Tag Archives: Active Equalizer

Bose® 901 Active Equalizer Series I #17118 Repaired

Posted on February 2, 2015 by jwk

Cross-Posted from the Rain City Audio Repair Blog: This Bose® 901 Active Equalizer came in through the shop for the standard overhaul service. It was showing its age, as most of these equalizers from Series I and II will do … Continue reading →

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Bose 901 Series 1 Active Equalizer #46453 Repair

Posted on December 22, 2014 by jwk

Cross-posted from the Rain City Audio Repair Blog: Another Bose® 901 Series I Active Equalizer came through the ship, Serial #46453. It came in with a variety of issues, just not sounding like it used to, and the owner requested … Continue reading →

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Bose® 901 Series IV Active Equalizer #116907 Overhaul

Posted on December 12, 2014 by jwk

Cross-posted from the Rain City Audio Repair Blog: Another Bose® 901 Series IV Active Equalizer came through the shop recently. It’s owner shipped it in without the wooden cover for security. This is a bad idea on the Series I/II, … Continue reading →

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Bose® 901 Series I Active Equalizer #33133 Overhaul and Upgrade by Rain City Audio

Posted on December 8, 2014 by jwk

Cross-posted from the Rain City Audio Repair Blog: Another Bose® 901 Series I Active Equalizer was through the shop lately, serial #33133. It came in working well enough on its original components for an overhaul and upgrade to ensure it … Continue reading →

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Esteemed Bose® Model 901 Active Equalizer – Serial #230 Repair

Posted on October 17, 2014 by jwk

Cross-posted from Rain City Audio: I had the distinct pleasure of working on one of the earliest  Bose® Model 901 Active Equalizers from Series I’s first production run. Serial #230, in fact! It’s made entirely by hand and shows traces … Continue reading →

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Bose Active Equalizer Model 800 #003833 Repair

Posted on May 15, 2014 by jwk

I just finished a new project over at Rain City Audio – Bose Active Equalizer Model 800 #003833 Repair

Those Bose Active Equalizer model 800 is from the early run of the Bose 800 PA system, which is very similar to the Bose 901 direct/reflecting speaker system. The equalizer had bad noise and distortion in both channels when I got it, but after a repair works and sounds perfect and will last for a long time to come.

Check it out at http://www.raincityaudio.us/blog/bose-active-equalizer-model-800-003833-repair! Continue reading →

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Bose 901 Series II Active Equalizer #111058 Repair and Upgrade

Posted on April 16, 2014 by jwk

This Bose 901 Series II equalizer just came through the shop for an overhaul and upgrade. It’s in pretty good shape except for a small piece of delaminating contact paper on the side, but isn’t showing any signs of having … Continue reading →

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Bose Active Equalizer Model 800 Repair – Bose 800 Active Equalizer

Posted on April 9, 2014 by jwk

A new one for the shop, I recently worked on a Bose Active Equalizer model 800. This is very similar to the Bose 901 Series II active equalizer; the 800 series were Bose’s PA speaker series from the same model … Continue reading →

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Bose Equalizers on eBay Need Service Too: A Photo Comparison

Posted on March 31, 2014 by jwk

You’ve had your Bose 901 Series I or Series II speakers in storage for a few years, the Active Equalizer packed away with them and now you’ve pulled them out to set up your vintage system once again. Great – … Continue reading →

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Bose 901 Series I Active Equalizer #30924 Repaired

Posted on March 18, 2014 by jwk

I recently got to work on another Bose 901 Series I Active Equalizer, Serial #30924, which needed some service. It’s coming from the original owner who purchased them new in 1970, they went into storage about 10 years ago when … Continue reading →

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