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USamps at the time made what was called a VLX25. It was 12.5rms x 2...... yes I said that right stereo at 4ohm but when bridged at .25 ohm would do about 1200rms. I ran the 100 watt consumer class with 4 of these at a .25 load. My buddy Micheal Glen did the same amps in a hatchback civic with 12 12s and took world finals by over 3db to the nearest competitor 161.6db if i remember right and was a WR for the class. Mind you this is a 100watt class. Was not long after that they changed classes and rules a bit. But if they want power to be printed on the outside there ya go! And it does exactly what it say it does! Its just "printed" stereo at a 4ohm load when it can do a lot more when bridged and ran down at a lower impedance.
USamps made these in 4 models that I remeber. VLX50 same as the VLX25 in power at .25ohm the VLX25 replaced the VLX50 so we could run 4 amps instead of 2 and still stay in the 100 watt class. They also made a VLX200 and a VLX400. VLX 400 is a straight out beast. 4000+rms at a .25 ohm load. Mind you these amps are capable of running this type of load for burps. You would not want to run it this way for daily use. Also electrical system must be strong enough to support the loads.
The VLX 200 and 400 are much easier to find. You can find a good used vlx 400 for around $800 to $1000. It is "rated" 200rms x 2 Trust me it is 3 feet of pure power once bridged and you lower the impedence @ 1ohm bridge 2400rms. This load would be safe for daily use. Just have electrical to back it. But if you are looking for something printed lower than it really is capable. This is the way to go. BTW you cant use these anymore in USACI or Iasca. They say it is cheating :) But for a local org you bet you A** i would run them. Even if just to make a point that classes by printed or stamped numbers on an amp means nothing.
Oh and another cool fact. The were test rated at 12.6 volts. Not the 14.4 volt of the usual standard today.