Do you think there would be any advantage to using a toroidal transformer in a SMPS? I always see them used in car amps. Would this help reduce radiated noise?
Indeed, not too much.
I never tested one, to be honest, but radiated noise is there, and it can be minimized.
I have been using my Simpelstark nearly a year I believe. I am more than happy with it. I have 2 sets of speakers 1, 2 way with accuton drivers and a 3 way with 15" woofer. The amp is excellent with either pair. My reference amp is an Accuphase E-305 from about 1990. I have always liked the Accuphase but listen exclusively with the Simpelstark now.
I noticed the reference to the new Simpelstart on the VZ website and immediacy knew I would build it.
Thanks for a great amp.
Evan
I noticed the reference to the new Simpelstart on the VZ website and immediacy knew I would build it.
Thanks for a great amp.
Evan
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You know, the old Simpelstark AX2 (v1.3) has the famous decreasing harmonic profile, with dominant H2 between -73dB and -85 dB, probably the latest is a good compromise.
Simpelstark AX2 (V1.3) kit (2 x PCBs + parts) – Virtual Zero Audio Store
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@maty
I was comparing transformer based PSU with the SMPS there was direct difference in the HF response with the SMPS, with the transformer based PSU the sound was dry.
Thats my opinion and what I noticed. And it is not a reference to follow.
I was comparing transformer based PSU with the SMPS there was direct difference in the HF response with the SMPS, with the transformer based PSU the sound was dry.
Thats my opinion and what I noticed. And it is not a reference to follow.
It is known of my serious problems with the continuous in the electrical network that I suffer at home thanks to the electrical company. I have palliated it a lot, as well as the rest of my problems.
I decided that the next amp would use SMPS yes or yes. Of course, with quality components and with someone behind to answer my questions.
Off topic
The other day, after watching a video on YouTube, I discarded another class D, the Orchard Bosc. It is not the sound I want, and I am afraid the Purifi will sin the same, too clean a sound but not thrilling when listening to great recordings with great dynamic range and acoustic instrumentation (and unmanipulated vocals with the Autotune).
I decided that the next amp would use SMPS yes or yes. Of course, with quality components and with someone behind to answer my questions.
Off topic
The other day, after watching a video on YouTube, I discarded another class D, the Orchard Bosc. It is not the sound I want, and I am afraid the Purifi will sin the same, too clean a sound but not thrilling when listening to great recordings with great dynamic range and acoustic instrumentation (and unmanipulated vocals with the Autotune).
There are some testing going behind the scenes for many PURIFI setups, and it will remain hidden until I get the results.
Thanks
Thanks
To tell you the truth, the only reason forced me to use a linear PSU was some noise in idle buzz, after that, I had to use linear PSU to test and see if the SMPS is responsible for that noise.
When I started the music we both noticed that the sound is different, the HF was more open with the SMPS let say, I don't know if my description is true, but later I found that the source of noise is (my phone) is responsible for the noise, and immediately switched back to the SMPS to continue enjoying the music.
I am still telling you that this is my personal opinion.
However, when the phone (different one) was connected directly to the amplifier there was no noise at all, it was deadly silent. shown in the picture
Sam
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Some day when things finally slow down I still want to build two Simpelstark amps to compare side by side, one with conventional supplies and one with SMPS. The parts have been sitting here for a year already.
You know, the old Simpelstark AX2 (v1.3) has the famous decreasing harmonic profile, with dominant H2 between -73dB and -85 dB, probably the latest is a good compromise.
Simpelstark AX2 (V1.3) kit (2 x PCBs + parts) – Virtual Zero Audio Store
Hi Maty and All,
Just a clarification - the old V1.3 you mentioned, and V1.31, built by Cresnet, are actually the same. V31 has got some minor layout improvements for the builders' convenience, nothing more than that 😉
This amplifier is still my favourite in terms of the way it sounds, especially when listening to high-res acoustic recordings. The brain gets truly "fooled" by "naturality" of the sound reproduction 🙄
Cheers,
Valery
Valery,
Let me offer you a virtual Australian Platypus reward in recognition of your contributions to DIY art.....
A platypus is a high energy, amphibian mammal which never follows the crowd, looks like a chimera of beaver, duck and fish and lays eggs. A true hybrid, like your amplifier!
Hugh 😱 😉
Let me offer you a virtual Australian Platypus reward in recognition of your contributions to DIY art.....
A platypus is a high energy, amphibian mammal which never follows the crowd, looks like a chimera of beaver, duck and fish and lays eggs. A true hybrid, like your amplifier!
Hugh 😱 😉
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Hugh, thank you, Australian Platipus reward from you is truly an honor for me 😀
You're right - not following the crowd, trying some "crazy" things from time to time is my way of living 😉
This kind of approach allows for a higher "amplitude" of the results - the outcome is either very bad or much better than average.
And then you either learn from the failure or celebrate the success - both are good for me. No time for boredom 😛
Cheers,
Valery