FOR SALE: Marantz MA500 Mono-block Power Amplifier. I used it to power one channel of my vinyl playback system using a pair of Scott Endler preamps. The sound quality is excellent but I am now use a tubed stereo amp. I am only rating this unit as only "good" since the "Standby" LED remains illuminated during use producing a very low volume slight hum that is not noticeable during playback even at very low listening levels such as a soft, non-instrumental vocal passage. It is only noticed between songs and does not increase in volume as the volume is turned up. I'm selling this amp for $75.00. Shipping will include the delivery charge to buyer's address plus $12 for packaging materials (oversize box, bubble wrap and peanuts). The following is a description of the amp: "The Marantz MA-500 THX Ultra certified Monoblock Power Amplifier measures just 33/4" in width, yet delivers 125 watts into 8 ohms. The MA-500 is ideal for creating multi-channel home theater and multi-room systems or for adding additional channels of amplification to an existing system. High Current Power Supply offers true low impedance drive capability--125 watts into 8 ohms and 180 watts into 4 ohms. Two MA-500's can be Bridged together to produce over 360 watts into 8 ohms. Compact Design--5 MA-500's occupy the width of a single conventional stereo power amplifier."