Alan Marchwrote: @SmartOne_2000@Oniiz86
I thought I would refresh my memory regarding this customer and the correspondence that occurred.
He claims the amp failed in January 2024, yet he states in his email received on the 13th of February that it failed "yesterday". More than 2 months out of warranty.
You can see my reply. I responded within 2 hours, so not slow to reply as he claims. This is the only correspondence I can find from him. I can find no reply to my email, and no further emails to him from me. I expect at the time I assumed the fix worked, or he found it was some unrelated problem. What am I supposed to do if he didnt correspond further? What's clear is that he is making things up.
I see it was out of its 3 year warranty (by 2 months) so the shipping costs should have been borne by him, if he needed it repaired by you. I believe he said he found someone local to do the repair job for him, rather than pay the costs to you.
Congratulations on the excellent review pf the P801. Maybe have these amps reviewed by Gene from Audioholics or even Stereophile? These are long standing and well respected magazines by the audio community worldwide. I'm sure there others in Europe I may be missing.
SmartOne_2000wrote:
I see it was out of its 3 year warranty (by 2 months) so the shipping costs should have been borne by him, if he needed it repaired by you. I believe he said he found someone local to do the repair job for him, rather than pay the costs to you.
Yes, and thats fair enough, his choice. However for him to make out that we didnt try to help, were being unreasonable or that he had some right to a free repair or shipping, is just plain dishonest.
SmartOne_2000wrote:
Congratulations on the excellent review pf the P801. Maybe have these amps reviewed by Gene from Audioholics or even Stereophile? These are long standing and well respected magazines by the audio community worldwide. I'm sure there others in Europe I may be missing.
Thank you. Yes, lots of opportunities for reviews. We have expansion plans 😉.
1. You were quoted as saying the P801 idles at 15 Watts. But the Purifi 9040BA module has a power loss at idle (0 output power) of 5 Watts, assuming it obeys datasheet specs. Is the remaining 10 Watts from the power supply at idle? That seem a bit much, no? If so, can further optimizations reduce that number? I assume the Ultra Buffer board power consumption at idle is negligible.
2. The P801 has a standby power of 0.3W (meeting EU's 2027 requirements). So, why didn't the P801 go into standby mode when it was left idling overnight, having not played for many hours as the reviewer indicated? Doesn't a long term idling of 15W imply it never enter standby mode? Thx!
SmartOne_2000wrote:
Hey Alan, a few questions from the review:
1. You were quoted as saying the P801 idles at 15 Watts. But the Purifi 9040BA module has a power loss at idle (0 output power) of 5 Watts, assuming it obeys datasheet specs. Is the remaining 10 Watts from the power supply at idle? That seem a bit much, no? If so, can further optimizations reduce that number? I assume the Ultra Buffer board power consumption at idle is negligible.
2. The P801 has a standby power of 0.3W (meeting EU's 2027 requirements). So, why didn't the P801 go into standby mode when it was left idling overnight, having not played for many hours as the reviewer indicated? Doesn't a long term idling of 15W imply it never enter standby mode? Thx!
That was a rough number. I will get an accurate number for you. But yes, PSU, buffer etc all contribute to idle consumption. Its not really a lot of power consumption at idle. My view is also that users do need to take some responsibility. If you have finished using the amp, switch it off into standby! There is no benefit to sound quality to leave the amp on and "warmed up".
We have not implemented an idle auto switch off mechanism. It would be like the audio auto sense that some others implement and unreliable.
Alan Marchwrote:
That was a rough number. I will get an accurate number for you. But yes, PSU, buffer etc all contribute to idle consumption. Its not really a lot of power consumption at idle. My view is also that users do need to take some responsibility. If you have finished using the amp, switch it off into standby! There is no benefit to sound quality to leave the amp on and "warmed up".
We have not implemented an idle auto switch off mechanism. It would be like the audio auto sense that some others implement and unreliable.
1. The amp switch off to standby can be done via triggers or front panel power button?
2. Does the power button only have one color (red) or does the color change depending on the power status? E.g. Red for normal, Blue for standby.
SmartOne_2000wrote:
1. The amp switch off to standby can be done via triggers or front panel power button?
2. Does the power button only have one color (red) or does the color change depending on the power status? E.g. Red for normal, Blue for standby.
1. Yes
2. There are only 2 states, off (standby 0.3 watts) and on. Therefore the light is either on or off.
Have you ever measure the idle temperature on the top of the amp that the reviewer said was warm to the touch? "Warm to the touch" can be a rather subjective observation. Not sure if the amps were tested in the open or were in a rack or enclosure of some kind.
SmartOne_2000wrote:
Have you ever measure the idle temperature on the top of the amp that the reviewer said was warm to the touch? "Warm to the touch" can be a rather subjective observation. Not sure if the amps were tested in the open or were in a rack or enclosure of some kind.
14.6 watts, I was close.
Regarding temps, yes we have measured and they run what I would subjectively term as cool. Lets back that up with data.
As you know we are based in a rather hot part of the world. We have recently experienced several 45 degrees C days (113 deg F). It's a mild 34 deg today. As such I will first measure the ambient temp in the room, and the amp before it is switched on.
So 25.3 deg C.
I will turn it on and come back in a couple of hours.
BTW the first picture is measuring black electrical tape on the desk as you need a black surface to accurately measure IR temp. Search emissivity.
Regarding temps, yes we have measured and they run what I would subjectively term as cool. Lets back that up with data.
As you know we are based in a rather hot part of the world. We have recently experienced several 45 degrees C days (113 deg F). It's a mild 34 deg today. As such I will first measure the ambient temp in the room, and the amp before it is switched on.
288
289
So 25.3 deg C.
I will turn it on and come back in a couple of hours.
BTW the first picture is measuring black electrical tape on the desk as you need a black surface to accurately measure IR temp. Search emissivity.
Thanks! I appreciate the efforts to make these measurements.
BTW, might you want to consider adding IMD specs to your amplifier spec pages so that you may have complete low and high frequency specs (50W + 50W) as shown in post 12? That would be great!
