For sale is a sweet and nice Fosgate Audionics 4 channel power amplifier model 4125 if you google it there is and it's hard to find any info on it
The amp it's a 4 channels amp at 75 watts x 4 channels in 8 ohms and can be bridged to 225 watts x 2 channels in 8 ohms.
The sound that comes out of this amp is very full and kind of warm as if it was a tube amp plays very well and sweet the amp is a beast and very heavy ..
For the money you have to spend ten times that to find a good amp ...
here are the specs
Power output: 4 x 75w @ 8 ohms, <0.15% THD/IMD 4 x 110w @ 4 ohms, <0.25% THD/IMD 2 x 225w @ 8 ohms, <0.25% THD/IMD
Power supply: 1.5 kVa torroidal transformer with 33,000 mfd storage capacitance, 50 amp peak current
I like to add there is a nick on the top of the amp .... but does not hurt it in looks and sound ....