Bose® 901 Series II Active Equalizer #81471 Repair

From Rain City Audio:

This Bose® 901 Active Equalizer, Series II #81471, just came through the shop for a repair. It’s owner sent this one all the way from Ontario, Canada for expert repair from Rain City Audio.

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This one was repaired at some point, with the three main filter capacitors replaced in the past, but even these were failing. Replacing the components was a straightforward job.

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This one got an upgrade to film output capacitors, and also hand-selected transistors.

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A new power lamp was also in order:

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With a full set of new components and a selection of upgrades, this equalizer went home sounding fantastic, and should be great for a long time to come!

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This entry was posted in Audio, Bose, Electronics, Projects, Stereo, Vintage and tagged , , , , , . Bookmark the permalink.

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