DACs: Airport Express vs waveterminal vs mini-dac


I know this is impossible to quantify, but with a good stereo system (Cayin TA30 tube integrated amp & Green Mountain Audio Europa speakers), what's the magnitude of difference using the following dacs?

Airport Express (I already have the AX, and can connect it to the integrated amp with RCA's [analog])

Waveterminal U24: computer to USB to waveterminal to amp (waveterminal does the DA conversion)

Inexpensive DAC like ART DIO with waveterminal: computer to USB to waveterminal to ART DIO to amp (ART DIO does DA conversion)

Apogee mini-dac: computer to USB to mini-dac to amp

Other?

What's the best bang for the buck?
mschamberlin3865
I received my Waveterminal. I very much agree with the improved quality that has been discussed here. Wow what a difference. The clarity is very much improved, but without digital fatigue. The details at the soft dynamic levels are fantastic. There is also a much greater depth in the sound stage. I wrote a review of my comparison between it and the Transit on head-fi. This is the thread: http://www4.head-fi.org/forums/showthread.php?t=94520

Thanks Edumke for being the catalyst for my to get this unit. It really is amazing!

dshea
Hey all,

Newbie here..so bear with me.

I'm currently sending musci from my older G3 PowerBook laptop to the Airport Express unit, and than out of the AX unit via mini-optical to toslink into my HT receiver (Onkyo 502).

This sounds pretty good at this point in time, but I'm interested in how I could improve the sounds.

After looking at products like the Waveterminal, it seems that I have to power that unit via USB. Since the whole point of this (for me) is to be wireless, that's not an option as I don't want to run a USB cable from my laptop to the Waveterminal device.

Can any of you guys recommend an entry level solution that would be able to take the toslink optical output from the AX and convert to digital coaxial, and also hopefully allow me to improve the final sounds quality coming out of my Onkyo 502?

As a further fyi - for speakers (not that it really matters) I'm using a 5.1 system with Polk 35/25RTi for the front and back, a Mission center and a HSU sub.
Thanks for any help!

Chris
"I tried the Transit on two separate Apple systems myself, and had several friends come to the same conclusion on different systems.
....the music sounded like it was castrated."

I heard back from M-Audio and they have verified that "in order to match levels of the MAC to PC, the MAC digital out must be set to +8."

I recently tried the comparison of MAC to PC using my Off-Ramp at CES, and initially it really sucked, but after turning off all of the DSP functions of the MAC, it got a lot better. The dynamics and loudness was lower though. I think the +8 setting explains this. M-Audio said that the driver fro the Transit for MAC is actually superior to the PC version.