Alpine S-A32F

Features

Overview: The Alpine S-A32F 4-channel amplifier is effectively two full range 2-channel amps built into one chassis, labeled Channel 1/2 and Channel 3/4. Each section of the amp is bridgeable, so it can be wired as 4-channel, 3-channel, or 2-channel.

CTA-2006 Compliant: CTA-2006 is a system of testing and measurement for mobile audio amplifiers. This voluntary standard advocates a uniform method for measuring an amplifier's RMS power output and signal-to-noise ratio. The criteria for measuring amplifier power uses a DC input voltage of 14.4 volts and the RMS power output is measured over a frequency range of 20 Hz to 20 kHz (for full range amplifiers), with 1% or less Total Harmonic Distortion plus noise (THD+N). Signal-to-Noise ratio is measured in weighted absolute decibels (dBA) at a reference of 1 watt into 4 ohms. CTA-2006 standards allow consumers to compare car amplifiers and receivers under the same conditions (apples to apples).

CTA-2006 Specifications:

• Power Output: 55 watts RMS x 4 into 4Ω
• Signal to Noise Ratio: 83 dBA (measured at 1 watt into 4Ω)

Other Specifications:

• Power Output:
  • 2Ω: 80 watts RMS x 4 (14.4 volts, ≤1.0% THD+N)
  • Bridged: 160 watts RMS x 2 (14.4 volts, into 4Ω)
• Signal to Noise Ratio: 98 dB (at rated power output, into 4Ω)
• Frequency Response:
  • +0/-3 dB (1W into 4Ω): 10 Hz - 30 kHz
  • +0/-1 dB (1W into 4Ω): 20 Hz - 20 kHz

Controls

Gain Control: There are independent rotary gain controls for the two sections of the amplifier (Channel 1/2 and Channel 3/4). The amp will accept preamp level signals from 0.2 volts to 4.0 volts or speaker level signals from 0.5 volts to 10 volts.

Input Level: Set the input level switch to match the type of input signal used (Hi for speaker level and Lo for preamp level).

Crossovers: Channels 1/2 and 3/4 have independent crossovers. Each crossover has a 3-position switch to direct how it operates and both crossovers have a slope of 12 dB/octave.

• Off: output is full range
• HP: High Pass; crossover point is adjustable from 50 Hz to 400 Hz
• LP: Low Pass; crossover point is adjustable from 50 Hz to 400 Hz

Optional Remote Control: The amplifier has an RJ-25 jack for adding the optional RUX-KNOB.2 wired remote level control for adjusting the channel 3/4 output remotely. The remote has a 20dB adjustment range (-20 dB to 0 dB relative to the gain setting).

Connections

Power/Ground: Two set-screw terminals connect the power and ground cables. The terminals accept up to 8-gauge wire (an 8-gauge wiring kit is recommended). The set screws are tightened/loosened with the included 2mm Allen wrench.

Remote Turn-on: The remote turn-on set screw terminal will accept up to 8-gauge wire. The set screw is tightened/loosened with the included 2mm Allen wrench.

Speaker Outputs: The four pair of speaker outputs' set-screw terminals will accept up to 10-gauge wire. The set screws are tightened/loosened with the included 2mm Allen wrench.

Signal Input: Two pair of RCA jacks, labeled Channel 1/2 and Channel 3/4, connect to preamp level or speaker level input signals. If connecting the source unit's speaker wire to the input jacks, use a Speaker-to-RCA adapter or splice speaker wire to an RCA plug. When using a speaker level input signal, it may not be necessary to connect a remote turn-on lead because of the amplifier's remote sensing function.

Fuses: The 40-amp ATO fuse protects the amplifier. Another fuse (40-amp minimum) should be placed on the +12V power wire within 18" of the battery.