Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Features

Amplifier: The power output from the built-in class-D amplifier is 90 watts RMS @ 14.4 volts with no more than 1% THD (100 watts RMS @ 14.4 volts and 10% THD).

Signal Input: The signal input wires on the included harness can be used with a speaker level or line level signal. Standard speaker wire is used in the harness, so an RCA to speaker wire adapter is needed when using a line level signal (item number 20609ZISL, sold separately).

Low Pass Crossover: The amplifier's low pass crossover point is continuously variable from 50 to 120 Hz; the crossover slope is 12 dB per octave.

Subsonic Filter: In addition to the low pass crossover, the PH12 features a 24 dB/octave subsonic filter fixed at 25 Hz. Ultra-low frequencies that cannot be reproduced by a subwoofer do not become sound, but unnecessary oscillations that cause distortion. These frequencies also waste amplifier power and can damage the speaker. The built-in subsonic filter removes the frequencies below 25 Hz to improve the sound quality by eliminating harmful distortion.

Bass Boost: The bass boost circuit provides a variable (0-6 dB) signal boost centered at 40 Hz.

Status Indicator Light: There is a status indicator LED on the control panel on the left side of the enclosure; it lights green to indicate that the amplifier is turned on and operating normally and lights Red to indicate the amplifier's protection circuitry has been activated.

Remote Bass Level Control: The included remote bass level control lets you adjust the output level of the amplifier from anywhere in the vehicle. A 20' cable is included and when it's plugged in, the gain control on the side of the enclosure is bypassed. The remote bass level control can be mounted under the dash with the included mounting hardware, it has the following dimensions:

• Width: 2.215"
• Height: 1.193"
• Depth: 1.718" (3.076" including the knob and cable)

Controls: All the PH12's controls and connections are located on the left side:

• Auto Turn-On: two position switch; choose +12V (amp turns on when +12 volts is applied to the remote turn-on wire) or DC Offset (amp turns on when a 6 volt surge is detected from a speaker-level source on the signal inputs; in this mode the amp's remote turn-on wire acts as a +12 volt output to turn on another component)
• Input Level: two position switch; choose Hi when using a speaker level input, Lo when using a line level input
• Phase: two position switch, the sub's phase can be easily inverted; 0° or 180°
• Gain: rotary knob; continuously variable from 125mV to 5V when the Input Level switch is set to Lo, 250mV-10V when the Input Level switch is set to Hi
• X-Over Frequency: rotary knob; set the low pass x-over point; continuously variable from 50 Hz to 120 Hz
• Bass Boost: rotary knob; continuously variable from 0 to +6 dB

Connections:

• Remote Bass: 3.5mm mini-jack for use with the included remote bass level control
• Fuse: a single 7.5 amp ATO style fuse protects the amplifier
• Wiring Input: Molex plug for use with the included power/ground/remote turn-on/signal input harness; the wire length varies by function:
  • Ground: 18"
  • Signal Input: 16'
  • Power: 19'
  • Remote Turn-on: 20'