Hertz High Compact Power Mono D-Class Car Audio Amplifier
 
HCP 1D is a mono, 1400W D Class amplifier , with an incredibly small heat sink. 

 
Output Power (RMS) @ 14.4 VDC, THD 1%:
1 Ch: 320 W x 1 (4 Ohms)
1 Ch: 550 W x 1 (2 Ohms)
Output Power (RMS) @ 14.4 VDC, THD 10%:
1 Ch: 380 W x 1 (4 Ohms)
1 Ch: 700 W x 1 (2 Ohms)