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New headphone amplifier from Bryston - Page 51

post #751 of 1488
Quote:
Originally Posted by Chris J View Post

 

The SE output is simply one half of the balanced output.

The BHA- 1 is designed to drive headphones either SE or balanced witout any special tricks or compromise.

Got this right off the schematic.

If people prefer this amp with balanced output, what can I say? They like what they like! biggrin.gif

 

 

BTW, the manual states that this amp outputs 6 Watts per channel into 32 Ohms.

 

It states Maximum 6W...

 

Here's some number quotes http://bryston.com/products/power_amps/BHA-1.html

 

 
Load @ 600 Ohms:
Hi - 10.9V Out @ 001% Power 200 mW
Lo - 5.45 V Out @ 001% Power 50 mW
Lo - 2.50 V Out @ 001% Power 10 mW
Lo - 788 mV Out @ 001%¹ Power 1 mW
 
Load @ 300 Ohms:
Hi - 10.8 V Out @ 001% Power 390 mW
Lo - 5.40 V Out @ 001% Power 50 mW
Lo - 1.79 V Out @ 001% Power 10 mW
Lo - 583 mV Out @ 001%¹ Power 1 mW
 
Load @ 80 Ohms:
Hi - 10.4 V Out @ 002% Power 1.35 W
Lo - 5.20 V Out @ 001% Power 383 mW
Lo - 887 mV Out @ 001% Power 10 mW
Lo - 345 mV Out @ 003% Power 1 mW
 
Load @ 32 Ohms:
Hi - 9.65 V Out @ 0.150% Power 2.9 W²
Lo - 4.84 V Out @ 002% Power 732 mW
Lo - 578 mV Out @ 001%¹ Power 10 mW
Lo - 185 m V Out @ 005%¹ Power 1 mW
Lo - 4.00 V Out @ 001% Power 500 mW³

Edited by ardilla - 12/21/12 at 12:53pm
post #752 of 1488
Quote:
Originally Posted by ardilla View Post

 

It states Maximum 6W...

 

Here's some number quotes http://bryston.com/products/power_amps/BHA-1.html

 

 
Load @ 600 Ohms:
Hi - 10.9V Out @ 001% Power 200 mW
Lo - 5.45 V Out @ 001% Power 50 mW
Lo - 2.50 V Out @ 001% Power 10 mW
Lo - 788 mV Out @ 001%¹ Power 1 mW
 
Load @ 300 Ohms:
Hi - 10.8 V Out @ 001% Power 390 mW
Lo - 5.40 V Out @ 001% Power 50 mW
Lo - 1.79 V Out @ 001% Power 10 mW
Lo - 583 mV Out @ 001%¹ Power 1 mW
 
Load @ 80 Ohms:
Hi - 10.4 V Out @ 002% Power 1.35 W
Lo - 5.20 V Out @ 001% Power 383 mW
Lo - 887 mV Out @ 001% Power 10 mW
Lo - 345 mV Out @ 003% Power 1 mW
 
Load @ 32 Ohms:
Hi - 9.65 V Out @ 0.150% Power 2.9 W²
Lo - 4.84 V Out @ 002% Power 732 mW
Lo - 578 mV Out @ 001%¹ Power 10 mW
Lo - 185 m V Out @ 005%¹ Power 1 mW
Lo - 4.00 V Out @ 001% Power 500 mW³

 

Yes, I've seen that. But thanks for the link.

Unfortunately the manual does not explicitly state the distortion at 6 Watts @ 32 Ohms.

At this power level, output voltage is still only 13.8 Vrms, i.e. 20 Volts peak, 40 Volts pk-pk.

Output current is 433 mAmps rms.

So this may be referring to current clipping......just a SWAG on my part! wink_face.gif


Edited by Chris J - 12/22/12 at 8:31am
post #753 of 1488
James,

I am really enjoying my BHA1 with my Grado PS1000 fed from the 4 pin single balanced. I am now feeding a nice pair of NHT pro monitors from the balanced XLRs as well. As my BHA1 was purchased in early 2012 it does not have the rear XLR outputs - what would be the upgrade cost to add these to my BHA1 ? I am assuming the sound quality is exact same as front XLR outputs - so mainly an aesthetic thing. Thanks for any feedback.
post #754 of 1488
Quote:
Originally Posted by sbleam View Post

James,
I am really enjoying my BHA1 with my Grado PS1000 fed from the 4 pin single balanced. I am now feeding a nice pair of NHT pro monitors from the balanced XLRs as well. As my BHA1 was purchased in early 2012 it does not have the rear XLR outputs - what would be the upgrade cost to add these to my BHA1 ? I am assuming the sound quality is exact same as front XLR outputs - so mainly an aesthetic thing. Thanks for any feedback.

Hi sbleam

 

Not sure what the price would be as the chassis would need changing I think - email Mike Pickett at Bryston and he should be able to give you an idea.

mpickett@bryston.com

 

I have used the Grado 1000's at a number of audio shows with the BHA-1 and they are a big hit gs1000.gif

 

james

post #755 of 1488
Quote:
Originally Posted by sbleam View Post

James,
I am really enjoying my BHA1 with my Grado PS1000 fed from the 4 pin single balanced. I am now feeding a nice pair of NHT pro monitors from the balanced XLRs as well. As my BHA1 was purchased in early 2012 it does not have the rear XLR outputs - what would be the upgrade cost to add these to my BHA1 ? I am assuming the sound quality is exact same as front XLR outputs - so mainly an aesthetic thing. Thanks for any feedback.

Did you ever compare the PS1000 single ended to balanced? I am considering making that switch. What is the difference?

post #756 of 1488
Quote:
Originally Posted by BlackstoneJD View Post

Did you ever compare the PS1000 single ended to balanced? I am considering making that switch. What is the difference?

 

Yes - go with the Balanced out as it gives you twice the voltage swing as single ended.  

 

james

post #757 of 1488
Quote:
Originally Posted by James Tanner View Post

 

Yes - go with the Balanced out as it gives you twice the voltage swing as single ended.  

 

james

 

Hi James,

 

I guess one of English reviews is from the December 2012 issue of Hi Fi News?

 

post #758 of 1488
Quote:
Originally Posted by Chris J View Post

 

Hi James,

 

I guess one of English reviews is from the December 2012 issue of Hi Fi News?

 

 

Thanks!

 

james

post #759 of 1488

BlackStoneJD,

 

Yea the balanced was much more powerful sound -- my only problem --- just to powerful. I rarely get above 8-9 o'clock when listening on the Grado's. I can run the pair of monitors above and still have enough power for my PS1000, but the sound is excellent for both. I just cannot see anyone getting the BHA1 above 10-11 o'clock -- at least I have not on anything I own (headphones or monitor speakers).

 

James - thanks for the tip I will email Mike Pickett -- but if you are right -- likely not worth th cost. Just keep the cables all clean up front for the monitors bigsmile_face.gif !

 

Shawn

post #760 of 1488

What do you have the gain switch on High or Low?

post #761 of 1488

It only has a high and damn high setting :P 5x, 10x, 10v into a can that gives 98dB at 1mW is ouchies ;)

post #762 of 1488

Yeah but low gain setting into that same "can" is much more pleasant than the Mjolnir.

post #763 of 1488
Quote:
Originally Posted by Solude View Post

It only has a high and damn high setting :P 5x, 10x...

Very true. But still I found it great with the HD650 with the volume at 8:30 smily_headphones1.gif
post #764 of 1488
Sound is much better with volume at 12:00
Therefore you should use a preamp for the Bryston, to use a lower signal and turn the power-control to 12:00
Edited by Hubert481 - 12/25/12 at 10:46pm
post #765 of 1488
Quote:
Originally Posted by Hubert481 View Post

Sound is much better with volume at 12:00
Therefore you should use a preamp for the Bryston, to use a lower signal and turn the power-control to 12:00

Why would it sound better with the volume at 12:00?
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