parasound 3500 verses parasond jc1

I have to disagree with Downunder, I have heard the JC-1 at a friends house multiple times and owned the SIM W-5, and there is no comparison in my mind. The bass authority and the 25watts of Class A make for a very musical amplifier, versus the detailed stark presentation with lite bass (sorry it couldn't drive or control my NHT 3.3's (4-6ohm speaker) to 21hz.

The JC-1 is more refined than the 3500 or two 3500's

"You are never going to get the 3500 as smooth as the JC-1s due to the devices as well as the layout."

Bob - I have to repectfully disagree. These things can all be fixed with the right mods. The 3500 and JC-1's end-up very close IMO. The 3500 has replaced rectifiers in it, although this seems to mostly improve the bass tightness.

Steve, we are talking about different things.......The IR devices that need to be repaced with Harris are not rectifiers, they are Mosfets used in the input section and this is the cause of the huge amount of 2nd harmonic distortion in the 3500 over the JC-1.......This amount of 2nd harmonic comes across as brightness in the upper midrange which can be tamed with two parts and about ten minutes of work.........The Harris diodes used as rectifiers in all three bridges in the 3500 will allow for improved bass tightnesss as well as a much better stage......

Bob Crump
CTC Builders

bob what 2 parts can i replace.and im running the legacy focas with arcls3 b

I'll get with John later in the day and post the number as easier than tearing the top off my 3500 :-) Funny thing is the Harris is the second source for the Mosfets as they are IR/Fairchild parts, but they don't exhibit the weird behavior and brightness of the IR/Fairchild parts......

Bob Crump
CTC Builders