I think I remember there being a 12" Bandmaster tone ring cab with a JBL D120F loudspeaker like the Nashville Cats used to like to use in their Twin Reverb's. But I couldn't find any pictures of them on Google Images, or references online. A cab like that would have been very rare, I would think. And I may be mistaken, too. That was a while ago. If you had a tone ring cab, in all likelihood I think it would have been a 15.
I do know that at the time, JBL didn't make a 12" bass guitar speaker. Just their 15" D140 / E140's derived from their LE15A. Wonderful loudspeakers, very sensitive and sweet as honey! Back then, they accomplished with superior craftsmanship and very tight tolerances what is attempted today with brute force power, and slop. Harman was recently purchased by Samsung Electronics, so we'll see. I hope they stop messing around with stupid connected cars in India and start concentrating on making loudspeakers, or they will wind up like Boeing.
I sold so many JBL loudspeakers in the San Francisco Bay Area they flew me down to LA and gave me a tour of the factory, and also, of Capitol Records. They offered me a position with JBL as a sales representative, but the job would have been in Chicago! I remember chewing it over one day while I was outside washing my 442. It was a beautiful clear day with bright blue sky, just a few snow white clouds and a light breeze at about 75 degrees temperature. Then I remembered when I was a kid flying into Detroit, Michigan and stepping out of the "Connie" onto the rolling stairs when a blast of sub '0' Artic wind cut through my jeans like a searing hot knife! The extreme cold was literally painful. I called JBL that afternoon and told them thanks anyway, but I didn't want to leave California. California was paradise back then... California girls in black bikini's on the Santa Cruz Beach Boardwalk, baby! We used to headline at the Cocoanut Grove Ballroom on the Boardwalk there:
This is the Boardwalk complex looking from the Pacific Ocean side. They must have taken that picture from a helicopter.
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This is a more close up shot of the ballroom from the outside, obviously.
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That's the stage on the upper right side of the photograph taken from the balcony that surrounds the entire dance floor. On the right side of the photograph you can see where the balcony stops right next to the stage. If you look closely you can see the railing. There's another big room off to the left with the rounded wall and big picture windows facing the ocean as you can see in the above photograph. Obviously, there were no tables and chairs on the dance floor when we played there.
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A much more reserved crowd than we would draw on Saturday night in Santa Cruz! But it gives you a good idea what the stage was like. If you stepped on the brass cannon microphone jacks embedded in the stage floor from the old house PA, you got 220 volts through your feet! Even if you were wearing thick soled shoes! It felt like 220 volts, anyway. Maybe they fixed that by now.
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Here's a shot with more people where they had something set up in front of the stage. It gives you an idea how big the joint was. Perfect for a Dual Showman (or two for bass!)
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We got evicted from our apartment when my wife became ill (and lost her job of 20 years for not showing up for work), and I lost all my photographs of us playing that room.