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Old 20th December 2006, 03:35 PM   #1
theseum is offline theseum  United States
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Default Hypex SMPS - When Is It Coming? Alternatives?

I'm looking to build a hypex amp with two UCD180's and I've read rumors that Hypex will soon be shipping an SMPS power supply -- does anybody know when this might happen?

Also, are there any products out there right now that will work just as well? Part of me wants to wait for the supply that I know is designed for the modules to "just work", but on the other hand I am getting impatient!

thanks very much!
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Old 20th December 2006, 03:49 PM   #2
Dag is offline Dag  Sweden
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Hi!

Coldamp has two smps but I do not know if they are good. Last time I checked there were no data/measurements on noise and line/load regulation.

http://www.coldamp.com/opencms/openc.../en/index.html

D
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Old 20th December 2006, 04:24 PM   #3
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I did some testing on it before. Sound very good

testing of SPS80 SMPS
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Old 20th December 2006, 05:35 PM   #4
ssanmor is offline ssanmor  Spain
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You can find two SMPS specifically designed for audio at our web, www.coldamp.com.

The first one (SPS80) has been used by a lot of customers so far, some of them with our modules, some with UCD, some with LC Audio and some with linear/tube amps. All of them seem to be very satisfied with its performance and sound, so far. There is a higher voltage output version (SPS80HV) designed for +/-80V output, approx.
The other one (SPS30) is to be available from next week, slightly less powerful but sharing the same design.

All of our supplies have an auxiliary +/-12V regulated output, very useful for powering the driver stage of the BP4078, active preamplifiers, etc.

Both of them work very well with our modules and, judging from the tests from our customers, with our competitors' as well. However, you can find that we offer special prices for packs including supply and coldamp amplifiers.

Load regulation is excellent, dropping around 1V at max output (try to get this with a linear!) and noise is very low, you can see some measurements posted by ackcheng and others. We will try to progressively include more measurements in the datasheets.

Best regards,
Sergio
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Old 20th December 2006, 07:31 PM   #5
mourip is offline mourip  United States
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Quote:
Originally posted by ssanmor
You can find two SMPS specifically designed for audio at our web, www.coldamp.com.

The first one (SPS80) has been used by a lot of customers so far, some of them with our modules, some with UCD, some with LC Audio and some with linear/tube amps. All of them seem to be very satisfied with its performance and sound, so far. There is a higher voltage output version (SPS80HV) designed for +/-80V output, approx.
The other one (SPS30) is to be available from next week, slightly less powerful but sharing the same design.

All of our supplies have an auxiliary +/-12V regulated output, very useful for powering the driver stage of the BP4078, active preamplifiers, etc.

Both of them work very well with our modules and, judging from the tests from our customers, with our competitors' as well. However, you can find that we offer special prices for packs including supply and coldamp amplifiers.

Load regulation is excellent, dropping around 1V at max output (try to get this with a linear!) and noise is very low, you can see some measurements posted by ackcheng and others. We will try to progressively include more measurements in the datasheets.

Best regards,
Sergio
Do either the SPS80 or the SPS30 have DC sensing circuits to monitor the amp outputs like the Hypex linear supplies do?

Thanks!
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Old 20th December 2006, 07:58 PM   #6
ssanmor is offline ssanmor  Spain
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No, that's up to the builder! The supplies don't include the DC protection circuit, but we can provide schematics for that to the customers who ask for it, we consider it a simple exercise that will increase the DIYer fun
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Old 20th December 2006, 11:14 PM   #7
Fin is offline Fin
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This eBay shop is selling some smps for audio:-
Stadholder Tek

Not sure how good they are.........................but the price looks nice
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Old 21st December 2006, 12:31 PM   #8
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Quote:
Originally posted by Fin
This eBay shop is selling some smps for audio:-
Stadholder Tek

Not sure how good they are.........................but the price looks nice
I contemplated buying one of those supplies some time ago. I came to the conclusion that +-45v @ 2A is pretty useless unless you plan on powering >16 ohm speakers.
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Old 21st December 2006, 02:49 PM   #9
Fin is offline Fin
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Quote:
Originally posted by theAnonymous1


I contemplated buying one of those supplies some time ago. I came to the conclusion that +-45v @ 2A is pretty useless unless you plan on powering >16 ohm speakers.
Any good for use with one of these?

EB-TA0103
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Old 21st December 2006, 02:57 PM   #10
ssanmor is offline ssanmor  Spain
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You will require several supplies to power that: a main supply (I assume around +/-50V to +/-60V, that you could obtain with the supply you proposed, although it is so small that it won't work,
then +/-5V for the input stage, and then +12V referenced to the negative rail for the driver.

You can still use a coldamp PSU, using the aux +/-12V (reducing them with 7805/7905) to get the +/-5V input section voltage, and then generate the +12V referred to GND with a simple circuit from the negative rail (drop us an e-mail to ask, if you are interested).
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