The Wire - Low Power Ultra High Perfromance (LPUHP) 16W Power Amplifier - Page 3

bada bing · 9th January 2012, 08:12 AM

2 x PCB here.
Looks like a nearly perfect tweeter driver.

HYPERTUNE · 9th January 2012, 08:18 AM

Assuming the kits haven't shipped yet, I'd be interested in a pair of boards.

1543 · 9th January 2012, 11:53 AM

If it would be possible to drive 4 Ohm speakers with this amp (I guess not) I would be in for 2 kits.
1543

qusp · 9th January 2012, 11:56 AM

with reduced power i would think yes, considering it likely has basically zero output impedance

mwmkravchenko · 9th January 2012, 12:12 PM

Me thinks I have to go visit the wizard!

maravedis · 9th January 2012, 12:39 PM

count me in for 4 boards please

jazzm · 9th January 2012, 01:40 PM

I'll take 2 kits

bear · 9th January 2012, 01:49 PM

Why not bridge the buffers, and make a bridged amp?
Or will that exceed the max voltage and current ratings for the devices?

_-_-bear

PS. have you tested or sim'd the unit into reactive loads?

hochopeper · 9th January 2012, 01:55 PM

opc, I just had a chance to have a better look at the measurement graphs, I don't know if this reflects badly on me or not but ... I have one huge smile after looking them over. Look forward to bringing a pair to life.

One question I had was, why does the THD fall off a cliff at around 10kHz in the measurements at 10W when at other output powers it increases with freq.? Is it just because you're well into that un-measurable realm?

qusp · 9th January 2012, 01:58 PM

yeah like he said, the THD in particular, hes measuring the Audio precision systems own distortion, the amps distortion does not figure in the graphs

9th January 2012, 12:12 PM	#25
mwmkravchenko Mark Kravchenko --- www.kravchenko-audio.com diyAudio Member Join Date: Jan 2002 Location: Perth Canada	Me thinks I have to go visit the wizard! __________________ Mark

9th January 2012, 01:49 PM	#28
bear expert in tautology diyAudio Member Join Date: Apr 2002 Location: New York State USA	Why not bridge the buffers, and make a bridged amp? Or will that exceed the max voltage and current ratings for the devices? _-_-bear PS. have you tested or sim'd the unit into reactive loads? __________________ _-_-bear http://www.bearlabs.com [...2SJ74 Toshiba bogus asian parts - beware! ] -- Btw, I don't actually know anything, FYI --

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9th January 2012, 08:12 AM	#21
bada bing diyAudio Member Join Date: Aug 2009	2 x PCB here. Looks like a nearly perfect tweeter driver.

9th January 2012, 08:18 AM	#22
HYPERTUNE diyAudio Member Join Date: May 2006 Location: Sydney	Assuming the kits haven't shipped yet, I'd be interested in a pair of boards.

9th January 2012, 11:53 AM	#23
1543 diyAudio Member Join Date: Jun 2004 Location: Ruhrgebiet	If it would be possible to drive 4 Ohm speakers with this amp (I guess not) I would be in for 2 kits. 1543

9th January 2012, 11:56 AM	#24
qusp is choosing a less facetious title... diyAudio Member Join Date: Oct 2009 Location: Brisbane, Australia	with reduced power i would think yes, considering it likely has basically zero output impedance

9th January 2012, 12:39 PM	#26
maravedis diyAudio Member Join Date: Sep 2009	count me in for 4 boards please

9th January 2012, 01:40 PM	#27
jazzm diyAudio Member Join Date: Jan 2012 Location: Toronto, ON	I'll take 2 kits

9th January 2012, 01:55 PM	#29
hochopeper diyAudio Member Join Date: Feb 2009 Location: Brisbane, Australia	opc, I just had a chance to have a better look at the measurement graphs, I don't know if this reflects badly on me or not but ... I have one huge smile after looking them over. Look forward to bringing a pair to life. One question I had was, why does the THD fall off a cliff at around 10kHz in the measurements at 10W when at other output powers it increases with freq.? Is it just because you're well into that un-measurable realm?

9th January 2012, 01:58 PM	#30
qusp is choosing a less facetious title... diyAudio Member Join Date: Oct 2009 Location: Brisbane, Australia	yeah like he said, the THD in particular, hes measuring the Audio precision systems own distortion, the amps distortion does not figure in the graphs