You are bidding on a used Carver A-500X in good condition. It is my personal amplifier. The units works as it should. Minor wear for its age. Has new bulbs in the meters. It will be professionally packed for shipping. There are no problems. I have used it to power all the speakers in my collection from bookshelf speakers to my JBL 4435 with dual 15 inch woofers and my power hungry JBL L250s. You can also take it to the next level by bridging two units and creating an astounding 800 watts per channel mono blocks! Please call Bart with any questions 985 381 5086 Review: The A-500x uses Carvers newest power amplification technology Magnified Current. This technology enables the A-500x to provide either twice the continuous voltage or twice the continuous current needed by the loudspeaker load at any given time. With more than enough current and voltage-peak or continuous- the Lightstar-inspired A-500x is the ultimate consumer amplifier on the market today. In setting out to design the A-500x Carvers engineering team drew on lessons learned in the design and building of the acclaimed Lightstar Reference amplifier, a development hailed recently in Fi magazine as evidence that Carver Corporation has made a strong commitment to first-rate build quality as well as to engineering innovation.??Power output: 250 watts per channel into 8? (stereo), 800 watts into 8? (mono)Frequency response: 20Hz to 20kHzTotal harmonic distortion: 0.08%Damping factor: 150Gain: 29 dBInput sensitivity: 1.58VSignal to noise ratio: 117dBSpeaker load impedance: 2? (minimum)Dimensions: 483 x 146 x 478mmWeight: 13.2kg