I wonder if any SMPS manufacture could show us the UL/CE certificate to their SMPS products.
I will be more than happy to supply you with a SMPS any time. Be sure that my SMPS complies with the maximum safety standards, Isolation. etc...
Cresnet for medical device smps power supplies it would be a cake walk, but I'm not sure what I am going to have to ask for to have those supplies work well in an audio application where the load isn't a steady state application like a test device. I'm not sure if just having more capacitance would take care of that or not but I will have to find a smps designer who can help me specify the requirements to use with an audio amplification situation and also driving the dsp/dac circuit. I should talk to you outside of this thread as it is outside of LC's thread.
Thanks for the order.
As Clog said ESL are not low impedance speakers, so no worries about heat dissipation. I would rather take 2U chassis, it is much more home friendly than those big 3U cases.
Hardly wait to get your opinion and listening report when all done.
Thanks Malossi..... a dissipante 2u 300mm it will be
Thanks for the order.
As Clog said ESL are not low impedance speakers, so no worries about heat dissipation. I would rather take 2U chassis, it is much more home friendly than those big 3U cases.
Hardly wait to get your opinion and listening report when all done.
Yes LC... this listening report will follow - cannot wait to do it
. I will have it all at home the third week of March. Looking forward to it.Thank for your ultra quick response on the order and your advice regarding the DC sense modules.
Thnx Clog. I was a little in doubt as this stable heatsink temperature seems to be important and I do not want to "(Fluid post 2492: move away from LC's recommendations by getting bigger heatsinks"
But there is no room for doubt anymore...... so Modushop, here I come !
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Hi guys.
Regarding PSU to be used (my opinion):
When I was thinking what PSU to use for FO 1.4M I was deciding between linear PSU and SMPS from Cresnet. Finaly I decided to build the linear PSU (2x 500VA toroids) because I found some indications from other people, that linear PSU may perform better in bass and also because I was able to build this linear PSU for the similar price as the SMPS from Cresnet. But of course more effort was needed to implement the linear PSU compared to all-in-one SMPS solution. But my second choice was the SMPS from Cresnet, also because Cresnet is comunicative and he provided some measurements on request.
Regarding PSU to be used (my opinion):
When I was thinking what PSU to use for FO 1.4M I was deciding between linear PSU and SMPS from Cresnet. Finaly I decided to build the linear PSU (2x 500VA toroids) because I found some indications from other people, that linear PSU may perform better in bass and also because I was able to build this linear PSU for the similar price as the SMPS from Cresnet. But of course more effort was needed to implement the linear PSU compared to all-in-one SMPS solution. But my second choice was the SMPS from Cresnet, also because Cresnet is comunicative and he provided some measurements on request.
Hi back
Sorry no parts on my side, but still have some FO v1.2 modules on the stock.
Regards, L.C.
ok i sent you a pm.
Have tested both PS and must say that the diference is huge.
I don't know if you build a linear with 2KVA trafo and 12 caps Mundorf Mlytic HC+
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On top of this my understanding is LC has also optimised his modules with / for Hypex SMPS.
I am not experienced yet with these, but it seems to me SMPS are difficult to beat for high power deliveries on a lot of electrical parameters, not to mention they are light, efficient, small and, unless you have already all the traditional components handy, in practice less expensive for high power deliveries.
IMHO the real question is: do we lose anything using a single Hypex SMPS3K versus 2 (costly) Hypex SMPS1200 with the FO 1.4 modules....
Claude
I am not experienced yet with these, but it seems to me SMPS are difficult to beat for high power deliveries on a lot of electrical parameters, not to mention they are light, efficient, small and, unless you have already all the traditional components handy, in practice less expensive for high power deliveries.
IMHO the real question is: do we lose anything using a single Hypex SMPS3K versus 2 (costly) Hypex SMPS1200 with the FO 1.4 modules....
Claude
It would be interesting, if someone can provide justification, why SMPS is really better. Except for generic ones, like "smaller, more efficient, more current...". I mean some computation.
For example my 500VA toroid is providing ~6% of voltage drop at full (500W) power. + Capacitors are able to deliver 6A reservoir (2x 10mF) at 60V. It means ((+-60V * 6) + 500) == ~1200W peak per channel and 500W permanent. Is not it enough for AB amp of 250W? My speakers are 200W RMS and 300W peak.
For example my 500VA toroid is providing ~6% of voltage drop at full (500W) power. + Capacitors are able to deliver 6A reservoir (2x 10mF) at 60V. It means ((+-60V * 6) + 500) == ~1200W peak per channel and 500W permanent. Is not it enough for AB amp of 250W? My speakers are 200W RMS and 300W peak.
Perhaps it is speed related? The way the energy is transfered?
Checking output impedance at various frequencies could perhaps give a hint on solid vs SMPS?
Having said that, if it sounds better, then it is already fine to me, I have already enough things to fiddle with and wouldn't mess with DIY SMPS ;-)
Checking output impedance at various frequencies could perhaps give a hint on solid vs SMPS?
Having said that, if it sounds better, then it is already fine to me, I have already enough things to fiddle with and wouldn't mess with DIY SMPS ;-)