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Old 17th August 2014, 11:04 PM   #1
bk856er is offline bk856er  United States
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Default seeking input on my chassis layout

Soon I will be dismantling my DAC to update as follows:

(1) Replace LCBPS currently powering Legato with Placid HD BP v2.1 and larger 50VA toroid.

(2) Add Amanero USB to I2S adapter + Acko S03 isolator.

(3) Add Otto-II 2:1 mux.

It's a basic Buffalo-II with current version Tridents, LCDPS, Legato v2 with supertex parts, S/PDIF 4:1 mux/receiver. Was planning to keep the LCDPS since I have Tridents.

Any suggestions on where to place the new items?

Any rearranging that should be done?

Any "low hanging fruit" to reap?

BK

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Old 12th October 2014, 06:27 AM   #2
bk856er is offline bk856er  United States
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The pic below shows the arrangement I finally ended up with.

I wasn't quite sure how to handle the GND connections between the 4:1 mux/Otto-II/Buff-II. You can see the three blue shielded coax cables between the mux and the Otto and the three black UFL between the Otto and the Buff.

Should I connect GND between the mux and Otto or somewhere else?

Seems to be functioning fine on first listen via RCA out, apart from some occasional clicks and pops from both optical and USB inputs.

BK

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Old 13th October 2014, 04:17 AM   #3
bk856er is offline bk856er  United States
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Bit of a one-sided conversation here, but everything is now working perfectly. Added ground connections between the 4:1/Otto and Buff/Otto. Fixed a dodgy connection on the Legato output. Making sweet music. Nice to finally have USB connectivity, and I think the PS upgrades were also a plus. The Otto switching has been flawless. Maybe time to finally machine and install the 10mm front panel!

BK
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Old 14th October 2014, 03:19 PM   #4
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Sorry for not seeing this sooner...

Your layout looks really good. With a 10mm front, you should be able to recess those switch bushings very nicely.
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Last edited by BrianDonegan; 14th October 2014 at 03:23 PM.
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Old 15th October 2014, 04:02 AM   #5
bk856er is offline bk856er  United States
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Really happy with the overall performance - thanks for the wonderful designs. Not a single hiccup so far. Very satisfying to pull it all off and enjoy the results!

Turning some attention to the future aluminum front panel, now thinking input LED indicators might be a nice addition. Does the "4-input selection kit" listed under the BIII page work directly with the 4:1 Mux? I think I saw you mention elsewhere that it is now the default shipped with the 4:1 instead of the mechanical rotary switch? Could be just the ticket if I can squeeze it in....

BK
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