Twisted Pear Audio - Buffalo32S (ES9018 DAC)

[Russ White]

Originally posted by Solve
Sorry for an newbie question but, it is possible to use ESS 32 with customizable filter and use it as an two way active filter?
Let say fiter it at 2khz?

It is technically possible, but the results would not be ideal. It not really designed for filters lower than say fs/2.

Cheers!
Russ

[Russ White]

I would not exceed 15V supplies as things would start to run very very hot.

12V batteries would work nicely, and I see no reason not to try them.

You could even use a 6V battery for VD. Just don't exceed 7.5V or so or the 1.2V regulator will get pretty hot. 4.5-5V would be more ideal.

Cheers!
Russ

[Nielsio]

Seems like my package is 'stuck' in customs.

Detailed Results:

Bullet Into Foreign Customs, May 15, 2009, 11:21 am, NETHERLANDS
Bullet Arrived Abroad, May 15, 2009, 11:21 am, NETHERLANDS
Bullet International Dispatch, May 12, 2009, 8:28 am, ISC NEW YORK NY(USPS)
Bullet Arrival
Bullet Processed through Sort Facility, May 11, 2009, 6:04 pm, NORTH READING, MA 01889
Bullet Electronic Shipping Info Received, May 10, 2009

I read elsewhere on the web that I might expect a letter to send them the original invoice so they can determine the tax rate; but this depends on the kind of documentation that came along with it.

Have other packages been sent to Holland, or maybe shipments of other kits?

[BrianDonegan]

Originally posted by Nielsio
Seems like my package is 'stuck' in customs.



I read elsewhere on the web that I might expect a letter to send them the original invoice so they can determine the tax rate; but this depends on the kind of documentation that came along with it.

Have other packages been sent to Holland, or maybe shipments of other kits?

Several went to Holland. Send me email.

[Nielsio]

Mail sent to orderstatus@tw..

[Javin5]

Originally posted by mikelm

My guess is batteries will be worth trying

I know that batteries have a certain audiophile reputation. However, be aware that their output impedance is generally quite a bit higher than what you can achieve with a conventional supply and a good regulator. It also varies, depending on the charging status. The noise is usually also higher. In other words, you still need a good regulator.

To utilize the potential advantages of a battery supply, you should switch off all AC circuitry when the DAC is in use, and automatically charge the battery when the DAC is not in use. This way the battery would supply power for both the analog and digital sections, no static or magnetic ac-strayfields would be present. Depending on the battery, you should get a couple of hours playtime, before a recharge would be required. I have seen this concept realized in the DAC of a german supplier. Using batteries only for the analog section is, in my opinion, a halfway solution.

Kurt

[jkeny]

Originally posted by Javin5
I know that batteries have a certain audiophile reputation. However, be aware that their output impedance is generally quite a bit higher than what you can achieve with a conventional supply and a good regulator.

Paralleling batteries is said to result in higher current/lower impedance & lower noise!

Slarti,
Here's a guy who uses batteries on the old Buffalo board http://theartofsound.net/forum/showp...0&postcount=48

[solarstabi]

Here it is, with latest mods:
1. Analog & digital earths joined.
2. Output tracks cut to enable 22 ohm resistors.
Box is diecast aluminium from Altronics (kit electronics supplier here in Melbourne)
http://web.mac.com/strideg/iWeb/Site/Photos.html

[BrianDonegan]

Buffalo32S Manual V1.0 posted:

http://www.twistedpearaudio.com/docs...32s_manual.pdf

[secretriches]

I'm in process of building a single-ended cathode follower stereo 3 w/ch amp from Transcendent Sound (pp using downloaded plans). I also received a 32S from the last buy and am putting it together. I've noticed that some of you are running directly from your computer to the 32S and then to a stereo (or two mono bloc) SE power amp(s) without the use of a preamp.

Could anyone share whether a preamp would be needed. I have no interest in any other music source than my Mac Mini so 1 input is all that I need. I'll be connecting via optical output on the Mac to Toslink on the 32S. My speakers are 94db single driver Fostex 166E. If I add a volumite to the 32S, would that be adequate to control volume and avoid the need for a separate preamp? One limitation might be the standard pot on the volumite?

If going without a preamp works, wouldn't then adding a passive transformer attenuator take the volumite to a higher quality level? Here's a link to a reasonably priced entry level passive preamp that might work:

http://www.diyhifisupply.com/?q=cata...sc&order=Price

Am I heading in the right direction or am I missing something here?