cetoole

Indeed. Cut the extension down to whatever length you want and put a WPI plug on it. All the info you need is here.

Its a very easy DIY.

x2, its all about how everything is implemented.

I get that fairly often too, generally assume they have gotten used to no one being home. Dunno.

Interesting choice, Steve. Dual Sigma22, but just one Beta22?

Old one for $100 shipped off a'gon.

Hafler DH-120

I bet that will be fun, Steve. Man, I would love to hear the K1000 out of an F5.

Just got back from a 5 mile run. I dunno what it is, but I find I love running at night. Bit different than the 5 hours or so I spent soldering last night at this time.

2 pence pieces, actually. Opened it to try and figure out what was rattling...

Yay, moar DACs!

Pulse transformers ftw.

Yeah, you would probably drop bits if it is delayed for more than the buffer can handle. I just kinda doubt that this is a real issue, unless you are having other PC problems, and then you would generally have the same issues with an adaptive solution, or PCI soundcard outputting SPDIF (which is what I currently use). x2

If it is bad enough, it is possible to drop bits, but the data is all fifo buffered in the receiver, so I dont really see how jitter would be present on the interface. Yeah, you will get some new jitter in the DAC, but this would have to be far less significant than what you would get from a recovered clock scenario. Plus, you can use that nice, clean clock to reclock the data again as it leaves the digital filter.

Yeah, CDs basically couldnt be constant RPM. Its not like they get progressively tighter data encoding on there. Plus, any half decent transport buffers the disc read.

The SPDIF is probably worse, but a good SPDIF receiver should help clean it up. Also, its much easier to get galvonic isolation of the SPDIF signal, which, especially sourced from a computer, is a good thing in my book. Dusty is right though, both the SPDIF and I2S outputs from the PCM270x are recovered clocks, and the internal PLL of the receiver isnt all that good at cleaning them. Async is really the best way to do it from a jitter standpoint, though a good PLL and reclocking would go a long way. I know some of the Tent secondary PLLs, for example, claim single digit ps range jitter figures, which is just superb.

Its very possible to have high jitter i2s, and what you get out of the PCM270x is quite high. Forget the measurements I have seen, but somewhere around 1ns IIRC. Also distortion goes out through the roof every 1ms as it resyncs or something. A good PLL/reclocking solution should significantly improve this. Of course, if you are async, then you can just take the masterclock signal that is feeding the USB chip and use that to directly reclock, and get the best of both worlds. Too bad that is so rare.

Some parts from Digikey.

We demand high rez pics when it arrives. Curious what their discrete output stage is.

He is basically saying that most USB implementations built into DACs are not very good, and actually fairly similar to external USB-SPDIF converters. This is actually pretty true, and some of the modern SPDIF receivers probably have sufficiently good internal PLLs to actually provide lower jitter from USB-SPDIF than you would get from the I2S output of most USB receivers. Yeah, basically. Plenty of very good SPDIF only DACs out there, just get whatever appeals and a USB-SPDIF converter.

I wouldnt worry about issues with usb-spdif if I were you. The DAC is much, much more important than that, dont compromise what you get just so it has USB.

You are wrong. WTF does a simple circuit topology have to do with noise floor? Not saying the F1 is lacking in that regard, but PSRR is not dependent on how simple the circuit is, but rather on the particular topology used. Power supplies also matter for this, and it is certainly possible to have an amplifier with crappy PSRR be extremely quiet simply by taking care of the power supply. On the issue of the F1's output impedance, it is meant to act as a current source for speakers. When used into an 8ohm load, the F1's output impedance is dramatically higher than that of the speaker, so it actually does a pretty fair approximation of a current source, but into the k1000, it is just a voltage source with shitty damping factor.

I bet Rugby is a bit intimidated.

The heck were you doing buying headphile stuff?

Sell it all, buy some Stax.