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In Reply to: Interesting write up of Parasound JC 1 Monoblocks posted by Jeff Starr on August 31, 2002 at 06:41:36:
The JC-1 project has been ongoing now for almost three years using the HCA-3500 as the prototype for changes in the circuit and parts. We got the HCA-3500 to sing pretty well and used it at the CES a couple years ago and Richard Schram, head of Parasound, approached us to turnkey the JC-1 project as respects electical design, board design and parts selection. We did the best we could in design and implementation of a very powerful amplifier that can be machine built at an attractive price. I chose all the parts, wires and connectors and Parasound didn't say a word, but got out their checkbook and wrote lots of large checks for probably the fanciest parts used by anyone. The tweakers won't like the amp at all as we have already done everything they normally would consider such as Nichicon Gold Tune and Muse KZ series caps, Harris Hyperfast Soft Recovery Diodes in all the full wave bridges, direct gold plated OFC Vampire connectors, CCC wiring and the list goes on and on.....Carl Thompson's layout is just extraordinary and S/N measures 122dB using just the board and not a ton of buss bar as is normally found in most amps.....The project was a blast and we appreciate Richard Schram funding the project as this is so unlike anything Parasound has ever built before....We'll see what the inmates and reviewers have to say about these amps in the coming months, but I for one am pleased with them....
Follow Ups:
If you by a pair of A23's and run them bridged mono, are you getting close to the JC1 performance?
Unfortunately, you get what you pay for. The other Halo Parasound amps only get my design contribution, shared with Taiwan engineers' attitude toward parts, construction, etc. The A23 is still a good amp in principle, but we have put a lot more attention into the JC-1.
Mr. Crump,What about the upcoming A51--series "1" multichannel amplifier (250/400 watts per channel x 5), does it share more of the design and sound qualities of the JC1? Was CTC more involved in this amplifier? I am very impressed with the JC1 and wondering if the A51 offers similar performance and build quality withstanding obvious power restriction for 5 channels in one chassis? They look to share a similar chassis, will the A51 give "similar" performance as the JC1 only x 5? Is the A51 as far as CTC can take a multichannel design?
Thanks.
just as Hondas and Porsches are both cars......If you want five channel sound like the JC-1 then buy five JC-1s :-) It even has all the video turn on/off stuff built in so you can adjust so all five don't come on at the same time and pop breakers....Ground lift switch is included as well on the JC-1.....Just don't expect the A51 to go around corners as fast as the JC-1 keeping in mind five of those retail for $15,000......
If you were to tweak the A23 and the P3 what would you do to them?
Three means third class. Cheap product. Not necessarily bad product, just very cost effective.
...does that mean we can expect something in between 1 and 3?
Oh, youse guys...
Actually there is a 2'nd tier product. I don't know if it is released yet. These releases parallel the HCA-1000 (3rd), HCA-1500 (2nd), and the HCA-3500 in the previous releases, with improvements.
Is it $3,000 for each or for a pair?
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