Tachyon88
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And mind you, i have never broken anything in my life!
Not if you count yourself mucking up this thread with your pedantic and useless replies.
And mind you, i have never broken anything in my life!
Here you go. I would say that it is truly impressive what this little NCx500 module can do. 20Khz and 15Khz @ 500 watts with 0.0001% THD+N. Mind blowing. Haven't seen this with any other class D module on the market.
Regarding reproducibility: I can say we have stressed tested a few different NCx builds with the SMPS1200A700 and never had an issue leading to the SMPS "frying" itself. As of right now I am considering it a one off, which can happen unfortunately. Hence getting a new SMPS sent out right away per warranty.
Regarding a "beefier" SMPS....there are things in the works to possible switch away from all Hypex SMPS models, yes. But no timeline for that at all.
Dial back the attitude and snark or you will be removed from the conversation Sir.Well design your own good one...![]()
Will add, that the board designer tests Buckeye amps as white box, I test them as black box as a contract tester and Dylan tests operationally. As some here already know, I tested at 4 ohms and 2 ohms and attained the rated Hypex specs without issue. I tested 2 different Buckeye NCx500 amps and still use a stereo one in my reference system. My power tests are set to terminate at 1% THD though and it does not appear the OPs testing does.
As this is not his first destructive test, the OP should look harder at his test settings. For that matter, should try a Power vs THD (rather than THD+N). The amount of wiring for his dummy load (or something else) may be adding noise and could cause an early power test abort. Still would hope that the amp is robust enough to self protect, but amp protections are not designed to prevent every possible situation either.
The unit tested shutting down/limiting at 0.4% and from 10kHz and up according to the plots. A long way from 1%.
OK, but did not happen during my testing of comparable Buckeye amps. Amir will test one soon and will have another data point. Am confident, as in the past, his results will mirror my own. For that matter, Buckeye’s designer has not encountered major issues. This suggests the OP might need to consider how his testing differs.
So, Rick, just to confirm- you have tested these amplifiers at 8/4/2R full advertised rated continuous power into all frequencies up to and including 20kHz with correct calculation of the harmonics, to not exceed 1%THD? I have a few hopefully landing on my bench in the next few weeks, so it will interesting to see how our results compare.
The old FTC spec in US tried to deal with this issue but went overboard the other way. To me it looks these Purfi modules are designed to be Hi-Fi music amps... not PA amps or sine wave amps and certainly not designed for the old FTC test. However for playing music they seem perfectly fine with exceptional performance. Is there really any point to 700 watts @ 20 Khz for playing music? None that I can think of.Think all of this just goes to having a consistent spec amp to amp. Not crazy about the allusion to the capabilities of the module with vague spec....
Think all of this just goes to having a consistent spec amp to amp. Not crazy about the allusion to the capabilities of the module with vague spec....
I think that one of the key questions is how long every of this test lasts.
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Maybe we should not blame the messenger for exposing the obvious.More than that,we should embrace such efforts and thank both the reviewer and the owner who accepted to take that risk.
Is there really any point to 700 watts @ 20 Khz for playing music? None that I can think of.
Personally think it's bullshit as to application particularly. Nothing special about "hifi" outside of spec really, so sufficient spec is sufficient spec no matter how you use it. I have same issues when someone says gear is suited to "music" over all other audio requirements (even if they include music, such as movie soundtracks). A sub might be a good application to know what output details are for 20hz at various impedance loads, etc....The old FTC spec in US tried to deal with this issue but went overboard the other way. To me it looks these Purfi modules are designed to be Hi-Fi music amps... not PA amps or sine wave amps and certainly not designed for the old FTC test. However for playing music they seem perfectly fine with exceptional performance. Is there really any point to 700 watts @ 20 Khz for playing music? None that I can think of.
The flip side of that is if you have an amp that can produce 700 watts @ 20 Hz and "only" 325 watts @ 20 KHz is it reasonable to call it a 325 watt amp? These amps are designed to play music which has much higher power requirments at lower frequencies than high frequencies. The technology has gotten ahead of the marketing.There is no point to driving 100 mph in the U.S. on public roads, but if a car says it can do 100 mph on a closed track, I would be pretty upset if it could only do 65 mph and the engine blew at 90 mph.
There isn’t a tweeter that can handle the power output by the NCx500 but it doesn’t mean that you should advertise that it can…
Is there a point of going for better than 0.1% THD for playing music? The readership certainly votes down the gear that doesn’t hit this spec…
Sounds like a much more useful amp to me than the other way aroundThe flip side of that is if you have an amp that can produce 700 watts @ 20 Hz and "only" 325 watts @ 20 KHz
The old FTC spec is BS if you are trying to see how well an amp can actually play music. When I say Hi-Fi I mean it is desgined to play back recorded music not pass an arbitrary "test" which requires the same power produced at 20 Hz has to be produced at 20 Khz. I could argue making an amp that does this is a "bad" design. Why spend engineering effort and money on "solving" a problem that has nothing to do with playing back music?Personally think it's bullshit as to application particularly. Nothing special about "hifi" outside of spec really, so sufficient spec is sufficient spec no matter how you use it. I have same issues when someone says gear is suited to "music" over all other audio requirements (even if they include music, such as movie soundtracks). A sub might be a good application to know what output details are for 20hz at various impedance loads, etc....
Exactly, Oddly people seems to embrace that kind of rating with a lot passion, I don't know why. It seems to me that usually the ratings of class D are very optimistic with peak power ratings and sometimes 10% THD ratings, personally I go with the ''knee"... That said I'm not very trendy so I might be out of touch on this day and age.just like you used to be able to quote PMPO instead of RMS. But since there isn’t an ISO standard that I know of, maybe we need to decide what is reasonable to advertise and what isn’t.
No need for insults. An amp that can produce more LF power than HF power would be rated by its HF power according to the FTC test. An amp like this will indeed play music better than an amp with the same FTC power rating that plays LF and HF with the same amount power.The amp still plays "music" equally well....what the hell drugs are you on?
Exactly, Oddly people seems to embrace that kind of rating with a lot passion, I don't know why. It seems to me that usually the ratings of class D are very optimistic with peak power ratings and sometimes 10% THD ratings, personally I go with the ''knee"... That said I'm not very trendy so I might be out of touch on this day and age.