Aiyima A07 Pro Amplifier Review

[morozzz_2003]

Not true.

At least not in my case. Received from Amazon yesterday. From the *official Aiyima store*.

Amazon.ca

Aiyima A07 Pro. Assuming it is the most current version.

The 3.5mm Aux out is DEFINITELY NOT controlled by the front volume knob. Useless as a sub out, basically.

Same deal with the Aiyima A07 Max.

Just a fixed-level out signal! Even when unit is turned off.

Bummer

They have been correcting description on product page! =) -

• 【Upgrded】New capacitor 63V and Optimized 3.5mm output is controlled

 

[konstaver]

I found this forum by chance. I am the owner of the a07 pro, I bought it in April. A 48v 12.5A power supply unit was purchased separately for it. When listening, after a short time, the amplifier began to go into "protection". My review on Aliexpress was not published.... Correspondence with the seller and the manufacturer did not give anything. Stupid and stupid correspondence for 2 weeks, with the manufacturer. They do not want to confirm that the amplifier does not work 48v. The problem was the overheating of the u4 (xl 7005), it warmed up like an iron. Everything else is within the normal range. The seller said power supply is powerful, take 48v 5A . But the amplifier heats up at idle, the power supply has nothing to do with it. In general, a little tuning of the amplifier. 1.Replacing XL 7005 with 7015e1. (after replacement, there is no overheating, barely warm) 2. Replacing the radiator with a radiator with cooling.(Powered by 5v from 7805) 3. Modification of the housing for new cooling. So far, everything is powered by 48v. The measurement on the power supply was up to 8.5 A, with comfortable listening. And this is ~ 200W per channel.

 

[Guddu]

I found this forum by chance. I am the owner of the a07 pro, I bought it in April. A 48v 12.5A power supply unit was purchased separately for it. When listening, after a short time, the amplifier began to go into "protection". My review on Aliexpress was not published.... Correspondence with the seller and the manufacturer did not give anything. Stupid and stupid correspondence for 2 weeks, with the manufacturer. They do not want to confirm that the amplifier does not produce a 48v ari. The problem was the overheating of the u4 (xl 7005), it warmed up like an iron. Everything else is within the normal range. The seller said bp is powerful, take 48v 5A . But the amplifier heats up at idle, the power supply has nothing to do with it. In general, a little tuning of the amplifier. 1.Replacing XL 7005 with 7015e1. (after replacement, there is no overheating, barely warm) 2. Replacing the radiator with a radiator with cooling.(Powered by 5v from 7805) 3. Modification of the housing for new cooling. So far, everything is powered by 48v. The measurement on the power supply was up to 8.5 A, with comfortable listening. And this is ~ 200W per channel.

Welcome to ASR!

how did you power up the fan on heatsink?

 

[konstaver]

It's simple, stabilizer 7805, 2pin(minus, or locked on the board), 3 pin +5v

 

[Guddu]

It's simple, stabilizer 7805, 2pin(minus, or locked on the board), 3 pin +5v

Cool, I meant to ask onboard or external.

 

[konstaver]

Internal

 

[morozzz_2003]

I found this forum by chance. I am the owner of the a07 pro, I bought it in April. A 48v 12.5A power supply unit was purchased separately for it. When listening, after a short time, the amplifier began to go into "protection". My review on Aliexpress was not published.... Correspondence with the seller and the manufacturer did not give anything. Stupid and stupid correspondence for 2 weeks, with the manufacturer. They do not want to confirm that the amplifier does not work 48v. The problem was the overheating of the u4 (xl 7005), it warmed up like an iron. Everything else is within the normal range. The seller said power supply is powerful, take 48v 5A . But the amplifier heats up at idle, the power supply has nothing to do with it. In general, a little tuning of the amplifier. 1.Replacing XL 7005 with 7015e1. (after replacement, there is no overheating, barely warm) 2. Replacing the radiator with a radiator with cooling.(Powered by 5v from 7805) 3. Modification of the housing for new cooling. So far, everything is powered by 48v. The measurement on the power supply was up to 8.5 A, with comfortable listening. And this is ~ 200W per channel.

Many owners tells that NOT TO USE 48 v power supply! I have bought 36 v only by recomendation! 48 v extremally heating even stand by\low volume! Maximum 36 v 10 a... Alternative - lowering voltage to 42 v approx...
Difference in converters is output current:
7005 - Maximum 0.4A
7015 - Maximum 0.8A

 

[konstaver]

I believe it can be used on 48v. Only after replacing the xl7005 stabilizer. In standby mode, only it was heated, it is started through a nce60p25k field-effect transistor, as a result, at its input (between - and +) after the transistor at 48v, 63v is obtained. That's why he gets very warm. All other elements are barely warm. Yes, 3255 is still warming up! But this is already with an increase in power.

 

[konstaver]

Many owners tells that NOT TO USE 48 v power supply! I have bought 36 v only by recomendation! 48 v extremally heating even stand by\low volume! Maximum 36 v 10 a... Alternative - lowering voltage to 42 v approx...
Difference in converters is output current:
7005 - Maximum 0.4A
7015 - Maximum 0.8A

The difference in the stabilizers in power and in the housing, 7015 is several times greater, respectively, the heat dissipation is much better.

 

[morozzz_2003]

I believe it can be used on 48v. Only after replacing the xl7005 stabilizer. In standby mode, only it was heated, it is started through a nce60p25k field-effect transistor, as a result, at its input (between - and +) after the transistor at 48v, 63v is obtained. That's why he gets very warm. All other elements are barely warm. Yes, 3255 is still warming up! But this is already with an increase in power.

Yes it`s can work on 48v, but at the limit of possibilities... and very high risk of damage!
There are no one components to change for safe work on 48v! Electric components diagram needed... I think so...
Wattage on 36v\10a is safe, enough power for size\price!

 

[CassilinRyan]

Yes it`s can work on 48v, but at the limit of possibilities... and very high risk of damage!
There are no one components to change for safe work on 48v! Electric components diagram needed... I think so...
Wattage on 36v\10a is safe, enough power for size\price!

Agreed, this is more than enough power for most home audio speakers

 

[CassilinRyan]

I found this forum by chance. I am the owner of the a07 pro, I bought it in April. A 48v 12.5A power supply unit was purchased separately for it. When listening, after a short time, the amplifier began to go into "protection". My review on Aliexpress was not published.... Correspondence with the seller and the manufacturer did not give anything. Stupid and stupid correspondence for 2 weeks, with the manufacturer. They do not want to confirm that the amplifier does not work 48v. The problem was the overheating of the u4 (xl 7005), it warmed up like an iron. Everything else is within the normal range. The seller said power supply is powerful, take 48v 5A . But the amplifier heats up at idle, the power supply has nothing to do with it. In general, a little tuning of the amplifier. 1.Replacing XL 7005 with 7015e1. (after replacement, there is no overheating, barely warm) 2. Replacing the radiator with a radiator with cooling.(Powered by 5v from 7805) 3. Modification of the housing for new cooling. So far, everything is powered by 48v. The measurement on the power supply was up to 8.5 A, with comfortable listening. And this is ~ 200W per channel.

That's cool, What diameter is the hole in your side?

 

[konstaver]

7.5 мм

 

[morozzz_2003]

For information - some people told that aux output is too low voltage... i have bought sub - Klipsch R-8SW, gain level is 1\4 -

 

[xyomguix]

I found this forum by chance. I am the owner of the a07 pro, I bought it in April. A 48v 12.5A power supply unit was purchased separately for it. When listening, after a short time, the amplifier began to go into "protection". My review on Aliexpress was not published.... Correspondence with the seller and the manufacturer did not give anything. Stupid and stupid correspondence for 2 weeks, with the manufacturer. They do not want to confirm that the amplifier does not work 48v. The problem was the overheating of the u4 (xl 7005), it warmed up like an iron. Everything else is within the normal range. The seller said power supply is powerful, take 48v 5A . But the amplifier heats up at idle, the power supply has nothing to do with it. In general, a little tuning of the amplifier. 1.Replacing XL 7005 with 7015e1. (after replacement, there is no overheating, barely warm) 2. Replacing the radiator with a radiator with cooling.(Powered by 5v from 7805) 3. Modification of the housing for new cooling. So far, everything is powered by 48v. The measurement on the power supply was up to 8.5 A, with comfortable listening. And this is ~ 200W per channel.

Thanks for posting this. On my brand new A07 pro bought on Aiyima official store from aliexpress with the 48V power supply, I think I have the same protection mecanism see this video

Is there any mod that do not require precise soldering ?

 

[konstaver]

I had exactly the same problem. There were pops when overheating. 2 - solutions 1) - 36V power supply, power loss. And it's not a fact that the same problem won't appear. 2) - replacement of the 7005 stabilizer with a more powerful 7015. Unfortunately, there is NO easy installation of the stabilizer.

 

[sensation_lite]

Good evening. I have the same problem with turning off with a clap on the speakers. Power supply 48v. Sechay took it apart and connected the speakers, which I don’t mind. In the photo I highlighted that it gets very hot when powered at 20V. Tell me, if I replace 7005 with 7015, will the problems with overheating on other elements go away?
P.S. Sorry if it’s not clear, I’m using a translator, I found this forum with a similar problem.

 

[konstaver]

Hi. Yes, when replacing with 7015, the problem with pops should go away. All other elements shown in the photo are heated, but to the operating temperature. They don't need to be replaced on my amplifier. Change it at the beginning of 7015, then look at these heating elements. Also put the cooler on the case + tda.

 

[Multicore]

Does anyone know how to put it in Bluetooth pairing mode?

 

[Jstary01]

Это обзор и подробные измерения стереоусилителя AIYIMA A07 Pro. Он был любезно доставлен мне одним из участников и стоит около 90 долларов.
View attachment 286715
Как вы видите, отличительным фактором от некоторых других усилителей Aiyima является наличие регуляторов тембра. Увы, в этом же заключается и проблема этого устройства: нет фиксатора и нет возможности установить его отклик на ровный уровень. Хуже того, небольшие изменения на циферблатах приведут к большим различиям в тональности. Поэтому, хотя мне нравится иметь регуляторы тембра, мне определенно хотелось бы видеть функцию отмены тембра. В остальном устройство приятно использовать и эксплуатировать. Как обычно, блок питания намного больше самого усилителя:
View attachment 286716

Измерения AIYIMA A07 Pro
Как обычно, мы начинаем с нашей панели с тоном 1 кГц на чистой нагрузке 4 Ом, работающей в режиме стерео при мощности 5 Вт:
View attachment 286717

Мы ожидаем хороших результатов от AIYIMA, и мы их получаем:

View attachment 286719

Переключившись на мой PowerCube Loadbox, мы можем моделировать более сложные нагрузки: (протестирован 1 канал)
View attachment 286720

Как видите, производительность по сути та же самая.

Шумовые характеристики достаточно хороши для этого класса бюджетных усилителей:
View attachment 286721

Multitone демонстрирует хорошие показатели:
View attachment 286722

К сожалению, частотная характеристика зависит от нагрузки (динамика):
View attachment 286723
Поэтому вам, возможно, придется использовать регулятор высоких частот, чтобы настроить высокочастотную характеристику вашего динамика.

Перекрёстные помехи очень хорошие:
View attachment 286724

Давайте рассмотрим все важные измерения мощности, начав с 4 Ом:
View attachment 286725

View attachment 286726

Этого вполне достаточно для настольного использования. Переход на 8 Ом, естественно, лишает нас изрядного количества мощности:
View attachment 286727

К счастью, подавляющее большинство динамиков на рынке имеют номинальное сопротивление 4 Ом.

Чтобы оценить устойчивость усилителя, давайте подвергнем его воздействию ряда нагрузок и реактивных компонентов:
View attachment 286728

Идеальный усилитель будет следовать красной линии. По сути, мы там и для 8, и для 4 Ом. Удивительно, но этот маленький усилитель умудрился продолжать работать и при 2 Ом, хотя и без емкостной составляющей и некоторого падения мощности. Многие усилители просто выключаются и не работают даже при 2 Ом.

Редактировать: вот ответ в зависимости от частоты, который я забыл опубликовать изначально:
View attachment 287021

И наконец, вот профиль разминки:
View attachment 286729

При использовании усилитель работал довольно прохладно.

Выводы
AIYIMA A07 Pro продолжает традицию компании, предлагая компетентные уровни шума и искажений, хорошую мощность и очень разумную цену. Хотя регуляторы тембра являются приятной дополнительной функцией, у них нет переключателя отключения. И у нас есть наша обычная зависимость от нагрузки.

Лично мне очень не нравится отсутствие регулировки тембра, поэтому я не куплю его. Но если вас это не смущает, то AIYIMA A07 Pro — еще одна хорошая сделка в области стереоусиления.

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Как всегда, вопросы, комментарии, рекомендации и т. д. приветствуются.

Любые пожертвования будут высоко оценены по ссылке : https://www.audiosciencereview.com/forum/index.php?threads/how-to-support-audio-science-review.8150/

Переменный резистор уровня громкости отвратительный!!!! А в общем не плохой усилитель за 50 долларов.