This amplifier arrived brand new on Friday, 2/3/2012. I tested it and took pictures. Works perfectly. No hum. No hum in speakers at any volume. Exceptionally clean sound. Very cool, no heat!. I really could list it a 10/10. The audible diference between 150 watts and 200 watts about 1 db...extremely minimal. Everything that came with it is inlcuded. Power cord, trigger wire, owners manual, 5 year warranty, original packing. With its efficient Class A/B design, the PA 7-150 runs very cool, and so is ideal for situations where excess heat production is a problem. The elegant 17 inch wide sculptured front panel houses a master power switch and seven blue LEDs;audiophile-grade input and output connectors on the rear panel complete the picture. Here are the details: •150 watts per channel (x7) @ 8 Ohms (with no more than 0.05% THD from 20 Hz -- 20 kHz, all channels driven) • 220 watts per channel (x7) @ 4 Ohms (with no more than 0.05% THD from 20 Hz -- 20 kHz, all channels driven) • Power bandwidth: 5 Hz - 150 kHz • Signal to noise ratio: 110 dB / A weighted • Gain: 30 dB • Input impedance: 40 kOhms • Sensitivity: 1.1 volts • Dynamic headroom: 1.3 dB • Massive 1.2 kVA toroidal power supply • High efficiency, class A/B design • Trigger input / output • Power supply: 120 V / 60 Hz or 230 V / 50 Hz (selectable) • Carton weight: 84 lbs. • Dimensions: 17"W x 19"D x 7.5"H This represents a thousand dollar savings on an amplifier that is less than 30 days old so buyer pays shipping and PayPal.