Please help tube amp for panels and SS for woofer


I finally had a chance to buy two Wolcott monoblocks, which I plan to use to drive the panels of my ML Prodigy.
The two bridged Bel Cantos which did the job before, will be used to drive the woofers.
Are there any ML owners out there who have done this, using tube amps for panels and SS for the woofers?
I understand that I can run into problems here with the different gain and sensitivity of the two amps.
How do I solve the problem? With an active crossover, and if yes, which one, or is there another solution to my problem?
tekunda

Showing 2 responses by px25

Tekunda, I would head the advice of others and try the Wolcotts by themselves. Unless you use an active x-over, the biamped Prodigies will not sound good with tubes on top and SS on the bottom. In theory, the combo should work. In reality, however, the internal Prodigy x-over will contribute to a muddy midrange since the amps will blend in this region. Without using an active x-over or two identical amps, biamping usually messes up the speaker's midrange. I have sold Prodigys before and usually suggested a solid state big amp. I love tubes, but must admit that big tube amps such as the Cary 211s worked ok, but sounded slow compared to the speakers driven by Krell amps. The more current these speakers get, the more they come to life. Although more sensitive than past designs, the Prodigies still dip down to low impedences that tube amps do not like. You never know, though, until you try. See if you can track down the x-over Martin Logan used to sell with the Monolith. Better yet, give Dave a call at Martin Logan and see what he thinks. Good luck, Patrick
Tekunda, If you chose to biamp, doing so with four Wolcotts would probably be the best decision. Unless you use an active crossover that allows the indivudial amps to directly drive the bass/ panel drives without pushing the signal through an internal crossover, a combination of ss and tube will mess up the midrange on almost any speaker, not just the ML. Since x-overs within the speakers allow for overlap, the midrange tends to suffer from bleed through. Don't get me wrong, the Prodigies can sound great with tubes. If you are just getting into this disease of tweak hi-end audio, you will discover that many ways exist to get great sound. Although I preferred the sound of Prodigies driven by big SS mono-blocks, you might fall in love with the Wolcotts. If the Wolcotts drive the Soundlabs, they should be o.k. with the Prodigys. However, at the recent CES, the Wolcotts were obviously clipping while driving the Soundlabs. The sound wasn't terrible, but definately strained when hit with moderate dynamics and transients. Start with one pair of monos, and if you later feel the need, try another pair. In the end, take the reviews, measurements, and even my advice with a grain of salt and let your ears tell you what the best kind of amplification is for the Prodigy's. Good luck. Patrick