[Solude]

Define hot?  My First Watt runs hot, my B22 is very warm and my GS-X would be simply warm.  If you can keep your hand on it forever, I wouldn't worry about it.  The amp might run warmer the DAC couldn't care less.
 
My First Watt though is don't leave anything you want back hot, no stacking the PWD2 on that

 

[Chris J]

Anyone tried mismatching the inputs and outputs to see if they hear a subjective difference?  Just curious.

Also, I'm aware about this amp running hot.  Bad idea to stack my DAC on top of it?  It will have rubber feet that will give it a few mm of lift

 

Put the hottest piece on top.
In your case, you probably want the Amp on top.

 

[Solude]

Might look funny on top of the 10x7x2 Yulong  Putting it over the Bryston on the power supply side pushed to the rear, should be harmless.

 

[Olias of Sunhillow]

Quote:

Originally Posted by R-Audiohead /img/forum/go_quote.gif
 
Also, I'm aware about this amp running hot.  Bad idea to stack my DAC on top of it?  It will have rubber feet that will give it a few mm of lift
 

 
I would not characterize the BHA-1 as running hotter than my other amps. I don't personally feel that stacking gear is ever optimal, but I wouldn't consider it harmful or dangerous in this case.

 

[Chris J]

When all else fails, read the manuals!

 

[Maxvla]

Depends on the location. Even free standing mine gets kind of toasty since it's in the corner of my room on my desk. It's like a desk heater...

 

[R-Audiohead]

Thanks for the feedback.
 
Yes, stacking the BHA-1 on top of the Yulong wouldn't work out too well.  Maybe I'll build some sort of rack to give them more space...
 
I'll likely end up following Solude's advice at first.
 

 

[MorbidToaster]

I just add some of your typical cork + rubber isolation lads between them. Gives about and inch clearance and with a case heat sink unit like the Bryston it'd be fine.

 

[James Tanner]

PERFECT
 
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[longbowbbs]

Quote:

PERFECT
 
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Word!  

 

[jtinto]

Quote:

PERFECT
 
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[Chris J]

Quote:

PERFECT
 
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Looks about right! 
Not too sure if I should do this  

or this 

 or this

 or just 

!

 

[Solude]

Quote:

Spoke with Engineering - Specs on BHA
 
 
TYPICAL BHA1 HEADPHONE AMPLIFIER PERFORMANCE
 
SETUP - SINGLE ENDED INPUT @ 1V  - DISTORTION MEASURED  20HZ TO 20 KHZ
 
LOAD 600 OHMS
GAIN HI - 10.9V OUT @ 001%   POWER 200 mW
GAIN LO - 5.45 V OUT @ 001%  POWER 50 mW
GAIN LO - 2.50 V OUT @ 001%  POWER 10 mW
GAIN LO - 788m V OUT @ 001%* POWER 1 mW
 
LOAD 300 OHMS
GAIN HI - 10.8 V OUT @ 001%   POWER 390 mW
GAIN LO - 5.40 V OUT @ 001%  POWER 50 mW
GAIN LO - 1.79 V OUT @ 001%  POWER 10 mW
GAIN LO - 583 mV OUT @ 001%* POWER 1 mW
 
LOAD 80 OHMS
GAIN HI - 10.4 V OUT @ 002%   POWER 1.35 W
GAIN LO - 5.20 V OUT @ 001%  POWER 383 mW
GAIN LO - 887 mV OUT @ 001%  POWER 10 mW
GAIN LO - 345 mV OUT @ 003%* POWER 1 mW
 
LOAD 32 OHMS
GAIN HI - 9.65 V OUT @ 0.150%   POWER 2.9 W - onset of clipping
GAIN LO - 4.84 V OUT @ 002%     POWER 732 mW
GAIN LO - 578 mV OUT @ 001%*  POWER 10 mW
GAIN LO - 185 m V OUT @ 005%* POWER 1 mW
GAIN LO - 4.00 V OUT @ 001%     POWER 500 mW - rated output
 
*= 80 KHZ FILTER
  mW = milliwatt
W = watt
mV = millivolt
V = volt

 
Input is listed as single ended but I believe these are the balanced out numbers.  Similar to original GS-X numbers.  Just looking for confirmation since there are two transformer numbers being thrown around, 30VA and 50VA.  I believe 50VA is correct.

 

[James Tanner]

How do I access private messages?
 
james

 

[Solude]

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