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Weird Amps Nobody Remembers

Selmer
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Canadian made GBX were ahead of their time with each speaker cabinet was powered and one separate pre amp could run through as many cabs as you wished.
What years were those? Acoustic seemed to have pioneered that concept with the 360, then Sunn followed suit with the failed Orion series soon after, ‘68-ish. Some of those Ovations listed above where based on that concept, I believe. But if GBX was on it first, very interesting.
 
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His take on providing gear that would withstand the rigors of touring, the speaker cabs looked like roadcases themselves, an idea not lost on Mesa Boogie.

That reminds me, anyone remember the Sound City [This invalid link has been removed] Tour Series amp? Designed to "withstand the rigors of touring" indeed, these things were built like the proverbial brick outhouse...I remember their very early promotional material mentioned something about loaning prototypes to a world famous rock band so they could road-test them, and the band wound up throwing the amps out of a hotel window! Naturally, the amps survived. My bandmates and I always used to argue about who the lucky band was...
 
An amp I never used but spent a lot of time around:

@agedhorse: Andy, you familiar with Webb amps out of Antioch, CA ? I had two brother-in-laws who were both pedal steel guys, and that's what they used. All SS, but the warmest 'no tubes!' amps I ever heard. Older design, theirs ran JBL's from those days, had LOTS of headroom, never heard the steel even begin to load one up.
Great amps.
I remember the name but can't picture the amps.
 
That reminds me, anyone remember the Sound City [This invalid link has been removed] Tour Series amp? Designed to "withstand the rigors of touring" indeed, these things were built like the proverbial brick outhouse...I remember their very early promotional material mentioned something about loaning prototypes to a world famous rock band so they could road-test them, and the band wound up throwing the amps out of a hotel window! Naturally, the amps survived. My bandmates and I always used to argue about who the lucky band was...


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IF I had one of these 80's wonders in fighting shape . . .
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. . . . and this keeping it company:

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I'd never ever look at amps again. As clean and smooth as I ever heard. They DON'T make them like that any more. I could get real silly and pack a REV 7 on top of them !

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Always wanted me one of them there digit-all reverber-ators!
 
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After a couple of small Alamo amps, my first "real" amp was a kit by Southwest Technical Products Corp, aka 'SWTPC". It was their "MMM Instrument Amplifier" 60 watts, 2 channels, reverb & tremolo. I put it together and it didn't work - rats. I sent it back to them, and they fixed it - turned out I had installed every transistor BACKWARDS! Figured out later why I did that. The transistor markings on the board were little half moons, to match the shape of the transistors. Instead of lining them up to match, I had put them in so the flat side of the transistors faced flat side of the board markings (why!?!?). Anyway, once repaired (I think they charged me about half the price of the amp), it worked great. Awesome reverb is my main memory. Couldn't afford the matching speaker cab, so I built my own to match - huge cabinet (way too big) for with two 12" Radio Shack speakers (later replaced with 15s)covered with tolex, chrome corners, strap handles - I felt big time, then.
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I remember SWTPC as one of the earliest entrants into the microcomputer market. I never saw one in person, but they advertised in computer magazines.

Here's an archive with many of their catalogs, etc. Many of their products were written up as articles in hobby magazines.

Southwest Technical Products Archive
 
IF I had one of these 80's wonders in fighting shape . . .
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. . . . and this keeping it company:

View attachment 4638477

I'd never ever look at amps again. As clean and smooth as I ever heard. They DON'T make them like that any more. I could get real silly and pack a REV 7 on top of them !

View attachment 4638485

Always wanted me one of them there digit-all reverber-ators!
You’d need to sit it all on a pile of natural wood Bag End speaker cabs, preferably a mix of 18” and 12” drivers. Yeah!!
 
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I only bring these up as they had massive headroom (a steel is a real handful) and the best 'not tube' warmth I ever heard.
When I started out, I remember Standels, Earth, Sunn, the early Acoustics, early SWR. The ones I look back nostalgically on are from the 80's, OG British-built Trace Eliott (an utter revelation in those days) and the P-Series Yamaha power amps: If Crown Royal would have made professional touring stereo power amps, it would have sounded like the P Yamahas. I forget the model, but I once test-drove the Trace rig with the stereo power head (AH600?) running two 410's sitting on top of two single 15's, all Trace bins. Wow!

An amp I never used but spent a lot of time around:

@agedhorse: Andy, you familiar with Webb amps out of Antioch, CA ? I had two brother-in-laws who were both pedal steel guys, and that's what they used. All SS, but the warmest 'no tubes!' amps I ever heard. Older design, theirs ran JBL's from those days, had LOTS of headroom, never heard the steel even begin to load one up.
Great amps.
All my older friends who played out in the east bay used Fender heads with Webb cabinets. They were tight with Mr. Webb, he did repairs and stuff for them, he was like an uncle to these guys. I was a Leo's guy myself, 16th & Clay, Oakland, CA. He, too, was like an uncle - a mean uncle!
 
As a young boy I played my bass on my fathers 1959 Supro 1624T Dual Tone Vintage Valco USA 1x12 Tube Amplifier.
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Wow, Lookit that! I played guitar for several years through a pair of 1 x 10 Valcos that looked like that, but slightly narrower (three inputs, volume, tone, pilot light, switch). The tweed was more of a tan-gray instead of just gray. One had a flocked screen grill and the other had a cane grill, like an old Mesa-Boogie. Same chassis, except one was gold with a black stripe and the other was black with a white stripe.

Pretty cool little amps, with (2) 12AX7, (2) 6973 and (1) 5Y3 rectifier.
 
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All my older friends who played out in the east bay used Fender heads with Webb cabinets. They were tight with Mr. Webb, he did repairs and stuff for them, he was like an uncle to these guys. I was a Leo's guy myself, 16th & Clay, Oakland, CA. He, too, was like an uncle - a mean uncle!
If you scroll down to post #35, I believe, there's a great description of Leo's Music and more mention of Webb Music. I do not know the poster:
What were music stores like in the '50s & '60s?
 

IF I had one of these 80's wonders in fighting shape . . .
View attachment 4638476

. . . . and this keeping it company:

View attachment 4638477

I'd never ever look at amps again. As clean and smooth as I ever heard. They DON'T make them like that any more. I could get real silly and pack a REV 7 on top of them !

View attachment 4638485

Always wanted me one of them there digit-all reverber-ators!

I serviced that line when working at a Yamaha service shop back in the late 1970's, very well designed and executed. The only challenge was that they used a wire wrap style attachment for many of the interconnects which were a giant pain in the butt.

Actually, many of the later pro audio power amps used a similar architecture, but the execution was not quite so robust. P-2200's (and 2201's) were a mainstay of some of the pro touring companies back then, especially in the theatrical reinforcement world. We used some at the sound company as well, and we were almost exclusively Yamaha for consoles and processing with a couple of SDE-1000's tossed in.

I also worked on the processing, owned a couple of Rev 7's, Rev 90-II's, Rev-900's, Rev-990's, lots of eq's, crossovers, a dozen M-406 rack mixers, etc. It was an expensive way to go in the short term but saved a ton in the long haul. The gear lasted forever. I still have some rack mixers that are 25 years old and still work perfectly with a lot of hours on them. Never had to "re-cap" anything and they still meet the original spec.

I remember SWTPC as one of the earliest entrants into the microcomputer market. I never saw one in person, but they advertised in computer magazines.

Here's an archive with many of their catalogs, etc. Many of their products were written up as articles in hobby magazines.

Southwest Technical Products Archive

They were an attempt to beat Heathkit at their own game, but the sheet metal was pretty poor and the designs weren't all that stable. When they failed, it was generally pretty spectacular. I worked on a bunch, but stopped because I couldn't warranty the repairs with any confidence.
 
Plenty of people knew about Sunn, they were major players for at least a few years. Granted, that amp displayed is a guitar model; they started out as a bass amp company with some unique for the time innovations, and the guitar rigs were just trickle down afterthoughts. But you could always use the ‘guitar’ models for bass to great effect.

And vice-versa! I have this Sunn 200S 60W bass head, but have used it primarily as a guitar amp, to the point where I don't even know what it would sound like in its originally-intended use for bass.

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