coilcraft is very nice. as i remember texas instruments are using them in their demo board. würth also has a high quality inductor at the same level of quality. pimping the output filter with lower inner resistance should give you better dynamic control and less distortion at higher output power. very good choice. regarding changing caps, i always look at the panasonic low esr types ike fc or fm series.
Class D has the problem that the distortion above 6khz increases too much if the volume increases. With the AB class it is possible to easily obtain a distortion of less than 0.1% up to 70% of the maximum power. With class D, distortion above 10khz increases terribly over 25% of the maximum power. Using a more powerful power supply, the phenomenon is reduced but does not disappear. Fortunately, it is rare to exceed 10 watts to listen to home. TPA3255 has a particular feedback system that reduces some defects in class D, so you can expect 10 watts clean at 20khz (0.1% distortion) but, increasing the volume, it is easy to exceed 0.3% to 20khz. It is true that a standard human ear does not perceive the distortion of over 12khz, but a young musician could understand that something is wrong.
Ah, here is the answer, same as I plan to use nichicon fw 1000uf on supply. Infront caps use nichicon KA and signal use 10uf silmic rfs and try use my old stock Lt1364 opamp. Would be great for next replacing filter section, thanks for sharing
How to increase the power itself ? Because I tested my Aiyima A07 using watt meter and it only draws most of the time at normal listening volume, 8 watt from wall socket, using 48v 7.3A Meanwell LRS350 Power Supply. My other bigger amp can draw 40 watt and the punch to my 400 watt each speaker set is powerful, while this Aiyima A07 cant provide the same punch to the same speaker. I know the real measurement is much more complex than that, but it works, bigger power draw from wall socket will provide stronger bass punch. Usually , ppl change the capacitor, I notice my bigger amp has 4x 2200uF capacitor, while this Aiyima a07 only has 2x1000uF, is changing the Electrolyte Capacitor (ElCo) going to provide more punch to the bass ? Because I read elco is like the power silo that provide the juice to deliver more bass, so bigger is ofc better. If I change it to like 2200 or 4700 uF, will it improve bass ? What else needs to be changed ?
Thanks for the vid! How much cost was involved with those additional upgraded parts? I own 2 of the A07's and think they sound REALLY good as is. Did the upgrades take this into the stratosphere sonically or just a marginal improvement?
I bought from taobao, this link item.taobao.com/item.htm?spm=a1z0d.6639537/tb.1997196601.270.606d748486qF1d&id=595735056878 throught import service, im not sure you could buy it from China mainland at mouser has coilcraft brand but higher price www.mouser.com/ProductDetail/Coilcraft/VER2923-103KL?qs=zCSbvcPd3pYFGNEVSZE3iw%3D%3D
@@trungqn1890 hi thank you so much for the very kind and valuable advice Instead of removing completely it i was thinking to try to slow it down reducing its voltage supply with one of those very tiny and cheap regulators available on ebay From what I understand noise is due to the high rotational speed of the fan? maybe even just a right resistor in series can work? imhe Meanwell are very good products indeed
I use MeanWell LRS 350 power supply, it comes with auto fan that will turn on if it gets hot, but this amp only draws like 8 watt from the 350 watt power supply I checked it using watt meter. 8 watt is just a tickle to 350 watt power supply, I can turn on the power for the whole day and its not even warm.
@@Mickimoss hi thank you very much for your kind and very valuable advice I didn't think to measure the current Very smart testing I will do the same I have seen Mean well SMPS inside professional equipment They must be excellent Thanks a lot again Kind regards Gino
@@rodplanet5901 from my mind. 9 nichicon 10uf 50v dont make much different in SQ, but noise is lower. 4 wima mks and inductors make better quality. Sound more detail and more wider soundtage. But the bass is slightly lighter
@@trungqn1890 wow! Your upgrade makes a lot of sense considering that aiyima without an upgrade sounds very good already. I have one and I might do some upgrade soon. Your video helps a lot. Thank you.
@@radzia1010 when i purchased it from internet, the official store in my country does not sell inclued power supply for this amp, so i must find another
@@VinhNguyen-re8km 2 con opamp này có nhiệm vụ convert từ tín hiệu đơn sang tín hiệu vi sai để amp chạy btl, nên khi dùng những con như muse ko phát huy đc nhiều về chất âm. Tất nhiên nó cũng có chút khác biệt, ấm hơn chút nhưng cũng giảm độ trong so với 1612
@@hunghung-ug2bb của mình nguyên bản chỉ là 1000uf 50v thôi. Của bạn chắc mới đc nâng lên rồi. Mình vẫn đang dùng 1000uf 63v dòng fw đây. Tụ lọc nguồn thì cơ bản ít ảnh hưởng chất âm
Job is nicely done but do not think it's worth it. I got a Fosi Audio TB10D / BT30D PRO and already think it's sound better then the A07, out of the box.
i finished these modifies quite a while ago, at that time fosi didn't introduce tb10d. Now I am satisfied with my a07 and don't think I will buy another product soon
Что бы стало заметно лучше в первую очередь надо избавится от ne5532 далее хороший блок питания и лишь потом замена конденсаторов. Первый и 2 пункты не услышит только глухой.
is there good sound improvement after you upgraded the output inductor?
Following this on ASR... Great work. Having trouble sourcing the parts.
coilcraft is very nice. as i remember texas instruments are using them in their demo board.
würth also has a high quality inductor at the same level of quality.
pimping the output filter with lower inner resistance should give you better dynamic control and less distortion at higher output power. very good choice.
regarding changing caps, i always look at the panasonic low esr types ike fc or fm series.
Class D has the problem that the distortion above 6khz increases too much if the volume increases.
With the AB class it is possible to easily obtain a distortion of less than 0.1% up to 70% of the maximum power.
With class D, distortion above 10khz increases terribly over 25% of the maximum power.
Using a more powerful power supply, the phenomenon is reduced but does not disappear.
Fortunately, it is rare to exceed 10 watts to listen to home.
TPA3255 has a particular feedback system that reduces some defects in class D, so you can expect 10 watts clean at 20khz (0.1% distortion) but, increasing the volume, it is easy to exceed 0.3% to 20khz.
It is true that a standard human ear does not perceive the distortion of over 12khz, but a young musician could understand that something is wrong.
Ah, here is the answer, same as I plan to use nichicon fw 1000uf on supply. Infront caps use nichicon KA and signal use 10uf silmic rfs and try use my old stock Lt1364 opamp. Would be great for next replacing filter section, thanks for sharing
Thanks your suggets
Chemi-con caps are (arguably) better than Nichicon for power supply caps.
Annndd after all this, fosi audio release a better amplifier for less money... Oops
Haha
Very useful video, thanks
How to increase the power itself ? Because I tested my Aiyima A07 using watt meter and it only draws most of the time at normal listening volume, 8 watt from wall socket, using 48v 7.3A Meanwell LRS350 Power Supply. My other bigger amp can draw 40 watt and the punch to my 400 watt each speaker set is powerful, while this Aiyima A07 cant provide the same punch to the same speaker. I know the real measurement is much more complex than that, but it works, bigger power draw from wall socket will provide stronger bass punch.
Usually , ppl change the capacitor, I notice my bigger amp has 4x 2200uF capacitor, while this Aiyima a07 only has 2x1000uF, is changing the Electrolyte Capacitor (ElCo) going to provide more punch to the bass ? Because I read elco is like the power silo that provide the juice to deliver more bass, so bigger is ofc better. If I change it to like 2200 or 4700 uF, will it improve bass ? What else needs to be changed ?
Thanks for the vid! How much cost was involved with those additional upgraded parts? I own 2 of the A07's and think they sound REALLY good as is. Did the upgrades take this into the stratosphere sonically or just a marginal improvement?
I swapped op-amp with Burr-Brown OPA2604 op amp.. sound quality is way better than the already good one. A must try, you can always swap it back
Please send part list.
Cool
Hi, nichicon FW 1000uf 63v x2 2.3$
nichicon FW 10uf 50v x9 2$
wima mks4 1uf 100v x4 3$
coilcraft OEM inductor 10uH x4 16$
Did it help?
Puedes describir los reemplazos que realizaste? Gracias
Hi, nichicon FW 1000uf 63v x2 2.3$
nichicon FW 10uf 50v x9 2$
wima mks4 1uf 100v x4 3$
coilcraft OEM inductor 10uH x4 16$
@@trungqn1890 I bought A07 this time, but mine has 2 units of 1500uf 50v. By the way, is there no problem if I replace it with 1000uf 63v?
@@blueguerrilla1027 No problem at all. but what voltage do you use? If it's less than 40v, it doesn't need to be replaced.
@@trungqn1890 Thank you for your answer. I'm using it for 24V. Once again, thank you.^^
Hi. At 0:08, why you rewired the Aux and RCA? Thanks
Do you mean 0:08 ?
@@trungqn1890 Yes, my bad, 0:08. Thanks
@@Hudsonlee1954 factory has changed it because 2 channel of aux was revered at previous versions of this amp, then they fix it
@@trungqn1890 Thanks for sharing 👍
can you please share the link where to buy the inductors? thanks
I bought from taobao, this link item.taobao.com/item.htm?spm=a1z0d.6639537/tb.1997196601.270.606d748486qF1d&id=595735056878
throught import service, im not sure you could buy it from China mainland
at mouser has coilcraft brand but higher price
www.mouser.com/ProductDetail/Coilcraft/VER2923-103KL?qs=zCSbvcPd3pYFGNEVSZE3iw%3D%3D
Hi very nice mod indeed You say that you removed the smps fan Did you check any temperature? Thanks Gino
Yes, it operated normaly about 36-38*C. Because it self using a lm7812 to regulated down to 12v for the fan, this lm7812 very hot, i also removed it
@@trungqn1890 hi thank you so much for the very kind and valuable advice
Instead of removing completely it i was thinking to try to slow it down reducing its voltage supply with one of those very tiny and cheap regulators available on ebay
From what I understand noise is due to the high rotational speed of the fan?
maybe even just a right resistor in series can work?
imhe Meanwell are very good products indeed
I use MeanWell LRS 350 power supply, it comes with auto fan that will turn on if it gets hot, but this amp only draws like 8 watt from the 350 watt power supply I checked it using watt meter. 8 watt is just a tickle to 350 watt power supply, I can turn on the power for the whole day and its not even warm.
@@Mickimoss hi thank you very much for your kind and very valuable advice
I didn't think to measure the current Very smart testing
I will do the same
I have seen Mean well SMPS inside professional equipment
They must be excellent
Thanks a lot again
Kind regards Gino
What about a better heat sink are any available?
I'm also searching, but none of them have fit box. The box fit with 30x20x90mm heatsink. i found some 40x20x100mm, must milling them down
so how dose it sound?
Very nice
Hello. You almost upgraded everything. How much did it cost?
Hi, nichicon FW 1000uf 63v x2 2.3$
nichicon FW 10uf 50v x9 2$
wima mks4 1uf 100v x4 3$
coilcraft OEM inductor 10uH x4 16$
@@trungqn1890 thank you for your detailed and prompt reply. How would you rate the sound quality after the upgrade?
@@rodplanet5901 from my mind. 9 nichicon 10uf 50v dont make much different in SQ, but noise is lower. 4 wima mks and inductors make better quality. Sound more detail and more wider soundtage. But the bass is slightly lighter
@@trungqn1890 wow! Your upgrade makes a lot of sense considering that aiyima without an upgrade sounds very good already. I have one and I might do some upgrade soon. Your video helps a lot.
Thank you.
@trungqn1890
What type of power supply You use? 19$ is cheaper than aiyima!
I using meanwell hrp-450-36. It is used item
@@trungqn1890 thanks but new cost almost 200$!. What is wrong with Aiyima genuine power supply?
@@radzia1010 when i purchased it from internet, the official store in my country does not sell inclued power supply for this amp, so i must find another
@@trungqn1890 I got the HRP-450-48, it's good stuff!
Now i need to check the rest of your mods, great stuff man!
Did the new parts cost more than the original amp?
power supply 19$
4 inductors 15$
4 wima caps 5$
all nichicon 5$ :D
@@trungqn1890 can you please share the link where to buy the inductors?
Con này để nút nguồn on mà tắt điện có bị bụp loa ko bác?
bụp rất nhỏ thôi bác
Cho mình hỏi thêm cái volume sử dụng cho đường jnput nào vậy
@@VinhNguyen-re8km 2 đường input đều chung vào 1 cả, bác cắm đường nào thì nó đều qua volume đó cả
@@trungqn1890 thanks bác, qua chiết áp làm giảm chất lượng âm nếu chjết áp k tốt
@@VinhNguyen-re8km nó chủ yếu ko đều 2 kênh thôi bác. Còn chất lượng âm qua điện trở ko ảnh hưởng nhiều
Con này mới mua về chất âm sao ạ...
Cũng khá ok đó bác. Thêm tụ cảm thì thêm chi tiết và thoát tiếng hơn chút
@@trungqn1890 chi phí bác mod hết bn thế
@@x-pis3004 đắt nhất 4 cục cảm 360k. Còn lại tụ thì hơn trăm thôi
2con tụ tớ kéo dây ra ngoài là gì bác
Làm màu thêm thôi b. Ko có tác dụng đáng kể gì
Sao bác ko nâng cấp 2 con opamp nhỉ?
Trong ảnh có 2 con muses02 đấy bác. Giờ thì e dùng 1612 rồi
@@trungqn1890 so sánh chất âm giữa 02 con này thế nào bác
@@VinhNguyen-re8km 2 con opamp này có nhiệm vụ convert từ tín hiệu đơn sang tín hiệu vi sai để amp chạy btl, nên khi dùng những con như muse ko phát huy đc nhiều về chất âm. Tất nhiên nó cũng có chút khác biệt, ấm hơn chút nhưng cũng giảm độ trong so với 1612
Full nguyên bộ giá sao bạn. Có bán ko
Cả nguồn cỡ 2tr đó b
@@trungqn1890 công suất bao nhiêu vậy bạn
@@phuocnguyen8774 chạy 38v thì tầm 150w 4ohm 1 kênh b
mấy cái linh kiện thay mới bạn mua ở đâu vậy. cái cuộn cảm thông số là bao nhiêu vậy bạn.
Tụ thì trên shopee có bán. Cuộn cảm mình mua taobao, 10uh bác ạ
@@trungqn1890 ban ơi. Mình mới tháo mạch ra. 2 con tụ to chỗ cuộn cảm là 1200uF mà. Bạn thay con 1000uf có sao ko ? Chất âm như thế nào ạ.
@@hunghung-ug2bb của mình nguyên bản chỉ là 1000uf 50v thôi. Của bạn chắc mới đc nâng lên rồi. Mình vẫn đang dùng 1000uf 63v dòng fw đây. Tụ lọc nguồn thì cơ bản ít ảnh hưởng chất âm
@@trungqn1890 uh. M đang nghe thấy cũng khá hay. Bass cũng mạnh. Treb thì hơi yếu. Tụ 1200 Mình tìm mua mà thấy ít quá. Chủ yếu 1000uf.
@@hunghung-ug2bb b thay 4 con tụ xuất wima sẽ thấy âm hay hơn
Job is nicely done but do not think it's worth it.
I got a Fosi Audio TB10D / BT30D PRO and already think it's sound better then the A07, out of the box.
i finished these modifies quite a while ago, at that time fosi didn't introduce tb10d. Now I am satisfied with my a07 and don't think I will buy another product soon
Т.е. чтобы стало лучше звучать, нужно просто заменить дешёвые компоненты на дороги... Карл
Что бы стало заметно лучше в первую очередь надо избавится от ne5532 далее хороший блок питания и лишь потом замена конденсаторов. Первый и 2 пункты не услышит только глухой.