Twisted Pear Audio - Buffalo32S (ES9018 DAC) - Page 9

tailspn · 31st March 2009, 12:35 AM

Looks terrific! I'm looking forward to pre-orders!

dwk123 · 31st March 2009, 01:11 AM

Sweet. I guess that answers the question I was going to ask about whether the volumite would be supported immediately :-)

Russ White · 31st March 2009, 02:42 AM

Hey Folks,

I have to say I can finally sleep after a couple of weeks of sweating Buffalo32S and going over every detail in my head a million times.

Mad props go out to Brian for his incredible prototyping skill. I have to give him the credit he deserves.

He built up that first prototype with no stencil! Now that's awesome.

I am just so glad that its working well.

Cheers!
Russ

sangram · 31st March 2009, 04:15 AM

Looks great, sure it sounds as great too! I'm looking forward to the next round of orders (may give this one a miss). I have only one question - is the popping fixed? Russ, this one is for you as you have the same experience as me. It'd be good to know, and enough of a reason for the upgrade for me.

Luke · 31st March 2009, 06:33 AM

As usual it looks very smart Brian, how does it compare with the old buffalo?

glt · 3rd April 2009, 02:34 PM

You can't do better than the noise figure of the local regulators.

rolls · 3rd April 2009, 03:43 PM

Quote:

Originally posted by glt
You can't do better than the noise figure of the local regulators.

Correct, that is the reason I removed Reg1 and the opamp.

Russ White · 3rd April 2009, 04:20 PM

Because I have had few people ask I thought I would post this here:

Buffalo32S current draw on each supply at suggested input voltage:

VD (5V) ~125ma
V+ (15V) ~68ma (each channel)
V- (15V) ~43ma (each channel)

Cheers!
Russ

Russ White · 3rd April 2009, 09:47 PM

If you like the Buffalo, you guys are going to really like the Buffalo32S.

The power supply arrangement and new routing has helped quite a bit.

There is no audible noise on the outputs.

The AVCC reg is doing a spectacular job.

AVCC is a voltage reference as well as the analog supply. That is why it can be though of as having a poor PSRR, but that is not fully accurate. Because any modulation or noise here while not good will be common mode to the balanced outputs, and will be very effectively canceled later down the line if you use an I/V stage like I do, that is super symmetrical.

In any case my AVCC supply noise should be extremely low, though I honestly don't have suitable gear to measure signals that small.

But what really matters to me is that it sound great, and that means it gets out of the way of the music. This it does very well.

Anyway Brian is sending one off for us to get tested. We should have some numbers to go along with the listening impressions soon.

Cheers!
Russ

sp502 · 4th April 2009, 06:56 PM

New prices have appeared on TwistedPearAudio...

31st March 2009, 02:42 AM	#83
Russ White diyAudio Member Join Date: Jan 2005 Location: Nashville, TN, USA	Hey Folks, I have to say I can finally sleep after a couple of weeks of sweating Buffalo32S and going over every detail in my head a million times. Mad props go out to Brian for his incredible prototyping skill. I have to give him the credit he deserves. He built up that first prototype with no stencil! Now that's awesome. I am just so glad that its working well. Cheers! Russ __________________ Less pulp more juice Twisted Pear Audio.

3rd April 2009, 04:20 PM	#88
Russ White diyAudio Member Join Date: Jan 2005 Location: Nashville, TN, USA	Buffalo32S current draw Because I have had few people ask I thought I would post this here: Buffalo32S current draw on each supply at suggested input voltage: VD (5V) ~125ma V+ (15V) ~68ma (each channel) V- (15V) ~43ma (each channel) Cheers! Russ __________________ Less pulp more juice Twisted Pear Audio.

3rd April 2009, 09:47 PM	#89
Russ White diyAudio Member Join Date: Jan 2005 Location: Nashville, TN, USA	If you like the Buffalo, you guys are going to really like the Buffalo32S. The power supply arrangement and new routing has helped quite a bit. There is no audible noise on the outputs. The AVCC reg is doing a spectacular job. AVCC is a voltage reference as well as the analog supply. That is why it can be though of as having a poor PSRR, but that is not fully accurate. Because any modulation or noise here while not good will be common mode to the balanced outputs, and will be very effectively canceled later down the line if you use an I/V stage like I do, that is super symmetrical. In any case my AVCC supply noise should be extremely low, though I honestly don't have suitable gear to measure signals that small. But what really matters to me is that it sound great, and that means it gets out of the way of the music. This it does very well. Anyway Brian is sending one off for us to get tested. We should have some numbers to go along with the listening impressions soon. Cheers! Russ __________________ Less pulp more juice Twisted Pear Audio.

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31st March 2009, 12:35 AM	#81
tailspn diyAudio Member Join Date: Jan 2003 Location: Boston USA	Looks terrific! I'm looking forward to pre-orders!

31st March 2009, 01:11 AM	#82
dwk123 diyAudio Member Join Date: Feb 2002	Sweet. I guess that answers the question I was going to ask about whether the volumite would be supported immediately :-)

31st March 2009, 04:15 AM	#84
sangram diyAudio Member Join Date: Sep 2002 Location: India	Looks great, sure it sounds as great too! I'm looking forward to the next round of orders (may give this one a miss). I have only one question - is the popping fixed? Russ, this one is for you as you have the same experience as me. It'd be good to know, and enough of a reason for the upgrade for me.

31st March 2009, 06:33 AM	#85
Luke diyAudio Member Join Date: Sep 2001 Location: Wellington NZ	As usual it looks very smart Brian, how does it compare with the old buffalo?

3rd April 2009, 02:34 PM	#86
glt diyAudio Member Join Date: Oct 2004	You can't do better than the noise figure of the local regulators.

4th April 2009, 06:56 PM	#90
sp502 diyAudio Member Join Date: May 2006	New prices have appeared on TwistedPearAudio...

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