Your search for Line Output Converter returned the following:
Video: Installing A Car Amplifier
Watch a brief video to get an overview of what's involved in installing an amp in a vehicle.

AudioControl LC2i
2-channel line output converter for adding amps to your factory system
IN STOCK- 2-channel active line output converter
- designed to work with most factory systems
- 2 speaker-level inputs with 400 watts RMS power handling
Scosche LOC80
2-channel line output converter
IN STOCK- 2 speaker-level inputs
- 2 RCA outputs
- rated for stereos up to 80 watts per channel
Scosche SLC4
Four-channel line output converter
IN STOCK- 4 speaker-level inputs
- 4 RCA outputs
- rated for stereos up to 80 watts per channel
AudioControl LCQ-1
6-channel line output converter with equalizer — add amps to your factory system (Gray)
IN STOCK- 6-channel line output converter
- designed to work with any factory stereo
- 6 high-level inputs
AudioControl LCQ-1
6-channel line output converter with equalizer — add amps to your factory system (White)
IN STOCK- 6-channel line output converter
- designed to work with any factory stereo
- 6 high-level inputs
AudioControl DQL-8
Digital processor with 8-channel line output converter
LOW STOCK- 8-channel line output converter/processor
- designed to work with any factory stereo
- 8 high-level inputs with up to 400 watts RMS power handling
AudioControl LC6i
6-channel line output converter for adding outboard amps to your factory audio system (Gray)
IN STOCK- gray 6-channel line output converter
- designed to work with any factory stereo
- 6 speaker-level inputs with 400 watts RMS power handling
AudioControl LC6i
6-channel line output converter for adding outboard amps to your factory audio system (White)
IN STOCK- white 6-channel line output converter
- designed to work with any factory stereo
- 6 speaker-level inputs with 400 watts RMS power handling
AudioControl LC8i
8-channel line output converter with auxiliary input add outboard amps to your factory audio system (Gray)
IN STOCK- 8-channel line output converter
- designed to work with any factory stereo
- 8 high-level inputs with 400 watts RMS power handling
AudioControl LC8i
8-channel line output converter with auxiliary input add outboard amps to your factory audio system (White)
IN STOCK- 8-channel line output converter
- designed to work with any factory stereo
- 8 high-level inputs with 400 watts RMS power handling
PAC SOEM-4
Universal 4-channel line output converter
IN STOCK- 4-channel input and output wiring
- independent level controls
- 12-volt amplifier turn-on trigger wire
