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Old 3rd October 2011, 09:34 AM   #1
aspiens is offline aspiens  Russian Federation
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Default Upgrade and restore Threshold S300

Bought on ebay amplifier. Huge heavy and hot) Can it be improved? Was progress for 30 years?Sound good.Working ok!
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Old 4th October 2011, 04:27 AM   #2
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There's tons of sage advice out there.

Start with replacing the electrolytic caps.

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Old 4th October 2011, 06:09 AM   #3
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I replaced the large electrolytics with RIFA PEH169, the NFB decoupling caps with Auricaps and the RCAs/binding posts with Cardas/Vampire. And definitely replace any tantalums if you have any on board. It's a reasonably good amp now. Only substantial upgrade i can think of is a separate regulated supply for the front end.
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Old 4th October 2011, 07:56 AM   #4
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shotki there is no need to install? What brandname and volume large electrolytics capacitors is preferable? I dont know about tantalums on board.
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Old 4th October 2011, 08:14 AM   #5
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its ok?

63V 100000uf Electrolytic Capacitor Radial 75x120mm x10 | eBay
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Old 4th October 2011, 08:25 AM   #6
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or this?

50v 220000uf Electrolytic Capacitor Radial 90x140mm x 1 | eBay
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