Hi Mark, you should not need any special switching. You might want to take the output for the headphones prior to the output resistors. Or simply jumper them. That's your call. It will drive the D2000's with no issues. Cheers! Russs

Actually it could do either SPDIF, I2S or DSD. If you like more SPDIF inputs you can simply add the MUX and use I2S input. You also gain isolation this way. Cheers! Russ

To Get incredible sound you only need 4 modules: 1) Buffalo II + Placid $289 2) IVY III + Placid BP $139 Then you will need two transformers about $42. So all the major parts will be about $470 The rest is just switches, jacks, and wiring bits. For $30 more you get the Volumite...

Quote: Originally Posted by Beefy In my humble experience, the original Buffalo24 is much less reliable at obtaining/keeping SPDIF compared with I2S. This was actually a flaw in the ES9008. The ES9018 is much better in this regard. Cheers! Russ

Basically in Dual Mono the SE output from the selected channel (lets say left) will be in phase, and the SE output from the opposite side (lets say right) would be opposite phase. You take them both and you have a single balanced channel. If you want SE you can add a Ballsie lite, or just take...

The IVY III is the same size as the BUF32S, which is to say 2x the width of the Buffalo II but the same length. It has mounting holes that are aligned with the Buffalo II holes so that the Buffalo II can mount easily on top of the IVY III. The Buffalo II outputs also exactly align with the...

You read correctly. IVY III is basically two IVY II plus a Ballsie Lite on one PCB. Its designed so that you can power each section independently or with a single bipolar supply. Cheers! Russ

The DAC module itself supports left/right balance, as you send the volume level independently to each channel via I2C. The volumite only has a single pot, so it adjusts both left and right at the same time. The AC1 application/firmware I am using supports L/R balance as well as mute and...

Quote: Originally Posted by prinz i wonder how about comparison between Buffalo and WM8742 DAC.. Ł. Fikus called them equal.. The WM8742 is the budget version of the WM8741. The performance is not bad, but certainly not near as good as its big brother the WM8741. A quick side...

Nice!!! Very very cool.

Hey guys, this was the very first batch of these PCBs. This is the batch we used for prototypes. There is no way we could get huge quantities of an untested board. The next batch will be much larger and not long in coming. We are talking weeks not months. Now that we know the PCB/Circuit...

Hey guys, Just a note about the Buffalo32S pricing, we are doing our best to keep the Buffalo32S price reasonable. The price reflects the increase in cost of the components used along with a similar increase in production costs. For example, the clock, resistors, caps, VREGs, etc are all...

GND should always be low impedance. It sounds like you have some sort of GND loop. I really don't know much about the b22.

There is actually a very common sense reason. You do not want long wires that carry DC voltage to the DAC. You are just asking to pickup noise even if it is common mode. By putting it all in one case you get much more optimal wiring. By using Toroid your risk of EMI from the transformer is...

Great job! I like it! How is it working out?

LOL, doh, yes. I just was not sure if his Opus still had them in place or not.

Quote: Originally Posted by fran Rapid reply! 1)Just to confirm my ignorance: I can connect up the USB in I2S mode, use the GND of teh I2S block and run a wire from vbus to the opus... OK? 2)Now, if I wanted to preserve the option of using the SPDIF funstionality of the USB...

Quote: Originally Posted by fran Hi Russ/Brian, I've just picked up a secondhand opus module and was thinking of adding it to my USB module (currently doing duty as a .... USB module!). Anyway, I read a few pages back where you suggested that it might be possible to run the opus...

The funny thing is, I am a Nashville Predators and Colorado Avalanche fan. I just could not miss the hockey reference when I designed the DAC. Cheers! Russ

Hey Folks, I am only posting here because someone asked me to. IVY certainly can be used as a SE to Balanced converter. You would just omit the BAL/SE part of the cct, and tie -IN to GND. The setup would be similar to the Opus setup, in fact you could use that setup sans the BAL/SE...

Hi, Very good news here. We have a fresh batch of PS / Opus boards arrived and we will be back in business very very soon. We also have some exciting new things coming, but they are still at least a few weeks off. Cheers! Russ

Quote: Originally Posted by willisv Well that's good the numbers are normal, I thought I read somewhere that Va was supposed to draw more than Vd. The Lm 317 heatsink on my Vd side is too hot to touch for more than 3 seconds, as well as reg1 on the Buffalo. The Buffalo does sound...

No need for paste, the pads are designed to conduct heat. The THS4131 and the OPA1632 are virtually the same chip. Cheers! Russ

Quote: Originally Posted by manaox2 Just wondering if all three of these could be powered properly off of one or two LCBPS with one of the recommended Lindberg transformers? (Not along with the DAC too of course) Just one LCBPS with one of those dual secondary transformers is...

Quote: Originally Posted by Ech0 I was hooking up the S/PDIF Module this evening and checked for resistance between signal and ground on the S/PDIF_IN once I was done. There was resistance between the two. So, I pulled the wires off and removed the board. Checked again, still had...