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If i had the money.....

I'd be ordering a set of the Parasound Halo JC-1 Monoblocks. I knew that these were going to be good, but i didn't know just HOW good. I've talked to a few people that have them and the "reviews" of these end users is just as strong as the recommendation that these amps receive in the February Stereophile.

Hard to imagine beating a product that was designed for optimum linearity / performance by an audio legend, laid out by an RF engineer in order to maintain consistent impedances throughout the entire circuit and then building the circuit with each part hand picked to "voice" the unit for optimum sonics by a "tweaker". The total approach to product building for $6K a pair !!! All of this with POWER to spare !!!

THD is predominantly all second harmonic i.e. not the typical odd order that most SS amps generate.

IMD of .0015 !!! Keep in mind that distortion typically goes up quite noticeably as power is raised and impedance lowered. This figure was taken at 4 ohms and at 600+ watts of output !!!

Output impedance of no higher than .06 ohms. This amp should keep the same "voice" and stability into just about any speaker. The power output verifies the stability and "robustness" of the circuit also....

Rated at 400 wpc @ 8 ohms

Power at clipping, broad band signal steady state:

8 ohms: 545 watts

Power at clipping, pulsed 1 KHz signal:

8 ohms: 586 watts

4 ohms: 1154 watts

2 ohms: 2255 watts

1 ohm: 4200 watts !!!

Any thougths / comments on this one ? Sean
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sean
muralman1
1,527 posts
 
KF- you know this, Apogee Scintilla <1ohms - the one and only.

I'm using two twenty amp dedicated circuits and a Pass Labs 600 to power them. Pass Labs assured me it would only take one 15 amp circuit, but I thought, just to be safe...
fmpnd
481 posts
 
KF, gotta agree that the Lamm M1.1s are special but should point out that they put out 100 watts of pure class A magic into BOTH 8 and 4 ohms. I wish they did double down into 4 ohms!! Here is a quote from the Lamm website:

"Pure Class A hybrid amplifier producing 100 Watts continuous into 8 AND 4 Ohms, 200 Watts continuous into 2 Ohms, 300 Watts continuous into 1 Ohm."

Ciao!

Frank
tok20000's avatar
tok20000
608 posts
 
Oops, ERATA, I mistakenly wrote the LAMMS do 200wpc CLASS A into 4 ohms. LAMM owners only wish, heh heh...

You are right Frank, The LAMMs do 100wpc pure CLASS A into 4 ohms. That is still pretty amazing since most amps cut actual Class A Power by about 75% if ohms are decreased by half. Thus if a typical amp is 100wpc Class A into 8 ohms, the amp would be effectively 25wpc class A into 4 ohms (the rest of the power would be AB).

Please correct me if my understanding is incorrect.

KF
aroc
760 posts
 
Check out the 250lbs Classe Omega. I think it was like something 100wpc class a, 500wpc in a/b. then like 3400wpc into some crazy low impedence. that's nuts.
sean OP
6,231 posts
 
Aroc: I've heard from more than a few folks, including straight from a Classe' dealers own mouth, that the Omega's are not that good sounding. Like anything else though, it is a matter of system synergy and personal preference.

I also had a response typed up to Tok2000 and Twl but it somehow disappeared from my computer. Must have happened when it locked up earlier today. Sean
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