Tag Archives: Crossover

Ohm Acoustics Model D Speaker Refurbishment

Posted on February 21, 2014 by retrovoltage

Classic speakers are always a delight to work on, and speakers have capacitors and other parts which require service, too. Over the years those components can fail and result in poor sound and even potential speaker damage. In this case, … Continue reading →

Posted in Audio, Hi-Fi, Projects, Speakers, Stereo, Vintage | Tagged , , , , , , , , , , , , , , | 1 Comment

First Ever Bose 901 Series 1 Active Equalizer Repair

Posted on July 25, 2012 by retrovoltage

This post is almost 15 years old! Check out this much more recent round-up of Bose 901 Series I and II Active Equalizer repair tips and tricks, and leave a comment if you have any feedback. The post you are … Continue reading →

Posted in Electronics, Projects, Speakers, Vintage | Tagged , , , , , , , , , , , , , , , , | 37 Comments

Refurbishing Vintage Sansui SP2500 Speakers (Crossover Repair)

Posted on April 5, 2011 by retrovoltage

I’m always keeping my eyes out for interesting vintage hi-fi speakers from the ’60s-’70s, and found a nice set of Sansui SP2500s on Craigslist. Produced between 1960 and 1974, these beautiful walnut speakers are solid and very heavy – definitely … Continue reading →

Posted in Electronics, Projects, Vintage | Tagged , , , , , , , | 38 Comments