VMPS Large Subwoofers
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avguytx
Lunatic Member
You might post that question at this forum as they would be the most knowledgeable of VMPS. Some might be here, though.
https://www.audiocircle.com/index.php?board=39.0
https://www.audiocircle.com/index.php?board=39.0
SleeperSupra
Super Member
Both drivers are original. I own the same as the one on the left, that one has the upgraded 12 inch woofer. It originally had the woofer on the right.
The sub sounds real good with about 600 watts rms crossed over between 60-80 hz.
The sub sounds real good with about 600 watts rms crossed over between 60-80 hz.
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StimpyWan
Addicted Member
They are VMPS Larger Subs. They have 12" and 15" active woofers, with a down firing 15" passive radiator. The passive radiator uses rope putty for mass loading. Once installed and placed in the room, the putty is designed to be slowly removed, a tiny bit at a time, to tune the bass to the equipment and room.
Awesome subs. They were also used by JPL for vibrational testing of outer space bound electronics.
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StimpyWan
Addicted Member
Oh yea, there are separate inputs for each woofer. They can be wired together for mono use, or each woofer can be wired individually, for stereo. The Larger had the option of a passive crossover, but most were shipped requiring external amps and crossovers. Brian Cheney liked this Parts Express amp for his subs.
https://www.parts-express.com/dayton-audio-sa1000-subwoofer-amplifier-rack-mountable--300-811
https://www.parts-express.com/dayton-audio-sa1000-subwoofer-amplifier-rack-mountable--300-811
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StimpyWan
Addicted Member
Looking at the picture, the left sub looks like an upgraded Larger. The top woofer, with the phase plug, came later. Brian later offered a woven carbon fiber megawoofer, with the phase plug too. These Goldwood 15" woofers were used as an upgrade as well.
https://www.parts-express.com/goldwood-gw-15pc-8-15-heavy-duty-woofer-8-ohm--290-338
https://www.parts-express.com/goldwood-gw-15pc-8-15-heavy-duty-woofer-8-ohm--290-338
StimpyWan
Addicted Member
One last thing. There were Larger, Original, and Smaller subs. The Original used a single 12" active with a down firing 15" radiator. The Smaller used a 12" active with a 12" down firing radiator. Later, the upright Larger was redesigned as a horizontal Larger. Next was the 215 sub, with a 15" active and a down firing 15" passive. Brian's final sub design was the Very Large Array, with four 12" woofers and dual 15" passive radiators.
http://pointillistic.com/vmps-audio/index.htm
http://pointillistic.com/vmps-audio/index.htm
SleeperSupra
Super Member
I couldn’t tell exactly what cone that was on my phone, mine has the woven carbon fiber 12 with the phase plug and the upgraded passive radiator.
