CTS Speakers

ETI 1974 08 p89 a5c590507322

Chicago Telephone Supply (CTS) originally built drivers for telephone network signaling and tone generation. By the late 1950s they expanded into loudspeakers, supplying the booming tube-amp market.  Their speakers, often marked with the EIA code “137,” were used extensively by Fender, Ampeg, and many other amplifier companies from the 1950s through the 1970s. Early CTS … Read more

ETONE: Gold 12″ Guitar Speaker

IMG 9493 f0499b36798f

Etone speakers are a bit of a hidden gem in the guitar world, with their roots firmly planted in Australia. Manufactured in Sydney, these speakers were often considered the local (and cheaper) alternative to Celestion. Unfortunately there isn’t much detailed information available on the specs, but it’s widely believed that they have a ceramic magnet … Read more

BELL & HOWELL: Gaumont, Model 601 Projector Amplifier, 1949

Bell Howell Model 601 stack f3b4c5075f7e

I know, I know—this is starting to drift even further from pedal circuits with each post, but stick with me for a moment. These old Bell and Howell projector amps have quite the following, so I’ve been keeping an eye out for one for a while. The catch is, they don’t pop up on the … Read more

AMPRO: Vintage Projector Extension Speaker Cabinet

IMG 7671 8463b095bcbf

This is an extension speaker from a vintage projection system, and I wanted to jot down a few notes since information on this particular version seems scarce. Most examples I’ve seen online are housed in brown cases from the USA (Ampro, based in Chicago). Those typically feature Jensen or Ampro-branded speakers, and some even include … Read more

ROLA: Vintage Australian Guitar Speakers & Transformers

Rola PEG vintage speaker 1a45d17e1af7

Rola is better known as an American speaker maker, but there was also Rola Australia, based in Melbourne, which made speakers, transformers, chokes, and other related items. They also produced speakers in the UK and NZ.  As a local manufacturer of quality products, Rola Australia found its way into many Australian-made guitar amps. Their biggest … Read more