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Cheap Chinese supply- Check
Plywood heatsink- Check
Expectation bias- Check
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So I thought I'd test the Connex supply on my Purifi amps today. But before I got a chance, I measured the main rails which are supposed to be +-55v and this is what I get. Not sure if the cheap output caps failed or what it is.
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So people asked about the sound!
I must say I like it a lot better now after using it for a while, first listening impressions were rough it needed some break-in time so be aware of that. I don't like the original buffer so I am using the Nelson Nutube so far I really like that combo and I got that to work pretty well. I really think I need to replace the hypex power supply I use with the 1ET400A but have not done that yet, it sounds really good as is. my main speakers are low impedance dips under 3ohm and this amp has no issues. The amp sounds better on my RCF speakers the upper end on those are not as detailed and I can't hear the digital switchmode like artifacts which I think comes from the power supply but I don't know. When I first built the nutube buffer I used switch mode powersupply and after replacing it with a booster supply I liked it a lot better sounds really good now. So, all in all, it is a fantastic amp and everyone should at least try it out. my main amp is a Krell FBP600 which I love the 1ET400A is keeping up(almost)
I must say I like it a lot better now after using it for a while, first listening impressions were rough it needed some break-in time so be aware of that. I don't like the original buffer so I am using the Nelson Nutube so far I really like that combo and I got that to work pretty well. I really think I need to replace the hypex power supply I use with the 1ET400A but have not done that yet, it sounds really good as is. my main speakers are low impedance dips under 3ohm and this amp has no issues. The amp sounds better on my RCF speakers the upper end on those are not as detailed and I can't hear the digital switchmode like artifacts which I think comes from the power supply but I don't know. When I first built the nutube buffer I used switch mode powersupply and after replacing it with a booster supply I liked it a lot better sounds really good now. So, all in all, it is a fantastic amp and everyone should at least try it out. my main amp is a Krell FBP600 which I love the 1ET400A is keeping up(almost)
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You can always toss Christi at Connex an email. At least in my experience, he's always been very responsive to support requests after the sale.
Tom
The 20 other dual voltage supplies I own all measure at their specified voltage under no load. If I was measuring for current, yes a load would be required.
I think I know everything I need to know about this supply already. For me it was already a fail when he shares pictures of it on his website populated with Nippon Chemi-con caps, and it arrives with the cheapest caps he could find in the Chinese surplus cap bin.
I just tend to doubt everything
Yes, different solutions and implementations are always something interesting, and here you are absolutely right.
A regulated PS should always stay at nominal output level - load or no load. That's really why you want them
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So I go from a Hypex rep to Mr Davis now. Perhaps you should take some time away from the screen. And up the dose of medication.
My meds are at the correct level. The Hypex guess was a wrong one, i knew you had commercial interests and something was familiar. But you are going to be banned again, Mike!
A regulated PS should always stay at nominal output level - load or no load. That's really why you want them
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As Tom Christiansen replied, with no load this is not necessarily the case. Mine jumps all over the place if not connected to anything, and once connected to the amp it stays at +54.0/-53.9 without sagging even at peaks (which in my case are moderate anyway). It depends on the SMPS. So this one does an excellent job of keeping its voltage constant when powering an amp. Which is really how I want it.