Tag Archives: stereo equalizer

Everything to Know about Bose 901 Series I and Series II Active Equalizer Repair & Speaker Systems (and the 800, too!)

Posted on June 12, 2026 by retrovoltage

A deep dive into the tips and tricks for repairing the Bose 901 Series I and II, plus the Bose 800 Series I and II, along with a discussion of their history and variations, sourced from direct experience repairing more than 500 examples. Includes schematics and parts lists. Continue reading →

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