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Sherwood AM-8500

Stereo Power Amplifier

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Sherwood AM-8500


Power output: 200 watts per channel into 8Ω (stereo)

Frequency response: 5Hz to 150kHz

Total harmonic distortion: 0.04%

Damping factor: 150

Input sensitivity: 1V

Signal to noise ratio: 120dB

Speaker load impedance: 2Ω (minimum)

Dimensions: 440 x 150 x 400mm

Weight: 22.5kg



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Reviewed Nov 02nd, 2016 by

This is my first amplifier. I purchased it used even tho it has a type c plug and a adapter to use in the States. The amp is paired to a Yamaha cx-1 preamp and GNP Valkyrie (A) and Altec Model 14 (B) speakers. The sound produced is warm, uncolored, detailed, and with a great presence. I haven't turned the volume past half way because it's just to loud and I don't think the neighbors two streets away want to hear 'Master of Puppets'.
The amp runs warm/hot but not HOT! Under the hood is the dual power supply, large filter caps (4) and giant heat sinks. From my learning, this amp's design is usually found in much higher end gear brand names with a high price. The case is silver. This power amp is very very heavy.
In the 15 months I've owned it in my strictly music rig, it's been problem free and runs strong. I love this amp.



re: AM-8500

Around 9 months ago I took off the lid for a annual blowing the dust out cleaning with compressed air and a soft slim paint brush. Screws the lid back on and waited a day to reconnect it. When I powered it on....it went POP! And some white'ish smoke rose from the top back left side. I disconnected everything and opened it back up for a look. However I failed to notice any signs of damage. Then again I'm not proficient in amplifier repair or diagnostics.
Keep meaning to take it to a technician.

KareDany's picture

re: AM-8500

Hi TheSleezstak:

In your post on November 19 you say:

Then again I'm not proficient in amplifier repair or diagnostics.

But if you have knowledge of electronics (this amplifier has +/- 74.5 Volts in the power of the audio output MOSFETS, it means 159 Volts between the two ends of the electrolytic capacitors of the power supply and it can be dangerous to discharge the same) and a multimeter you can try to check and repair your Sherwood amplifier. If you have this knowledge we can try to guide you in the repair of your amplifier.

Greetings from:


This website is not affiliated with or sponsored by Sherwood. To purchase AM-8500 spares or accessories, please contact the company via their website or visit an authorised retailer.