Running monoblocks in parallel to increase watts??

The inversion technique works with transistor amps (and is the way that car stereos get 15 w/channel while running only 12 volts).

That technique is: the load goes between the two '+' outputs. This assumes that the '-' outputs are tied to ground. One amp then uses an inverted signal while the other uses a non-inverted signal.

For tube amps *in general* the + outputs are tied together and the - outputs tie together and the load is between the resulting + and -. The inputs are 'Y'd together.

Power does not always double- with transistor amps and most tube amps it does but there are exceptions- for example with our S-30 the output power goes from 30 watts/ch to 90.

In all cases a loss of delicacy will be observed. This is due to minor variance between the channels. In tube amps this can be reduced by matching tubes in the left and right channels so as to reduce the variance. There is nothing to be done in the case of transistor amps.

You *do* have to be careful! One wrong step and you can quickly toast something!

I see nothing wrong with someone asking us our opinion even if we are not all experts. And I don't claim to be. But is it not correct that bridging is very simular to balanced and is why you have more gain with a truly balanced design.

Bridging is definately balanced. That is why you see bridge-able transistor amps with balanced inputs that only run in balanced mode. But there is no association with greater gain, although it is possible to achieve greater gain with less noise when running balanced.

>>I see nothing wrong with someone asking us our opinion even if we are not all experts<<

OK I'll buy that but are you willing to compensate the inquirer for any problems your "opinion" causes?

In this particular case the potential for serious and/or expensive damage to speakers and amplifiers exist if faulty "opinions" are followed.

I suggest you follow Harry Callahan's advice in the movie Magnum Force:
"Man's gotta know his limitations"

Thanks for the insight and discussion. I think I'll stay with what I got since I am not technically inclined to feel confident in the safety of this application. Lots more too it than I thought.

One of the few problems with AGon is its lack of a stronger more refined search engine. I hope maybe they are working at improving it.

Thanks to everyone for their time and input, especially Ron at Atma-sphere (was it him??) who is busy building amps and working on his own stuff I am sure.

R.