Product highlights:

• active 2-channel line driver/output converter with bass restoration
• designed to work with aftermarket and factory systems
• provides up to 9.5 Vrms output (selectable level: 5, 7, 10V)
• preamp and speaker-level inputs
  • speaker-level inputs handle up to 40V (400 watts RMS)
  • speaker-level inputs feature switchable load resistance (20, 60, or 20,000 ohms) to prevent factory stereo shut-down
• Epicenter bass restoration increases bass response
  • Para-Bass controls adjust center-frequency and width of bass EQ processing

More info:

• ACR-4 wired remote included
• switchable Programmable Frequency Match (PFM) subsonic filter (20 Hz, 12/dB octave)
• selectable ground isolation helps eliminate noise
• auto turn-on via 12V remote, DC offset, or audio signal detect
• 12-volt turn-on lead output
• wiring, fuse, and hardware not included with device
  • 18-gauge power and ground leads and a 1-amp fuse recommended
• dimensions: 5-1/8" W x 1" H x 3" D