I can set button on 9 o'clock or just spin it before power on, result be the same, it's warm up without any signal, DAC is off, only amplifier turn on.I have to say, termometre wire not fix on the case just put it between down part if case and table, today i gonna stick it to case and i think we see higer temperature.
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Aiyima A07 Max - Aiyima's new TPA3255 amplifier with mono/stereo output
- Thread starter Guddu
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43c like 10cm or 4in away from the body seems a bit excessive but people did not state their ambient temp.
just as an aside i have a 120w class a/b i let run 24/7 and now its 19" where I am and the unit is always room temp but it has a alloy front and internal heat sink to get rid of heat
this one bears investigating?
just as an aside i have a 120w class a/b i let run 24/7 and now its 19" where I am and the unit is always room temp but it has a alloy front and internal heat sink to get rid of heat
this one bears investigating?
In room temperature 23c
Meloman, what you are seeing is the "idle power" loss. Many (all?) amplifiers consume some power while idle (no music playing). This power is lost as heat, and some times is significant.
That said, that the temperature reaches "frying an egg" level might be a bit too much.
Yes we discuss this question in first i think 48V 5A PSU for this amplifier is necessary, i scary what happen with amplifier with 48V 10A.In my previous FX Audio D 802 i set volume to 18 from 99 posible on display, it output power on 18 the same like Aiyima at 12 o'clock, i dont know wat to say.
My Fosi V3 with 48V power supply gets slightly warm to the touch when driving 6 Ohm floor standing speakers loud, certainly no warmer than any number of Class AB amps I've had in my main system.
Are there some users who believe there should be an amp that costs $100, drives large speaker loads AND doesn't get warm to the touch? I've owned a lot of amps over the years and never had one that stayed completely cool while in use.
Regarding posts above with pictures of a temperature probe reading 42C/107F, that's barely warm to the touch. Why do I see people talking about frying eggs and whatnot? There are VERY few amps of any class that won't get to those temps on the case, certainly around any vents. From what I've read the A07 Max is Aiyima aping the Fosi V3 with an added mono function. If it uses the same slab/case cooling mechanism I find it hard to believe that running 48V should cause concern. Like I said above, my V3 with 48V does not run hot, not at all and I have read about no users having heat problems with these latest TPA3255 models.
Last, if you cannot get enough volume out of one of these little buggers, learn more about gain structure and source signal strength. One of the beauties of old stereo separates was the requirement to learn a little about matching signal strength between pre and power amp, gain settings versus volume knob positioning, etc.
Are there some users who believe there should be an amp that costs $100, drives large speaker loads AND doesn't get warm to the touch? I've owned a lot of amps over the years and never had one that stayed completely cool while in use.
Regarding posts above with pictures of a temperature probe reading 42C/107F, that's barely warm to the touch. Why do I see people talking about frying eggs and whatnot? There are VERY few amps of any class that won't get to those temps on the case, certainly around any vents. From what I've read the A07 Max is Aiyima aping the Fosi V3 with an added mono function. If it uses the same slab/case cooling mechanism I find it hard to believe that running 48V should cause concern. Like I said above, my V3 with 48V does not run hot, not at all and I have read about no users having heat problems with these latest TPA3255 models.
Last, if you cannot get enough volume out of one of these little buggers, learn more about gain structure and source signal strength. One of the beauties of old stereo separates was the requirement to learn a little about matching signal strength between pre and power amp, gain settings versus volume knob positioning, etc.
It's strange that the temperature remains the same both with and without a signal. On the touch it is a little hot, I don't stick the temperature sensor just put it. I started it after reading on this forum about capacitors 50V with PSU 48V its not good, Fosi uses 63V capacitors. Ok, let it be how it is.
Has anyone read any reports of any of these TPA3255 units smoking, burning, failing at an excessive rate? I follow several forums and I don't see anything indicating such, for any of these models. I have read that the old Aiyima A07 will shut itself down when powered with 48V and pushed, but that is a positive protective feature of the TPA3255 IMO.
Also, @Meloman you noted temperatures hot enough to fry eggs when plugging 48V into your A07 Max, but all of the pics you showed here are at low temperatures. 40C, plus or minus a degree or two, is not hot for an amplifier. Do you have pics of the amp at much higher temps?
Also, @Meloman you noted temperatures hot enough to fry eggs when plugging 48V into your A07 Max, but all of the pics you showed here are at low temperatures. 40C, plus or minus a degree or two, is not hot for an amplifier. Do you have pics of the amp at much higher temps?
I believe that when we attach the sensor to the case, we can observe a higher temperature. As I mentioned earlier, the sensor was placed between the amplifier case and the table, and it measured the air temperature between the table and the amplifier case. When I tried to touch it with my hand, it felt hotter than 42°C.
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Guddu
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@Toku has clarified this already nicely, but I would also pitch in without disagreeing with anyone or anything you all are observing.
Why would you think the amplifier chassis getting a bit hotter is an issue while it is designed to do so.
Amplifier chassis is super compact and doesn’t use bigger heatsink. It uses chassis for heat management.
This is expected behavior, unless it really gets hot to problematic levels (like 50-60 degrees plus).
Bigger yamaha (I have one), Sony and other integrated amplifiers get hotter even though they use bigger chassis and heatsinks.
I have recently added Topping PA7 to my desk, which uses 48v 5a psu, and it gets hotter than A07 max with 48v psu.
Both A07 Max and PA7, with 48v 5a psu, use 8 - 14w (7-8w for A07 max, 13-14w for PA7) at idle and remains there when playing upto certain spl levels.
If someone decides to go for A07 Max with 48v psu, ideally you should use 40v or less, then should expect it to run a bit hotter. Using a riser to make up some space between amplifier chassis bottom and stand/table helps (Just physics).
Why would you think the amplifier chassis getting a bit hotter is an issue while it is designed to do so.
Amplifier chassis is super compact and doesn’t use bigger heatsink. It uses chassis for heat management.
This is expected behavior, unless it really gets hot to problematic levels (like 50-60 degrees plus).
Bigger yamaha (I have one), Sony and other integrated amplifiers get hotter even though they use bigger chassis and heatsinks.
I have recently added Topping PA7 to my desk, which uses 48v 5a psu, and it gets hotter than A07 max with 48v psu.
Both A07 Max and PA7, with 48v 5a psu, use 8 - 14w (7-8w for A07 max, 13-14w for PA7) at idle and remains there when playing upto certain spl levels.
If someone decides to go for A07 Max with 48v psu, ideally you should use 40v or less, then should expect it to run a bit hotter. Using a riser to make up some space between amplifier chassis bottom and stand/table helps (Just physics).
@guddu I tried using it, but unfortunately, it did not help with the cooling. I am now considering the possibility that if the amplifier chassis were bigger, it might have a positive effect on cooling. Perhaps I made a mistake somewhere along the line, as I have another amplifier that does not get hot and I believe that class D amplifiers are not supposed to get too hot either.
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Guddu
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Perhaps this one isn’t best fit for you, but you should try 36v 6a psu with it as you already have the amplifier. You may not even need to go with 48v psu if your pre-amp/DAC is goo enough to output around 2v.
PE: what’s your pre-amp or DAC, if you don’t mind telling your setup.
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Guddu
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And on a lighter note, there are people who won’t even start listening until their gear is fully warmed up (properly heated), they even leave it running for 10-15 min before they start to play. Several tube amps, class A & A/B types.
Тoday i try 32V PSU, the volume level the same, no difference, only low frequencies is a better on 48 PSU.
AIYIMA A07 MAX VS Fosi Audio V3
why is there such a price difference on amazon $92 (shipping a little high) amazon.de 129 € with a 10% discount still more than 110 eurosEven $110 is only 103€ if price where the same but shipping across europe where half price of amazon.com it could be under 100 euros
Ps 103 euros is what is what a Fosi audio v3 costs at audiophonics with a 48v 5 power supply (with a discount and a 32v psu 95€ on amazon.de)https://www.audiophonics.fr/en/inte...d-amplifier-tpa3255-2x225w-4-ohm-p-17954.html
what ? Import fee and shipping ? Where ?
AIYIMA A07 MAX on audiophonic no powersupply 78 €
AIYIMA A07 MAX Stereo / Mono Class D Amplifier TPA3255 2x225W 4 Ohm / 1x315W 4 Ohm - Audiophonics
This Class D Aiyima A07 MAX amplifier features a stereo and mono mode for daisy-chaining multiple A07 amplifiers for more power. It reaches a power of 2x225W @ 4Ω in stereo or 1x450W @ 4Ω in mono thanks to its TPA3255 chip.
www.audiophonics.fr
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