The Black Hole......

[simon7000]

They measured it at 4 volts, what source to a preamp is 4 volts?

 

[billshurv]

Parasound Halo JC 2 line preamplifier Measurements | Stereophile.com



I do wonder why ASR didn't try a bit harder to replicate the stereophile results. Or even email JA with some questions.

 

[nicoch58]

John avoid asr forum is a bad place

 

[Bonsai]

I looked at the Stereophile measurements and it looks to me to be a pretty nice preamp.

You can nitpick these things to death and while I consider myself an objectivist (small ‘o’ please note), to discount a pre just on measurements (that are good IMV) seems churlish.

 

[cbdb]

I think The measured units are different, ASR measured a JC2 stereophile the JC2 B.

 

[cbdb]

John avoid asr forum is a bad place

Yea too much science.

 

[Evenharmonics]

Those of you who can hear the difference, I recommend that you trust your ears.

While peeking or without peeking?

Those of you who don't trust your ears, or really can't hear any different, go for specs, features, and price.

Aren't you forgetting the looks?

 

[john curl]

Peeking of course!

 

[gpapag]

Thank you George.

Bill, follow the first ten minutes. It will feed your curiosity.
Pioneer SM-G204B Stereophonic Receiver. A look at this amazing receiver. - YouTube

George

 

[billshurv]

George: That is amazingly bonkers.

 

[nicoch58]

Yea too much science.

Only stupid place if HE cannot understand the Diyaudio Kit Amp Camp Amp !

 

[PMA]

Parasound Halo JC 2 line preamplifier Measurements | Stereophile.com



I do wonder why ASR didn't try a bit harder to replicate the stereophile results. Or even email JA with some questions.

I do not care about 0.003%/1kHz, no one would hear it, but -

This is very bad and poor
https://www.audiosciencereview.com/...-n-vs-frequency-audio-measurements-png.74050/

for a preamp.

I do not understand how it could be designed or produced so badly.

 

[billshurv]

Hi Pavel. Long time no see! How have you been keeping?

 

[PMA]

Little bit bored by audio discussions . But this was awakening.

I got much better result from Parasound P5 preamplifier

Model Halo P5 << Parasound

 

[morinix]

ASR doesn’t actually listen to most of the gear they review. Deaf guys with expensive measurement gear.

 

[gpauk]

I'd laugh, but you are probably serious...

 

[billshurv]

Hmm on the balance between

Copla has an optically isolated power supply for low noise, allowing liquid, cohesive midrange and deep soundstaging

vs the in detail analysis of the technique (and proof it doesn't work) from SYN08 I'm with the guy with expensive measurement gear.

 

[scottjoplin]

I'd laugh, but you are probably serious...

That's all the more reason to laugh, I find DT very funny.

 

[jjasniew]

"Copla has an optically isolated power supply for low noise"... I wonder how that works?

The only optically isolated power supply I've ever heard of is in IsoVu Isolated Probes | Tektronix. Apparently, they shoot a laser along a fiber up into the probe, then use that energy to make DC to power the probe's amplifier - who's signal is conveyed back via another optical fiber.

 

[billshurv]

Couple of LEDs and a PV cell.