This is a great sounding JBL UREI 6260 bridgeable rack mount power amp. It is good for a studio or permanent install as it is very heavy (about 49 lbs.)  it is rated at 150 w per ch into 8 ohms and  600w bridged into 8 ohms and has an active ballanced input.

JBL UREI 6260 Power Amp

JBL UREI 6260 Power Amp