Duet Mods

[Peely]

Since the Duet's digital section is the same as the SB3, I plan to do the same upgrades I did to my SB3, which came from this excellent thread:

http://www.audiocircle.com/circles/i...?topic=45330.0

and produced a very nice improvement.

This stuff cracks me up, modding a digital output. I bet you insist on only the finest oxygen free cabling for your digital output, too?

Last time I copied a file onto my hard drive I seem to remember it working perfectly without any modification and with the cable that came with the computer too.

[funkstar]

Take a step back guys, mods are not necessarily Audio related, it could have been related to re-boxing the hardware.

[ToddSTS]

This stuff cracks me up, modding a digital output. I bet you insist on only the finest oxygen free cabling for your digital output, too?

Last time I copied a file onto my hard drive I seem to remember it working perfectly without any modification and with the cable that came with the computer too.

Not saying that a digital output mod works or doesn't work but.....

Writing data to a hard drive involves redundancy checks to make sure the data that is written is the same as what was supposed to be written. SPDIF output doesn't do that AFAIK and therefore isn't the same thing. Kinda like TCP vs. UDP.

Todd

[CPC]

This stuff cracks me up, modding a digital output. I bet you insist on only the finest oxygen free cabling for your digital output, too?

Last time I copied a file onto my hard drive I seem to remember it working perfectly without any modification and with the cable that came with the computer too.

No, as per the audiocircle.com thread, I'm just using parts which optimize the SPDIF inferface between the SB3/Duet and an external DAC's input.

The guy who came up with the digital output upgrades has over 30 years of experience as a communications network engineer and audio equipment designer.

What communication/digital audio equipment have you designed?

BTW- If you're happy with the stock SB3/Duet don't waste time reading the DIY Forum.

[funkstar]

BTW- If you're happy with the stock SB3/Duet don't waste time reading the DIY Forum.

DIY forum isn't exclusively for audio mods.

I am perfectly happy with the output of all my players but I'll continue to read this forum (just like i read all the forums, "New Posts" is my home). The non-audio mods are really interesting, actually same goes for the audio mods even though I personally wouldn't bother. If thats what people want to do with their time/money why would I stop them?

[Howard Passman]

I'll take anyone to add to the current crop of presidential fodder.

Please....anyone....

Howard

[Phil Leigh]

Since the Duet's digital section is the same as the SB3, I plan to do the same upgrades I did to my SB3, which came from this excellent thread:

http://www.audiocircle.com/circles/i...?topic=45330.0

and produced a very nice improvement.

Did you just remove the inductor as Pat advised?

[CPC]

Did you just remove the inductor as Pat advised?

No, the pulse transformer and matching components Pat recomended were added along with a BNC jack, and disabling of the 12.2880 osc.

[mrfantasy]

First peel the big rubber foot off the bottom.

The word on the street is removing it adds detail and space to the music, although it adds a "wrapped-in-gauze" effect to frequencies between 3000 and 3700Hz.

[Paradigm]

The dac in the Squeezbox duet receiver is a Wolfson, with internal linedriver used as a buffer. The older SB3 uses separated dac and buffer chip, so you could modify this by simply changing the buffer from the mediocre NJM 2041, to AD 8620 to get a sound that might be better.

This is not possibly in the squeezebox duet receiver- and maybe it would not be beneficial if it was, because the receiver sound so good as it stands unmodified. The only modifikation to be made on the Duet receiver is to swap the two elektrolytics ( 10 uF ) at the analog output, and replace with better sounding polypropylen.

Swapping the switching PSU to something better is not always entirely beneficial. You really have to listen if it sounds any better. It might even sound worse with replacing.