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Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

MUSES 72320 electronic volume
MUSES 72320 electronic volume
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Old 28th October 2013, 06:30 PM   #211
FdW is offline FdW  Netherlands
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MUSES 72320 electronic volume
Originally Posted by hm4nine View Post
@ johncurtis:

Interestingly - clicking on ebay link - this message comes:

This listing () has been removed, or this item is not available.

Therefore it cannot be said which of if a MUSES-chip was used there.
Do you remember anything about (starting-) price of offer?
Try the search box (on ebay.com) and enter "Muses® Hi End Electronic Volume Control" it helps
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Old 28th October 2013, 06:45 PM   #212
hm4nine is offline hm4nine  Europe
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Thank you!
I only tried "MUSES" in Search Box, obviously not enough to get the wished result...
It seems you are better then I when searching in ebay
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Old 28th October 2013, 08:10 PM   #213
hm4nine is offline hm4nine  Europe
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There is obviously a difference between Spiri’s board and mentioned offer in ebay:

Spiri developed a “passive board”, say a 4-fold input selector (with relays) followed by the MUSES. MUSES chip is not buffered with any active devices, buyer has freedom to design his own audio electronics. His board has several regulators on board and he also offers a suitable supply board and a display with controller.

Ebay offer seems to have only one input going directly to MUSES chip, which is followed by a dual opamp-buffer/amplifier. Opamps’s outputs may probably be muted with a relay. Connections for control functions are visible but not populated. There are no regulators on board; it may be used as an active linestage which needs an external voltage regulation.
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Old 31st October 2013, 02:41 AM   #214
ammel68 is offline ammel68  United States
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MUSES 72320 electronic volume
Here's the board on Ebay:

Last edited by ammel68; 31st October 2013 at 02:43 AM.
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Old 31st October 2013, 02:48 AM   #215
ammel68 is offline ammel68  United States
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MUSES 72320 electronic volume
Well, my link above doesn't work either...strange.

I typed in "muses volume control" in the search box and the result was the board from seller "lennyn1" in Mount Vernon, NY.
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Old 31st October 2013, 03:30 AM   #216
ncc is offline ncc
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OK, try this link
Muses® Hi End Electronic Volume Control | eBay
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Old 7th November 2013, 03:25 PM   #217
CeeVee is offline CeeVee  Portugal
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MUSES 72320 electronic volume
Default Lots of kits in japan....

I think this is very interesting as well :Muse volume control

and this one with a smaller expansion board for balanced use: Kit2

ofcourse distribution Japan only.....

Last edited by CeeVee; 7th November 2013 at 03:41 PM.
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Old 7th November 2013, 08:59 PM   #218
johncurtis is offline johncurtis  United States
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I have found the original site that sells more MUSES based items: High End Audio Products for Music Lovers www.academyaudio.com
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Old 12th December 2013, 05:34 AM   #219
spiri is offline spiri  Austria
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Default What do you want from a muses application?

I think, the best thing is to place the muses directly behind the relays and as short as possible before the preamp or buffer. A short signal paths is one of my guidelines for a design.
A input selection is always useful.
While replacing a normal potentiometer on the frontplate with a muses board, the signal paths and cables are very long from the front back to the frontplate and back to preamp.
Not everyone likes the op amps as the output stage.
Maybe a buffer directly behind the muses is a thing, then the muses can be used as buffered passive preamp. With servoloop ?

It would be nice to collect here some ideas for a muses application, which makes everyone happy.
I look forward to inspiring discussions or to see some pics of your muses implementations.
Kick it up a notch with www.akouo.at
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Old 14th December 2013, 11:24 PM   #220
ChiDave is offline ChiDave  United States
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Here's what I'd like very much, as a newbie. Besides liking it, I'd actually buy this! A board with nothing except the volume chip and whatever passive components are absolutely required. No input selection, power regulation, or buffers of any sort. Also, the option to get the volume board with whatever is required to use it in a balanced circuit (hey, I just said I'm a newbie).
Separately, offer the volume control board with the option of buying a knob and display that will work with it. Personally, I'd buy all of the controller stuff and two volume boards for a true dual mono design.
I understand the need to keep signal paths short, but this quickly turns into a lot of design decisions being made. I'd rather sacrifice a little bit of signal path length for the freedome to choose the implementions for selection, power regulation, and, of course, buffering. How about spec'ing unusually high quality PCB traces and whatever else you know along those lines? I've just started researching that aspect of things.
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