Features
- 4-Channel full-range amplifier with on-board electronic crossover and variable bass boost
- 12dB variable bass boost circuit is provided to optimize the low frequency performance of your system
- Variable 12dB per octave electronic crossover allows you to optimize system tuning based on speakers and location
- Full-range preamp outputs facilitate use of multiple amplifiers without the need for adapters or signal splitters
- One-year warranty
The Price Was: $279.95
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| Product Description |
Amazon.com
Infinity's Reference 475a is a 4-Channel full-range amplifier with on-board electronic crossover and variable bass boost. Features include a high-output PWM MOSFET power supply for optimum power delivery into numerous impedances with low distortion, full-range preamp outputs for multiple amplifier hookups without the need for costly Y-adapters or signal splitters, a variable 12dB per octave electronic crossover allowing you to optimize system tuning based on speaker location and accompanying loudspeaker components, and plenty more.
Infinity Reference Series Amplifiers Looking for a more moving audio experience? Take Infinity car audio for a ride. Innovative materials and breakthrough engineering have always put Infinity products out in front of the competition. So expect extreme output from Reference Series amps, but be prepared for accuracy and detail that may surprise you. There is no better way to make your car audio system stand up and deliver than by powering your speakers and subs with Infinity electronics.
4-Channel full-range amplifier with on-board electronic crossover and variable bass boost. Click to enlarge.
Infinity 475a Features
Class D Subwoofer Amps
Efficiency is the benefit of the Infinity Reference Series Class D subwoofer amplifiers. A higher percentage of the power the amp extracts from the car's charging system is converted into output to the speakers, and less is wasted as heat. That is really important if you're trying to provide power to a 1000-watt amplifier. Class D technology turns the analog input signal into a series of pulses that can be amplified more efficiently by transistors used as switches, rather than valves. They're either on and operating at their most efficient level, or they're off. The pulses are converted back into an analog signal by an output filter.
CEA-2006-Compliant
All Infinity amplifiers are tested in accordance with CEA-2006, which provides a testing procedure to help customers compare amplifiers accurately--apples to apples. Specs are based on industry-accepted standards, rather than on the whims of amplifier companies' marketing departments. Look for the CEA-2006 logo when comparing amplifiers, to be sure you're getting the power you're paying for.
Audiophile-Quality Full-Range Amplifiers
Class AB full-range amplifiers offer audiophile quality performance and the best compromise between efficiency, low distortion, maximum available headroom and output power.
Amps That Don't Break
Infinity amplifiers are tested according to the strictest and most demanding reliability-testing regimen ever designed for car audio amplifiers. They are shaken, baked, frozen, dropped and shocked--all while they're operating. When they've passed all these tests, they are tested again. The result is a series of amplifiers that just don't break.
DBO Bass-Optimization Circuit
provides superior control and adjustability, compared to traditional bass-boost. DBO is a 2nd order high-pass filter that can be adjusted between 20Hz and 80Hz. The boost (or Q)
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