Full power, no issues there
For a monoblock but not in a stereo application though right?
Full power, no issues there
Mostly correct. In a monoblock 1ET7040SA configuration, the SMPS1200 is more than enough power.For a monoblock but not in a stereo application though right?
Amir will love it! (the XLR jacks aren't upside down )Final pictures for the website
This was a joke and had a wink emoji. The emoji isn't showing and without it, I sound like a jerk. Hope you took it the right way!Amir will love it! (the XLR jacks aren't upside down )
I just checked and I am hearing that new Purifi 7040 needs 75 volts to reach full rated power but the power supply from Hypex smps 1200a400 only puts out 64 volts, while the smps 1200a700 puts out 85 volts, which would be too much. How does this reach rated power with the Hypex smps 1200a400, even in a mono mode, if the voltage output is below that required for full power?
You may take a look at this supply. it's available in +-70VDC in the selection, as far as I know they can customize it for you.
SMPS1K-PFCR2 – MicroAudio
micro-audio.com
You will get the same output voltage even if your line voltage goes down to 100VAC or up to 260VAC
That manufacturer can build +-75V I think, still, you have to checkThat won't get you to full rated power either at 70V without customization from the manufacturer. Since the amp module from Purifi is only available to OEM's, this might be of interest to them.
Let me double check something and I will get back to you with a correct answer (on my end).I just checked and I am hearing that new Purifi 7040 needs 75 volts to reach full rated power but the power supply from Hypex smps 1200a400 only puts out 64 volts, while the smps 1200a700 puts out 85 volts, which would be too much. How does this reach rated power with the Hypex smps 1200a400, even in a mono mode, if the voltage output is below that required for full power?
If I understand you correctly, then all those manufacturers who are selling or going to sell any amplifiers with the 1ET7040SA modules will be selling it by misleading the customers. Specially if the SMPS1200 from Hypex is +-64 and subject to the AC line variations.That won't get you to full rated power either at 70V without customization from the manufacturer. Since the amp module from Purifi is only available to OEM's, this might be of interest to them.
Oops, delayed post - this didn't go through earlier. Some people have already said some of this. Nevertheless...I just checked and I am hearing at that new Purifi 7040 needs 75 volts to reach full rated power but the power supply from Hypex smps 1200a400 only puts out 64 volts, while the smps 1200a700 puts out 85 volts, which would be too much. How does this reach rated power with the Hypex smps 1200a400, even in a mono mode, if the voltage output is below that required for full power?
My first thought is you'd probably want a 230V PSU proportional to line voltage, and nominally 70V. Then you'd be on-spec at 230V, and you'd be varying between 67V to 73V from 220V to 240V. You'd be out-of-spec on the 1ET7040SA once you hit 247V volts though, exceeding 75V.For example if my AC line voltage is 225VAC, and at other place 240VAC what do you expect?
My first thought is you'd probably want a 230V PSU proportional to line voltage, and nominally 70V. Then you'd be on-spec at 230V, and you'd be varying between 67V to 73V from 220V to 240V. You'd be out-of-spec on the 1ET7040SA once you hit 247V volts though, exceeding 75V.
Apparently nominal tolerance on mains is actually quite lax in a lot of places. One bit of googling suggests 217-253V for UK, and it's not the worst. So the 75V absolute maximum isn't leaving you quite enough slack for the nominal 70V.
The 1ET400A is a lot better - it has the same 75V absolute max, but given 65V nominal you'd have to hit 265V on the mains to overdrive it. Shouldn't be possible without a mains fault, and you're probably out of spec on the PSU by that point too. (Would be on the SMPS1200A400).
If I was a 1ET7040SA builder, I'd probably want to prod Purifi about its 75V max. Don't think it's high enough to totally safely fit a 70V supply.
Edit: And the recommended max is even tighter at 73.5V. At that point, you just can't be using a "proportional to input" supply, at least not with a nominal 230V = 70V. Getting rated power out of this module is going to be tricky...
It does seem that the Purifi amplifiers deserve better power supplies than the Hypex unregulated units. Perhaps that’s why March audio have their own SMPS which I imagine are regulated since they run from 100-240V.My first thought is you'd probably want a 230V PSU proportional to line voltage, and nominally 70V. Then you'd be on-spec at 230V, and you'd be varying between 67V to 73V from 220V to 240V. You'd be out-of-spec on the 1ET7040SA once you hit 247V volts though, exceeding 75V.
Apparently nominal tolerance on mains is actually quite lax in a lot of places. One bit of googling suggests 217-253V for UK, and it's not the worst. So the 75V absolute maximum isn't leaving you quite enough slack for the nominal 70V.
The 1ET400A is a lot better - it has the same 75V absolute max, but given 65V nominal you'd have to hit 265V on the mains to overdrive it. Shouldn't be possible without a mains fault, and you're probably out of spec on the PSU by that point too. (Would be on the SMPS1200A400).
If I was a 1ET7040SA builder, I'd probably want to prod Purifi about its 75V max. Don't think it's high enough to totally safely fit a 70V supply.
Edit: And the recommended max is even tighter at 73.5V. At that point, you just can't be using a "proportional to input" supply, at least not with a nominal 230V = 70V. Getting rated power out of this module is going to be tricky...
It does seem that the Purifi amplifiers deserve better power supplies than the Hypex unregulated units. Perhaps that’s why March audio have their own SMPS which I imagine are regulated since they run from 100-240V.
P501 Mono-Block Power Amplifier - March Audio
The P501 is a Purifi 1ET7040SA based mono-block amplifier. This simply elegant product is milled from solid aluminium with a tough anodized treatment. Exceptional fit, finish and build quality. Class leading technical and subjective audio performance.www.marchaudio.com
Not sure what rail voltages result though but Alan March claims 250W/8 Ohm which suggests around +/-70V
His IET400 amps also use a regulated supply but their power output suggests a supply nearer the +/-65V nominal. Perhaps just by adjustment of the regulator control voltage?
Don't forget to update the other part of the website to match the product pages.After some follow-up with Purifi:
While the SMPS1200a400 does not provide the recommended +/-70V, it currently comes "closest" to what the 1ET7040SA can handle.
I am updating my specs on the mono 1ET7040SA to acknowledge more realistic power output due to the lesser voltage. Never was my intention to mislead and I appreciate the error being pointed out.