Great vintage solid state amplifier and a perfect match for an SP6, SP3, SP9 etc. Perfect working condition and fully tested.At this price, I’m not sure why anyone would buy a modern Chinese made unit over this piece of USA made heavy duty amp. Beautifully made with massive transformer and caps. The power supply caps are the size of soda cans. Some Tech Specs:Power output 60 watts per channel minimum RMS (both channels operating) at 8 ohms from 1 Hz to 20 kHz with less than .25% total harmonic distortion. Typically less than .02% at rated power in midband. Approximate actual power available at "clipping" (both channels operating) 150 watts (4 ohms), 75 watts (8 ohms). Frequency response 1 Hz to 100 kHzInput sensitivity 1.1 V RMS for rated power and loadInput impedance 30 K ohmsDamping factor More than 500 at rated power and loadDistortion Intermodulation distortion: Less than .1% at rated outputHum & noise Wide band unweighted, more than 90db below 60 watts at 8 ohms-power line components (Hum) more than 80 db below 60 watts at 8 ohmsPower requirements 105-120/210-240 VAC 50/60 Hz 600 watts maximum. 120 watts at idle. 300 watts at rated power. Other Dimensions 19" W x 5 ¼" H x 10 ½" D. Handles extend 1 ½" forward of the front panel. (Standard rack mount panel)Weight 38 lbs. Net, 45 lbs. Shipping