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Old 22nd August 2013, 12:38 AM   #3831
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Quote:
Originally Posted by flg View Post
Is that a small typo there?
He seemed quite excited. It was probably just an emotional stutter.
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Old 22nd August 2013, 03:49 AM   #3832
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So... I don't get the joke.
What does JLLH refer to or what is it supposed to refer to?
Thanks.
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Old 22nd August 2013, 12:20 PM   #3833
ichiban is offline ichiban  United States
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Quote:
Originally Posted by bassnkeys View Post
So... I don't get the joke.
What does JLLH refer to or what is it supposed to refer to?
Thanks.
It's supposed to be JLH. Hence the reference to stutter & typo.

Refers to a John Linsley Hood.

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Old 22nd August 2013, 12:41 PM   #3834
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by Earthloop View Post
.... A40 monoblocks.
not to push it further off topic ... but does the A40 have low input impedance or something ?

(I suppose the JLH buffer is with BJT and a drives hard load better )
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Old 22nd August 2013, 01:46 PM   #3835
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Just out of interest I was Googling the JLH "Buffer" that the previous post was referring to. It seems an elusive beast.

I wonder if this is the buffer that was being referred to. I think the component values may have changed due to obsolescence.
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Old 22nd August 2013, 02:10 PM   #3836
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Check out this thread from last December.

JLH Buffer - Homage to John Linsley Hood

Cheers

Paul
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Old 22nd August 2013, 02:26 PM   #3837
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I did look at those schematics but I got the impression that they were just variations of the original.
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Old 22nd August 2013, 02:44 PM   #3838
Salas is online now Salas  Greece
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The original simple compound buffer by JLH is a well known circuit. Its a low power mixed genre Sziklai. Higher Ygfs JFETs, more bias through better BJTs and an offset balance trimmer take it further. Expect a different sound than a B1 that may compliment different systems and likings better or not.
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Old 22nd August 2013, 02:58 PM   #3839
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NAD equipment used to suffer a similar degredation in sound. A "PURE" NAD system was supposed to sound very good, but if you only had a few pieces of NAD interspersed with other equipment, the results were often disappointing.

I use the B1 with an Aleph 4 and the results are simply outstanding.

My first foray into the DIY world of amplifiers was with my Dad who built one of the Hart JLH 80W Mos-Fet kits. It's still in the loft somewhere but I remember that the sound was somewhat muddied by the regulated PSU. He rebuilt it with an un-reg supply and it was much better. The Pass amps are so much more "Alive" and "Dynamic". Of course loud speakers have come along in leaps and bounds since then too. He was always a B&W man. I can't remember what we had then DM14's I think. I've got his 683's now.

Last edited by KatieandDad; 22nd August 2013 at 03:07 PM.
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Old 22nd August 2013, 03:09 PM   #3840
Salas is online now Salas  Greece
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NP to have released the B1 if it wasn't cutting the mustard when driving at least some of his amps it would have been strange. He is not someone that does not listen to his electronics or lacks critical taste.
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