I've had these amps for awhile. Never installed. Both are BNIB. One is a 4 channel and the other is a mono amp. $300.00 for the pair. Will not separate amps, please don't ask. More information on the amplifies can be found in the links below.

Kenwood KAC-8401:
Kenwood KAC-8401 60W x 4 Car Amp at Crutchfield.com

Kenwood KAC-8151D:
Kenwood KAC-8151D 200W x 1 Mono Subwoofer Amp at Crutchfield.com