Daily Archives: January 20, 2016

BoseĀ® 901 Series IV Active Equalizer #501554 Overhaul and Upgrade

From the Rain City Audio Repair Blog: This BoseĀ® 901 Series IV Active Equalizer, serial #501554, came into the shop with the owner reporting that it loses output on one channel and the sound degrades the longer it is powered … Continue reading

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