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Hi Lou,What you suggest for a biamping configuration is what I use with my VR100XS system. I have beefy solid state amps connected to the woofer terminals. This allows me to select amps for the mid/tweeter terminals that may not have the best deep bass extension or woofer damping control, but that have strengths of detail, correct timbre, air, microdynamics, etc.It's very difficult and expensive to find one amp that excels all areas and since you already have amps that fit the bill for the bass, you have a wide range of options for the mid/tweeter amp(s).Unless you manage to find a set of amps that have exactly matching gain levels, you'll probably need a means of attenuating the signal to the bass or mid/tweeter amp-- preferably the bass amp to avoid complicating the signal path to the amp on the M/T.This solution also gives you the capability to fine tune the level of the woofers relative to the mid/tweeter much the same way as do the various VSA Aktive series of speakers.Best,Robert
Do not forget that it is not the most powerful amplifier that must be attenuated, it is the amplifier with the highest input sensitivity. Check our the input sensitivity rating on the Bryston and your proposed tube amps. If they are the same, then only the amplifier's gain structure will dominate, and the higher power amplifier may indeed be the one that will need the attenuation. However, in many cases, the tube amplifier is more sensitive at the input, and even if the tube amp has 50 watts while the Bryston amp has 200 watts, you would need to attenuate the tube amp as it will get loud very quickly, while the Bryston might be just getting enough juice to play, but not quite as loud as the tube amp.So, what you need to find are 1) Input sensitivity in mV, and 2) gain of amplifier in dB. If the Bryston amp requires the attenuation, you should call Dusty at CIAudio and get one of his attenuators that use an Alps pot. They're low in cost but work very well. If you order a unit from him with a set of switchable resistors instead of pots, the cost will be much higher but would be worth the money if you need to attenuate the tube amp, since a switched resistor sounds much better than a potentiometer (all else being equal).Have fun!
Albert,I would like your recommendation for a great tube amp to match the Kismet extreme amps Klaus is building for me. I hadn't really planned on Bi-Amping the Vr4jr's, but now that I have spent a few weeks reading and trying to understand, I am thinking what the hell, why not. I think that the Odyssey Kismets and the 2 V-10 Shockwaves are going to handle super fast, explosive bass. Now I want to have equally impressive results with the Mids and Treble. What are your thoughts? I know it is important that they match well.
StereoNut,How are the experiments with biamping your VR-4's going?Albert
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