Bose® 901 Series II #102678 Restoration

Cross-posted from the Rain City Audio Repair Blog:

Another Bose® Active Equalizer came through the shop, this one’s a Series II. The owner reported that one channel had failed and the switches were badly gummed up. Time for a rebuild!

Inside, it was mostly original, although the three 500 uF filter capacitors had been replaced by the look of it.

This one received all new resistors and capacitors, including an upgrade to film output capacitors for improved clarity and detail reproduction.

Ready to go home!

This equalizer cleaned up beautifully, and it’s going to be a great performer for years to come.

If your Bose® Active Equalizer needs work, Rain City Audio can help!

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