputs and outputs
- fuse rating: 35A x 2
- 8-gauge power and ground leads recommended
- RMS Power Output (Watts x Channels) 75 x 4
- Peak Power Output (Watts x Channels) 117 x 4
- Power at 2 Ohms (Watts x Channels) 90 x 4
- Bridged Power (Watts x Channels) 180 x 2
- Minimum Impedance Bridged 4
- Minimum Impedance Unbridged 2
- Frequency Response 20-20k Hz
- THD at Rated RMS Power 1%
- Signal to Noise Ratio 85 dB
- Input Voltage 14.4v
- 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 0-6 dB
- Bass Boost Frequency 50 Hz
- Fuse Rating 35 x 2
- Speaker Level Inputs No
- Preamp Outputs 1 pair
- LED Power Indicator Yes
- Width (inches) 9
- Height (inches) 2-11/16
- Depth (inches) 14-3/4
- 14-3/4"W x 2-11/16"H x 9"D
- Warranty: Full 1 year
- Condition: May have light cosmetic scratches.
- Reason for discount: Factory refurbished unit.
- Includes: Amplifier, bass knob, and manual.
475-a - Infinity 4-Channel Full-Range Amplifier 475a 
