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Class D Switching Power Amplifiers and Power D/A conversion

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Old 24th June 2008, 07:54 PM   #21
joemana is offline joemana  United States
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Thanks NewTesla,

Just found out that they isolated the +/-12V on my SMPS.

Joe
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Old 27th June 2008, 02:19 AM   #22
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NewTesla, you said your supply was +/- 60V.

the spec sheet for that supply shows +/-75V - did you have them change this for you? if so, did the mod cost?

This power supply looks pretty ideal for my project, which is a combined 3 channel amp to run a pair of mains - BFM DR200's from a Truepath - and a mono Sub channel - currently a pair of BFM Autotubas from a UcD400 module.

cheers

ben
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Old 27th June 2008, 02:45 PM   #23
joemana is offline joemana  United States
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Hi,

I'm not NewTesla but I will give some info on my experienced with the vendor.

I think the spec. that is published is the old one, because when they sent me the connection diagram, the output voltages were: +/-80V, +/-30V, +/-12V and 12V for fans.

I requested to lower the 80V to 55V and isolate the +/-12V to be used for Truepath, that is no cost to me. I think most modification are free as long as there is no substantial amount on parts added to it.

Joe
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Old 27th June 2008, 05:51 PM   #24
noub is offline noub  United States
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Sorry this is just a post to get my account of "moderated status" so that I can email professoree for the PC-Multiscope software.
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Old 30th June 2008, 05:37 AM   #25
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can anyone who has used this power supply with a truepath give details of deriving the 5v and 10V supplies from it? the 5V is referenced from ground, but the 10V is ref'd from the -ve rail, so they both cant come off the 12v supply. i was thinking the 30v supply could provide the 10V requirement, and the 12v supply the 5V one.

but if someone could knock up a quick circuit diagram, and let me know what I need to tell Red Rocks to do to the supply, i would be much indebted.

cheers,

ben
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Old 30th June 2008, 04:05 PM   #26
joemana is offline joemana  United States
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Here is an example for wiring SMPS to Truepath from RedRocks.

Joe





http://www.redrocksaudio.es/files/TRUEPATH.pdf
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Old 30th June 2008, 07:53 PM   #27
ntropy is offline ntropy  Switzerland
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Interessting, they also have wiring diagramms for Hypex amps:

http://www.redrocksaudio.es/files/HYPEX.pdf

+/-30V seems not ideal for UCD180 imho. I would also like to know the max current the smps can deliver for +/-30V and +/-60V.
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Old 30th June 2008, 08:01 PM   #28
joemana is offline joemana  United States
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[QUOTE]Originally posted by ntropy
[B]Interessting, they also have wiring diagramms for Hypex amps:

http://www.redrocksaudio.es/files/HYPEX.pdf

+/-30V seems not ideal for UCD180 imho.

Hi,
You can request whatever voltages you want as long as it is not over (not sure if 80V is max) +/-80V.

Joe
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Old 30th June 2008, 08:18 PM   #29
ntropy is offline ntropy  Switzerland
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So I can have +/-45V for UCD180 and +/-60V for UCD400 at the same time? That would be sweet :-)
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Old 30th June 2008, 11:00 PM   #30
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thanks for the links to red Rock's circuit diagrams

I just ordered one of these supplies, and the cost was US$204 plus US$60 shipping to australia.

you need to request them to modify the supply to suit a truepath (60V rails, floating 12v supply) - which they do at no cost.

Im going to be running both a truepath and a UcD400 from one of these supplies, whioch since both use 60v rails, is not an issue. Im not sure if they can modify the 30V rails, but it would certainly be interesting to know.

a version of this supply that could deliver +/-60V AND +/-80V would certainly be interesting, but probably pushing the limits of the design. im thinking Truepath driven main speakers, plus UcD700 driven subs...
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