AudioArchitech
Senior Member
thanks, that helps to compare. yes, I use E30 in DAC mode too. Either the A08 is not as good as A07 or mine has issues. will warranty
Last edited:
I would say yes, and the one Allo is developing probably will be, also, but the $400+ price I've seen estimated makes it sound unappealing. The new Topping PA5 may or may not be basedon the 3255. If it is, it would essentially represent the pinnacle of what can be achieved with this chip family.Are the JLE 3255 really that much better?
been thinking of building a IcePower 200AS2 (TPA3255) $165 for the board (+ more $ for a case..). I'm guessing this is the sweet spot price/performance ratio. Hypex NC252MP looks great too but more $$I would say yes, and the one Allo is developing probably will be, also, but the $400+ price I've seen estimated makes it sound unappealing. The new Topping PA5 may or may not be basedon the 3255. If it is, it would essentially represent the pinnacle of what can be achieved with this chip family.
The Aiyima amps are great value, but they are budget products that deliver 80% of the sound quality for 20%-30% of what it costs to make a significant improvement.
Note: I'm not saying your amp isn't faulty. I was just addressing your question in a general sense.
Thx! very interesting!This is the result of "continuous power" test. The unit was switched on at idle conditions for 15 minutes (no input signal). Then it was tested by 1kHz sine wave at 2x75W/6.8ohm. The unit switched off itself (thermal shutdown) after 1 minute 38 seconds. Below is the signal record.
Next time it was after 2 min 50 sec. So it depends on chip/heatsink initial temperature as well.
At lower power, 2x38W/6.8ohm, it shuts down after 8 min 45 sec. So, what is the rated power of this amplifier??
Car analogy comes to my mind.
"My car has top speed of 120mph, however after running at 75mph it will stop with boiling coolant after 2 minutes. Not so bad in the town where we have 32mph limit - it is able to run almost 9 minutes at 38mph".
Wouldn't it be nice to have such specs?
Thx! very interesting!
that was with 50V10A power supply?
can u try the same with included power supply, or maybe u have another PSU with lower voltages?
thx! so I stand by my suggestion of using 24V10A PSU.Yes it was with 50V/10A power supply.
Some results with different power supplies you may find in this thread
AIYIMA A07 TPA3255 Amplifier Measurements and Review - LM4562 (and OPA2134) option
AIYIMA A07 TPA3255 Amplifier Measurements LM4562 option I received my A07 yesterday, on January 6, 2021, shipped from Italy. Purchased at Amazon.de and as stated on their website, it arrived without a power supply. I am testing the A07 with 2 different power supplies. One of them is a linear...www.audiosciencereview.com
And with 27V SMPS here
AIYIMA A07 TPA3255 amplifier with MW RS-100-24 SMPS power supply (measurements)
AIYIMA A07 TPA3255 Amplifier with MW RS-100-24 SMPS Power Supply I have just received the Mean Well RS-100-24 SMPS power supply, connected it to AIYIMA A07 and made a set of measurements and some listening. As the amplifier must be paired with a power supply and these 2 units make a complete...www.audiosciencereview.com
With the 27V SMPS, there was never a situation that the amplifier would shut down. But output power was of course reduced.
My A07 package did not contain any power supply, so I cannot try it with the factory supplied one.
My 50V/10A is my own produced linear power supply. The 27V SMPS is Meanwell RS-100-24, as you may see in the linked thread.
Lower PSU voltage means less amplifier maximum power but also less dissipated power, so the thermal shut down probability is lower or non-existent.
How long will your car last running in 1st gear and redline? 100000 miles, 10000 miles, 1000 miles, or 100 miles?Car analogy comes to my mind.
"My car has top speed of 120mph, however after running at 75mph it will stop with boiling coolant after 2 minutes. Not so bad in the town where we have 32mph limit - it is able to run almost 9 minutes at 38mph".
Wouldn't it be nice to have such specs?
Higher PSU voltage would give you a reserve for power short-time peaks. So depends what you need.thx! so I stand by my suggestion of using 24V10A PSU.
power is useless without proper radiator.
I was just checking out the Aiyima A07 on Amazon and read this:
This is a A07 chart showing how to choose the power supply and Speaker
Based on what?thx! so I stand by my suggestion of using 24V10A PSU.
power is useless without proper radiator.
It is your amp. You are welcome to use any PSU you like, and I can't see that making anyone else unhappy. We just provide info so that anyone reading this thread can make informed decisions. Please do note that this chip does not support less than 3.4 ohm minimum impedance in BTL mode, so if you have a speaker that dips to 2 ohms, you should choose a different amp.sorry if I make u guys unhappy. Yes, I had a spare 24V10A PSU. And no, I don't need more voltage. My normal volume pot position is at 9-o-clock with my 2 tower JBL Stage A170 speakers. At 11-o-clock it becomes unbearably loud. And it can go up to 3-o-clock.
Here's what I know about volts vs ampers in PSUs - in good PSUs voltage won't sag (they have stabilizers for it), so your amp will never be affected by "not enough voltage", you just won't get enough gain (enough loudness in your speakers).
However, especially with impedance in speakers going as low as 2 Ohm depending on frequency, your amp will try to draw a higher current (needing more ampers), and if PSU cannot provide it, you will get a "distortion".
The same "philosophy" applies to PC PSUs, surprizingly. They all can supply a standard voltage. It is how many max ampers they provide make their "wattage" number - like 1000W PSU. And guess what those new GPUs and CPUs need? More current.
in case of A07 - more voltage is more harmful, as it produces more heat, so much that amp will shutdown itslef. So decision is very simple - get less volts, and more ampers.
Thx, pma, again - for doing a research with those 36V PSUs.
Wrong. the gain is fixed and not affected by the input voltage.you just won't get enough gain (enough loudness in your speakers).
Also Wrong.However, especially with impedance in speakers going as low as 2 Ohm depending on frequency, your amp will try to draw a higher current (needing more ampers), and if PSU cannot provide it, you will get a "distortion".
You can uses this chip amp to power a 1 Ohm load with no problem as long as you don't exceed its rated Output current.Please do note that this chip does not support less than 3.4 ohm minimum impedance in BTL mode, so if you have a speaker that dips to 2 ohms, you should choose a different amp.
Thank you for that articulate, intelligent and informed post. The world now knows that Purify amps suck and Aiyima is simply the best amplifier ever made. Your measurement instrumentation and blind listening/comparison techniques are extraordinary, and your supporting evidence is indisputable...Repeat..the aiyima 07 is the best amp ever....the best class D amp...hifi at its best....got 6 sets speakers,kef wharfedale philips etc.
The purify hpa-s 400 classD sounds not so good ....theire are 7 years old.
And speakers below the 2 ohm don't exist....the boy KMA talks bla bla bla he is lying all the time.....its all fake.