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New headphone amplifier from Bryston - Page 60

post #886 of 1427

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 :(

post #887 of 1427
Quote:
Originally Posted by R-Audiohead View Post

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.
post #888 of 1427

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.

post #889 of 1427
Quote:

Originally Posted by R-Audiohead View Post

 

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.

post #890 of 1427

When all else fails, read the manuals!

post #891 of 1427
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...
post #892 of 1427

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.
 

post #893 of 1427
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.
post #894 of 1427
post #895 of 1427

 

Word!  biggrin.gif

post #896 of 1427
post #897 of 1427

 

Looks about right! 

Not too sure if I should do this  angry_face.gif or this confused_face_2.gif or this frown.gif or just tongue.gif!

post #898 of 1427
Quote:
Originally Posted by James Tanner View Post

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.

post #899 of 1427

How do I access private messages?

 

james

post #900 of 1427

Top right of any Head-Fi page.

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