John Curl's Blowtorch preamplifier part II

[scott wurcer]

Scott , monobloc version ....

Sutherland Engineering Phono Block monoblock phono preamplifier Page 2 | Stereophile.com

Checked their site, nothing but 8-legs on the board. I'm still using 3 legged Toshiba high hats, I must be out of date.

I'm not pulling your leg, I have not used anything but open-loop JFET diff pairs for phono for over 20yr.

 

[Joachim Gerhard]

http://www.humblehomemadehifi.com/download/ClarityCap_Technical_Report.pdf

 

[Joachim Gerhard]

Sutherland Engineering Phono Block monoblock phono preamplifier Measurements | Stereophile.com
Signal noise is meager, so is the overload margin.

 

[a.wayne]

Checked their site, nothing but 8-legs on the board. I'm still using 3 legged Toshiba high hats, I must be out of date.

I'm not pulling your leg, I have not used anything but open-loop JFET diff pairs for phono for over 20yr.

I'm sure JC will pop a cork over such .....

 

[a.wayne]

Sutherland Engineering Phono Block monoblock phono preamplifier Measurements | Stereophile.com
Signal noise is meager, so is the overload margin.

Ok , here ..
Vitus Audio MP-P201 Masterpiece Series phono preamplifier | Stereophile.com


Scotty, this Dread no have no fortyleg in a him head ...

 

[jacco vermeulen]

I have not used anything but open-loop JFET diff pairs for phono for over 20yr.

Tar and feathers.

 

[Joachim Gerhard]

This Vitus is sure an enigma. The Boulder with 60dB S/N on the MC input must be a joke too.

 

[Joachim Gerhard]

60 dB deathly quiet ?

 

[hitsware]

> However, there are an awful lot of decimal point
> shifts between squeezing the cap with a vice or
> pliers, and acoustic pressures within a closed
> enclosure placed in a room where humans can
> survive the spl.

Decimal points may lessen, but not negate
the effect...........

 

[a.wayne]

60 dB deathly quiet ?

No 76.5 dB was deathly quite .....

 

[scott wurcer]

Ok , here ..
Vitus Audio MP-P201 Masterpiece Series phono preamplifier | Stereophile.com


Scotty, this Dread no have no fortyleg in a him head ...

LOL, you take Fremer's ravings seriously? Well until the next one comes around.

"while the Vitus MP-P201 Masterpiece is well engineered, there is nothing in its measured performance that would indicate why Michael Fremer was so taken by its sound quality.—John Atkinson"

The SNR was OK but the distortion spectra were the shites for SS, my open-loop circuit does better.

 

[wayne]

The Clarity MR are a good sounding cap especially in speakers. For low level the Rel RT polystyrene have my vote now if they only shrank them and made SMT versions.

 

[john curl]

Many thanks Joachim for your input. I needed that input, and it may save me months of effort, if I were inclined to go in that direction of measuring vibration sensitivity. They found the same thing in 1985(or so), in HFN.

 

[john curl]

The JC-3 does significantly better than either, and the Vendetta is 10dB better than the JC-3. Doesn't anyone know what can be done?

 

[vacuphile]

The Clarity MR are a good sounding cap especially in speakers. For low level the Rel RT polystyrene have my vote now if they only shrank them and made SMT versions.

You probably couldn't solder them since the polystyrene would turn into a gooey mass at smd soldering temperatures, even non-rohs.

 

[fas42]

Zep "two" at 11.

CCR at 6.

Just got back from Illinois, lock the front door oh boy.
Got to set down, take a rest on the porch..

jn

One of the early experiences, decades ago, that made it painfully obvious how laughably incompetent the vast majority of audio playback was, was playing the original Led Zeppelin I CD at decent SPLs, when my system was in good tune. A quite wondrously overwhelming creation, with a depth that seemed to extend for miles - hearing the grotesque, squashed mess that emerges from most systems makes is almost impossible to conceive that it is the same recording ...

 

[scott wurcer]

was playing the original Led Zeppelin I CD at decent SPLs, ...

We did that no CD but LP in 1970, wall of squall and no one gave a s**t. Zero dynamic range and the louder the better.

 

[fas42]

LOL, you take Fremer's ravings seriously? Well until the next one comes around.

"while the Vitus MP-P201 Masterpiece is well engineered, there is nothing in its measured performance that would indicate why Michael Fremer was so taken by its sound quality.—John Atkinson"

Well, it might be worth taking it just a little bit seriously ... have just read the first page it sounds very familiar - not as something that somebody like Fremer might say - but as what transpires when a system snaps into correct focus. If you've never experienced such it might seem absurd, but that's the subjective impact of it happening - you just stand there, gaping at the sound, saying "I don't believe this!" ..

 

[a.wayne]

With legalize it in full swing , zep and the likes could bring back that squal ..

 

[a.wayne]

John's turn ...

Parasound Halo JC 3 phono preamplifier Measurements | Stereophile.com

looks like JC GOT your chips to work Scotty ...

In a conversation I had with him in the 1990s, speaker designer Dave Wilson, of Wilson Audio Specialties, described John Curl as "the master of low-level signal amplification....