| NewTesla |
Hi.
As I saw some posts asking for switching supplies for class D modules I send you a photo of my own setup.
I am using some Hypex Ucd400 modules to power a pair of big 3-way boxes.
I have got my supply from here( I have paid 130 for it): www.redrocksaudio.es. Actually my supply has a main output for 60+60 volts ,another one for 30+30 volts and 12+12 volts for low power aux circuits and it has PFC on input also. I am using it with 3 Ucd400 connected and it works without problem so I took away my heavy toroidal analog supply by now. |
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| HYPERTUNE |
| Good to see another SMPS available, and for a good price. I've sent an email to them to ask if it is available with different voltages. ( I want around +-45v for my Truepath) I'll let you all know the response...... |
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| peterhenk |
I NewTesla,
Very intresting,
Why did you choose these, an not (for example) thecoldamp ones?
How did you order these? And what is the price?
Thank You
Peter |
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| HYPERTUNE |
I just got a reply from red rocks audio saying the price for the SMPS is $204 USD and it is no problem to supply it with different voltages.
Regarding ordering, I emailed info@redrocksaudio.es and they replied with a PDF order form.
the data sheet http://www.redrocksaudio.es/files/SMPS6060PFC.pdf
states the swithcing frequency is 125khz, which I assume is a good starting point for an audio grade SMPS.
I think I'm going to try one of these out. Unfortunately this will be for my first ever DIY amp, so I wouldn't be able to give any useful comparison to any other products/designs.
edit:
I've just been checking out some of their other products, and came across this:
http://www.redrocksaudio.es/files/miniPROCII.pdf
Digital active crossover with EQ.
I have asked for pricing on this also.
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| NewTesla |
Hi:
The reasons to choose this and not the coldamp one were:
-PFC stage on input
-Better price
-No PWM control but quasi resonnant fixed frec control so less EMI radiation and noise.
-More power and no problems without load.
I saw it at FrankfurtMesse exhibition I left my email and they sent me a price list and an order form after. |
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| HYPERTUNE |
I just received the price list and the digital crossover (2 way) is $128 USD. I am waiting a response regarding a conversion module to 4 way. This seems like a very resonable price, considering the time delay and eq functionality built in.
Their SMPS seems to include the required +-12v supply for the crossover module also.
It is also worth noting that the quantity discounts are quite resonable. Especially for the SMPS 11 and up. Maybe a group buy is in order. ;) |
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| HYPERTUNE |
| Just got a reply stating the module to convert the crossover to 4 way "will be available around third week of July, but we dont have decided its price yet" |
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| joemana |
Hi NewTesla,
After replacing your trafo with smps is there a sound quality difference or none at all?
Joe |
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| NewTesla |
Hi:
I did not find any detrimental diff. on the sound quality of the amplifiers but the lack of physical working noise from the old toroidal trafo. The only sound left is the small hiss of the Ucd400.s when idle with no sound on the inputs. The fan included has also very low noise so the only way to know that the power is on is the blue led light inside the supply and the fan blowing.
I do not have the proper equipment to measure the residual noise of the amplifiers after the upgrade but in my listening tests I could not detect it. |
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| megajocke |
That seems like a nice power supply - unregulated quasi resonant half bridge with PFC front end giving regulation. :)
Seems lightweight for its power too when you compare it to mains frequency transformers... :cool: |
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| chris7916 |
| quote: | Originally posted by HYPERTUNE
I just received the price list and the digital crossover (2 way) is $128 USD. I am waiting a response regarding a conversion module to 4 way. This seems like a very resonable price, considering the time delay and eq functionality built in. |
I sent an email too and btw, they replied very quickly. good communication!
I tried their miniProcII interface. Very intuitive and easy. One point that is worth to notice (unless I'm wrong): this digital crossover is for ONE channel. would you want stereo, you need 2 miniPROC. Am I correct ?
Christian |
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| HYPERTUNE |
Christian:
yes, I believe you would need two.
I also found that they responded very quickly to emails.
I will order an SMPS as soon as I decide the voltage I will run on my Truepath(s). |
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| ntropy |
Yes, for Stereo you need 2 of these.
I was asking for the price for the miniPROC II as well. Compared with the dcn23 from Groundsound it seems a very good price. A stereo dcn23 with power supply & relais board costs around 687.
I guess 2 miniPROC II with power supplies and the 4 way upgrade would set you back around half of that. The dnc23 software has the nice feature of loading measured frequency response of the drivers, something I don't see here. I would go for the groundsound because I prefer its software but the price just knocks me out :dead:
Btw, the 200 class-d amps from redrockaudio remind me strongly of the ucd180. I'm looking forward to see some THD measurements :) |
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| Calvin |
Hi,
I tested the MiniPoc Demo and must say, that I donīt find the handling intuitive at all. Why for example the division into Input-EQ, EQ A and B?
The grafics are very basic (show EQ) and are not what could be expected nowadays as standard.
I miss out the possibility to load measured LS-response data, which eases the filter design process considerably.
Compare this prog against the HiFiAkademie prog. Here You can set 16 filter blocks of 2nd order (HP, LP, EQ, et al) for each of the 2 channels and load measured response data. Handling is far more intuitive than MiniProcīs. MiniProc has the only advantage of a basic limiter-filter.
Since the hardware cost is generally quite low for such filter-modules lowish price tags result rather from the capabilities of the software.
jauuu
Calvin |
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| HYPERTUNE |
| quote: | Originally posted by Calvin
Hi,
I tested the MiniPoc Demo and must say, that I donīt find the handling intuitive at all. Why for example the division into Input-EQ, EQ A and B?
The grafics are very basic (show EQ) and are not what could be expected nowadays as standard.
I miss out the possibility to load measured LS-response data, which eases the filter design process considerably.
Compare this prog against the HiFiAkademie prog. Here You can set 16 filter blocks of 2nd order (HP, LP, EQ, et al) for each of the 2 channels and load measured response data. Handling is far more intuitive than MiniProcīs. MiniProc has the only advantage of a basic limiter-filter.
Since the hardware cost is generally quite low for such filter-modules lowish price tags result rather from the capabilities of the software.
jauuu
Calvin |
Can you give any more info about that product? Is there any possibility for 3 way? I saw that there are two modules, but could not work out what the difference is........ |
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| chris7916 |
Calvin,
did you try Impulse software ? It's miniProc companion software that permits to perform measures, this feature being currently missing within miniProc.
I got an email from Redrocks explaining that next miniProc version will include similar feature.
I don't know if I can post it here. Maybe it's better to just ask them yourself. I'm sure they will reply very quickly.
Then, regarding your other (btw valid) points:
interface doesn't aim, for what I understand, at providing full analysis features. Purpose being to build active speakers with embedded active filter, miniProc covers it. Program interface only intend to set parameters for this filter. At least that's my explanation ;-)
I'm looking at this for other purpose. I'm currently building an active filter (based on Jens Rasmussen design) but feel this miniproc will do the job easily and will be more flexible once additional module (to prvide 4 ways) will be available.
Equalizations... hmmm, again, the way I understand it is that is permits to change input signal (is it really useful having in mind active speakers ?) and also A section and B section (each being the two sides of your filter) without interaction. Then, unless I'm wrong, you can act at output signal level. This could be used for instance, benefiting from the 4 presets, to have different curves depending on where you are using your speaker.
Well, I don't want to push it too much ;-) I'm not selling it and do not work for this company. I'm only try to understand what they had in mind with such product and how it could fit my needs.
Regarding their SMPS, I will definitely buy one as single SMPS for my "3 amps" project made of 2 *Truepath + AMP5. Question still remain filtering.
With miniproc, it's no more DIY... ;-)
Cheers
Christian |
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| Calvin |
Hi,
I just tested the MiniProc-Program as it can be downloaded from the website.
| quote: | | interface doesn't aim, for what I understand, at providing full analysis features. Purpose being to build active speakers with embedded active filter, miniProc covers it. Program interface only intend to set parameters for this filter. At least that's my explanation ;-) |
That is right. The prog only functions as a tool to generate the filter coefficients. With IIR-Filters (analogue to analog filters) You have a number of filter blocks of 2nd order that can be cascaded. MiniProc separates these blocks into a common equalizer section and two channels A and B. With the mentioned HiFiAkademie program You have 16 filter blocks per channel which You can configure freely (as HP LP or EQ). You can import measured Freq-responses (from Arta, DASL et al).
Without this possibility its rather difficult or means more effort to get good and reliable results.
jauu
Calvin |
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| Bgt |
| quote: | Originally posted by NewTesla
Hi.
As I saw some posts asking for switching supplies for class D modules I send you a photo of my own setup.
I am using some Hypex Ucd400 modules to power a pair of big 3-way boxes.
I have got my supply from here( I have paid 130 for it): www.redrocksaudio.es. Actually my supply has a main output for 60+60 volts ,another one for 30+30 volts and 12+12 volts for low power aux circuits and it has PFC on input also. I am using it with 3 Ucd400 connected and it works without problem so I took away my heavy toroidal analog supply by now. |
How is the isolation from mains to ground/secondary outputs? Is it >3KV? Do you need mains ground? In other words: is it a Class II unit. |
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| joemana |
| quote: | Originally posted by HYPERTUNE
Christian:
I will order an SMPS as soon as I decide the voltage I will run on my Truepath(s). |
Hi Christian,
Do you order the supply yet? Do you know if the 12V is isolated?
I'm also planning to use it on Truepath and found out that 12V need to be isolated, now I'm worried with the two units that I ordered.
NewTesla,
Is the 12V isolated?
Thanks,
Joe |
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| NewTesla |
Hi:
The +12V -12V connector has the common tied to ground but this can be isolated if you need eliminating a link (L2) on the pcb board.
About the isolation and safety I asked them and the supply has 3kv isolation between primary and secondary circuits and earth connector and it is a class I device using EN60065 safety regulation. |
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| joemana |
Thanks NewTesla,
Just found out that they isolated the +/-12V on my SMPS.
Joe |
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| anomalous |
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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| joemana |
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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| noub |
| 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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| anomalous |
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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| ntropy |
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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| joemana |
[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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| ntropy |
| So I can have +/-45V for UCD180 and +/-60V for UCD400 at the same time? That would be sweet :-) |
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| anomalous |
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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