Tuesday, 14 January 2014



Sherwood S-5500  Tube Amplifier

This Integrated tube amp with the 4 x 7868 output pentodes rocks big time!  tested it with JBL 4335 studio monitors in a huge room, 100 square meters and 5 meters high ceilings. This combination filled easily the room with an incredible rich and precise bass fundament. The only comparable amplifier is the amp unit of the 1967 Pioneer SX-800A. A very graceful sound without any importunity. 

This 1960 or 1961 Sherwood tube stereo amp is 64 watts per channel – very powerful for a tube amp. It is detailed and spacious, whether listening to an iPod, CD or a turntable. It was designed and built in Chicago in a factory on north California Street.


  1. This is great. I really love your page. The very creative use of weird objects is inspiring. How do you like the PowerDrive with the GM-71 at lower voltage? I am afraid of the kilovolt range. I have a couple GM-70s and might try to replicate your circuit. Thank you Good and productive post. Keep update more like this.
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