Find:
About Me
Blogs
- Antique Radio Blog
- Arcane Radio Trivia
- Audio Tweak
- Audioklassiks
- BuildLounge
- Classic Receivers
- Coffman Labs Blog
- Confessions of a Part-Time Audiophile
- EEVBlog
- Engineering Radio
- Glowbugs Times
- Glowbugs Web
- Guitar Fool
- Hack a Day
- HeavyDIY
- High on Solder
- Ilektronx
- MicroSyl
- Nick's Radio Corner
- Old Stock Audio
- Pragmaddux
- Radio Stuff
- Radio Time Traveller
- Richard Sears, Vintage Electronics
- Seventies Stereo
- The Paleotechnologist
- The Signal Path
- Tube Addict
- TubeSound
Friends
Resources
- 901
- Active Equalizer
- AM
- amplifier
- Antique
- antique radio
- audiophile
- Bose
- Bose 901
- Bose Active Equalizer
- Bose Equalizer
- bose equalizer repair
- bose repair
- capacitor
- capacitor replacement
- cost engineering
- Craigslist
- eBay
- Equalizer
- fried electronics
- GE
- General Electric
- grunow
- grunow 586
- grunow 589
- grunow chassis 5-U
- grunow radio restoration
- ham radio
- hf
- hi-fi
- HP
- KN0CK
- laptop
- LCD
- LF-116
- old radio
- oscilloscope
- philco
- photos
- power supply
- projects
- radio
- rca
- rebuild
- repair
- replacement
- restoration
- RTL-SDR
- RTLSDR
- SDR#
- seattle vintage radio repair
- Series 1
- series I
- series II
- series IV
- shortwave
- soldering
- Sony
- Speakers
- speaker spotter
- stereo
- stromberg-carlson
- test equipment
- transistor radio
- tube
- Tube Amp
- tube radio
- up-converter
- Upconverter
- vacuum tube
- vintage
- vintage ad
- vintage radio
- Westinghouse
- zenith
Categories
January 2026 S M T W T F S 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Meta
Category Archives: Stereo
The Speaker Spotter – Speakers of Craigslist – March 21st, 2014
There’s always something interesting for sale on Craigslist, especially in Seattle. Here’s a selection of especially notable vintage speakers and other audio products for sale on the local Craigslist. I’m not affiliated with any of these sales, but if you’re interested, you … Continue reading
Posted in Audio, Collections, Photos, Speakers, Stereo, Vintage
Tagged 1A, 4330, AX5-4, bi-radial, biradial, butt cheeks, Cerwin, Cerwin Vega, CX-300, DCM, hi-fi, Horn, jbl, JBL 4330, JBL L88, JBL LE-8, Klipsch, L88, La Scala, Lascala, LE-8, loudspeaker, LSI, Monitor, monitors, Revox, Revox AX5-4, Snell, Snell C, speaker, speaker spotter, Speakers, studio monitors, Time, TimeWindow, Totem, Totem ARRO, Universal, Universal CX-300, Vega, vintage
1 Comment
Bose 901 Series I Active Equalizer #30924 Repaired
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
Posted in Audio, Bose, Electronics, Projects, Stereo, Vintage
Tagged Active Equalizer, Bose, Bose 901, capacitor, capacitor replacement, Equalizer, repair, restoration, Series 1, series I, vintage
Leave a comment
The Speaker Spotter – Speakers of Craigslist – March 14th, 2014
There’s always something interesting for sale on Craigslist, especially in Seattle. Here’s a selection of especially notable vintage speakers and other audio products for sale on the local Craigslist. I’m not affiliated with any of these sales, but if you’re interested, you … Continue reading
Posted in Audio, Collections, Photos, Speakers, Stereo, Vintage
Tagged 12W, 15W, Active Equalizer, Akai, altec, altec lansing, Bose, Bose 901, cornwall, Craigslist, Duchess, E-V, Electro-Voice, Electrovoice, Equalizer, EV, heresy, heresy II, KG4, Klipsch, Regency, S-1117, Sansui, series I, series II, series IV, Series V, SKO, SP-100, SP-12, SP12, speaker, speaker spotter, speakerlab, Speakers, speakers of craigslist, SW 177, T25, T25A, T35, The Duchess, Voice of the Theater, Voice of the Theatre, W-35, WD-35, Wharfedale
2 Comments
Bose 901 Series II Active Equalizer #120325 Repaired
I recently had the opportunity to work on another Bose 901 Active Equalizer, Series II. This particular model had been in service for a long time in active use and was showing its age. It was sent back to Bose … Continue reading
Posted in Audio, Bose, Electronics, Projects, Stereo
Tagged Active Equalizer, Bose, Bose 901, capacitor, capacitor replacement, Equalizer, hi-fi, repair, Series 2, series II, vintage
Leave a comment
The Speaker Spotter – Speakers of Craigslist – March 7th, 2014
There’s always something interesting for sale on Craigslist, especially in Seattle. Here’s a selection of especially notable vintage speakers and other audio products for sale on the local Craigslist. I’m not affiliated with any of these sales, but if you’re interested, you … Continue reading
Posted in Audio, Collections, Photos, Speakers, Stereo, Vintage
Tagged Allison, Allison One, Bose, Bose 601, Corner Horn, Craigslist, Fisher, Fisher XP95B, Infinity, Infinity Kappa 8, Infinity RSe, k horn, Kappa 8, kenwood, KL-333D, KL-777A, klipschorn, LS-20, Marantz, Marantz LS-20, OA-14, photo, photos, RSe, series III, Seven, Six, Sonab, Sonab OA-14, speaker, speaker spotter, speakerlab, Speakers, speakers of craigslist, Super Seven, vintage, XP95B
1 Comment
Bose 901 Active Equalizer #20262 Repaired!
This Bose 901 Series I Active Equalizer came to me from North Carolina, where it had been stored in original packaging for many years. Unfortunately even with careful storage the equalizer wasn’t in running condition and it looks like the … Continue reading
Posted in Audio, Bose, Electronics, Projects, Stereo, Vintage
Tagged Active Equalizer, Bose, Bose 901, capacitor, capacitor replacement, Equalizer, repair, Series 1, vintage
Leave a comment
Bose 901 Series I Early Production Equalizer Full Repair
I just had another Bose 901 Series I equalizer through the shop for the standard service. It didn’t have a visible serial number, but is definitely a very early production version. The Active Equalizer was revised once through the model’s … Continue reading
Posted in Audio, Bose, Electronics, Projects, Stereo, Vintage
Tagged Active Equalizer, Bose, Bose 901, capacitor, capacitor replacement, Equalizer, repair, Series 1
1 Comment
Ohm Acoustics Model D Speaker Refurbishment
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
1962 Zenith MK2670 Classic Tube Hi-Fi Console Stereo Repaired
A version of this article appears in the October 2014 issue of Nuts and Volts magazine. I recently got to work on something a little bit different – a tube hi-fi stereo console! This particular one, a 1962 Zenith MK2670, was a very high-end … Continue reading
Posted in Audio, Projects, Radios and Tubes, Stereo, Vintage
Tagged antique radio, capacitor, capacitor replacement, hi-fi, MK2670, radio, repair, restoration, tube radio, vacuum tube, vintage, vintage radio, zenith
26 Comments
1977 Yamaha CR-2020 Vintage Stereo Receiver Repair
If you’re looking for a repair for this particular model of receiver, sorry – Rain City Audio no longer takes Yamaha CR series for repairs due to them requiring such an extreme amount of work. This post is a good … Continue reading
Posted in Audio, Electronics, Hi-Fi, Music, Stereo, Vintage
Tagged amplifier, audiophile, capacitor, capacitor replacement, classic, CR-2020, hi-fi, receiver, repair, stereo, vintage, vintage receiver, walkthrough, yamaha, Yamaha CR-2020
34 Comments