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This I can confirm as true.would suspect that Purifi uses a bench supply that would show the best amplifier performance rather than be potentially limited by a specific vendor's supply.
This I can confirm as true.would suspect that Purifi uses a bench supply that would show the best amplifier performance rather than be potentially limited by a specific vendor's supply.
The SMPS1200 is designed with a selectable input voltage range, allowing it to accommodate various power input specifications.
2 x 31 (Min), 2 x 40 (Typ), 2 x 46 (Max) Vdc - [B]Proportional ta [SIC] AC Mains[/B]
Additionally, the SMPS1200 boasts an advanced overcurrent protection mechanism that, during a temporary overload, restricts the output current.
This is clear from the datasheet plots. And also the reason why datasheet specs cannot be automatically used as OEM amp specs.This I can confirm as true.
Yet you stated that your very recent tests showed power as being 700 watts at 4 ohms with 1% distortion
Once final testing is done, absolutely.OK, so are you saying that this amp delivers the stated spec?
Can you post the data where you verified that?
Perhaps @restorer-john can correct me, because he's had a much wider range of devices on the bench than I have or @SIY , but I seem to recall throughout history that most domestic power amplifiers have non-regulated supplies feeding the output, current-delivery stage. This is why recovery from impulse is a useful test for showing PSU lag etc.
No, we did, back when we had the AP. But doing new round of testing since the Stereophile article because......well, self-explanatory.Final testing? So you haven't run a full power sweep yet? You didn't test and characterise the amp before the power and other numbers went on the website and it went on sale?
Feel free to dig back through the official thread in the Dealer section. You had already seen the graphs in question and decided to look elsewhere.So you did run power tests. Did they meet the spec you published? Can you post them?
They use a PSU of adequate capacity for spec'ing their own modulesFor that matter, would suspect that Purifi uses a bench supply that would show the best amplifier performance rather than be potentially limited by a specific vendor's supply.
Fully agree - the PSU used in the unit must be what is used to derive all published specs of the unit as a whole - up to and including limits in the lowest octave IMNSHO...This is clear from the datasheet plots. And also the reason why datasheet specs cannot be automatically used as OEM amp specs.
I don't know about the models you mention,but one of the first NADs using Purifi nearly gave up the ghost trying to drive loud (with 5 people in a big-ish room) the small 3-way ATCs (50 must be) some 3-4 years ago.This is exactly one of the questions that should be asked. I pointed out years ago that a NAD M23/M33, for example, has a significantly larger PSU for the smaller 1ET400A.
What happened? Did it recover or was it permanently damaged?nearly gave up the ghost
The room started smelling electronics and it was really hot to touch.What happened? Did it recover or was it permanently damaged?
A 150-200wpc integrated could not drive 85dB/1M 9" 3-ways to venue-esq levels? Shocked... KH150's have 245W ea and will certainly not fill a large room w/o stressing hard, and even have a higher max rated SPL than those ATC's... I'm sure that amp was being abused for the sake of trying to get somewhere that system was not designed to go...I don't know about the models you mention,but one of the first NADs using Purifi nearly gave up the ghost trying to drive loud (with 5 people in a big-ish room) the small 3-way ATCs (50 must be) some 3-4 years ago.
I would test before buy in such case.
Stop badgering please .Final testing? So you haven't run a full power sweep yet? You didn't test and characterise the amp before the power and other numbers went on the website and it went on sale?
I think that the added problem apart from level,distance,etc at such listening are people.A 150-200wpc integrated could not drive 85dB/1M 9" 3-ways to venue-esq levels? Shocked... KH150's have 245W ea and will certainly not fill a large room w/o stressing hard, and even have a higher max rated SPL than those ATC's... I'm sure that amp was being abused for the sake of trying to get somewhere that system was not designed to go...
But I will agree with you - I'm not a NAD fanboi after a horrible experience with the T175 and T175HD (lost over $3K on that), and another NAD integrated that died. But they do seem to use over-designed PSU's - I guess that's something to be praised.
NAD has always taken a slightly different approach. While they haven't always gotten everything perfect, my experience with them has been positive in terms of delivering a lot of power for the price. That said, I don’t have any experience with their newer class-D models.A 150-200wpc integrated could not drive 85dB/1M 9" 3-ways to venue-esq levels? Shocked... KH150's have 245W ea and will certainly not fill a large room w/o stressing hard, and even have a higher max rated SPL than those ATC's... I'm sure that amp was being abused for the sake of trying to get somewhere that system was not designed to go...
But I will agree with you - I'm not a NAD fanboi after a horrible experience with the T175 and T175HD (lost over $3K on that), and another NAD integrated that died. But they do seem to use over-designed PSU's - I guess that's something to be praised.
Yes,their old budget one must be a benchmark along with the small Yamaha's for entry level audio back in the day.NAD has always taken a slightly different approach. While they haven't always gotten everything perfect, my experience with them has been positive in terms of delivering a lot of power for the price. That said, I don’t have any experience with their newer class-D models.
And soon we'll have more data to show once revised testing is finished. Feel free to check back then if you are still concerned.Actually I missed the power curves, but have seen them now.
Hence the expression, “It has the NADs”…This is exactly one of the questions that should be asked. I pointed out years ago that a NAD M23/M33, for example, has a significantly larger PSU for the smaller 1ET400A.