Infineon MA12070 Class D

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#441
I tested with all (open-load, 8R and 4R) in BTL mode.
I used ceramic capacitors in the first design step - it worked well technically, but the ceramics make a serious amount of noise. Therefore I changed to WIMA caps (FKP2C016801D00HSSD and FKP2C002201D00KI00).

The 75 ohm resistors should have at least 0.5W.
 
#444
notakosan said:
Anybody has experience with this BRZHIFI Infineon amp? How does it sound?

2*80W Bluetooth 5.0 QCC3003 Infineon MA12070 Digital Audio Power Amp For Speakers 20W~200W HiFi Stereo Amplifier Class D Aux 3.5|Amplifier| - AliExpress
Click to expand...

I have already purchased and are using this amp.
I think it is the smallest amplifier on the market.
In terms of sound quality, it is an excellent product like the SMSL A300 and AIYIMA A07 A04.
However, there are some points that cannot be complimented.
1. The power ON / OFF operation is an operation with the volume knob.
2. Pop noise when the power is turned on / off does not come out if you operate it quickly, but if you turn the volume knob slowly when it is off, a big pop noise comes out.
3. The noise level when there is no sound is a little higher than that of Aiyima A07 A04. I think this is because the quality of the OP amp I'm using is poor.
 
#445
Toku said:
I have already purchased and are using this amp.
I think it is the smallest amplifier on the market.
In terms of sound quality, it is an excellent product like the SMSL A300 and AIYIMA A07 A04.
However, there are some points that cannot be complimented.
1. The power ON / OFF operation is an operation with the volume knob.
2. Pop noise when the power is turned on / off does not come out if you operate it quickly, but if you turn the volume knob slowly when it is off, a big pop noise comes out.
3. The noise level when there is no sound is a little higher than that of Aiyima A07 A04. I think this is because the quality of the OP amp I'm using is poor.
Click to expand...

Very helpful review. Thank you.
 
#446
Hello,

I am currently more in the CSR/QCC Bluetooth board vortex, but I found something which may be interesting for you:

There is a new ma12070p amplifier from Arylic: Up2stream Plate Amp
Shop: Wireless Plate Amp Up2stream Plate Amp-Arylic.com– arylic
Data Sheet: https://cdn.shopify.com/s/files/1/0072/6899/1049/files/Up2Stream_Plate_AMP_English.pdf?v=1622181562

attachment.php


Price
Amplifier 170 $
DSP software 20 $ "ACP Workbench"

Power
2x 40 W @ 4 Ohm /(2x 20 W @ 8 Ohm)
100-240 V AC buck converter integrated

Inputs
Aux
Bluetooth 5.0 AAC
WiFi/Ethernet: AirPlay, DLNA, UPnP, Spotify connect, Amazon Music, Qplay, Deezer, Napster, TuneIn
USB
SPDIF (available at the PCB)

Features:
Integrated DSP solution
Subwoofer output (which is likely programmable via the ACP Workbench)

Have fun!
 

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#448
DoItYourselfer said:
Hello,

I am currently more in the CSR/QCC Bluetooth board vortex, but I found something which may be interesting for you:

There is a new ma12070p amplifier from Arylic: Up2stream Plate Amp
Shop: Wireless Plate Amp Up2stream Plate Amp-Arylic.com– arylic
Data Sheet: https://cdn.shopify.com/s/files/1/0072/6899/1049/files/Up2Stream_Plate_AMP_English.pdf?v=1622181562



Price
Amplifier 170 $
DSP software 20 $ "ACP Workbench"

Power
2x 40 W @ 4 Ohm /(2x 20 W @ 8 Ohm)
100-240 V AC buck converter integrated

Inputs
Aux
Bluetooth 5.0 AAC
WiFi/Ethernet: AirPlay, DLNA, UPnP, Spotify connect, Amazon Music, Qplay, Deezer, Napster, TuneIn
USB
SPDIF (available at the PCB)

Features:
Integrated DSP solution
Subwoofer output (which is likely programmable via the ACP Workbench)

Have fun!
Click to expand...

For the price, they could've used two chips for better output... and the stated 0,9% THD+N is rather high, i suspect it's their linkplay module being the weak link here
 
#451
#452
#454
It is basically a 4 channel output DSP powered Bluetooth Amplifier (but also analog-input available).

The DSP supports all important functionalities like HP/LP/EQ, Gains, Sourceselect, Limiter, Delay but also some advanced processing features like Dynamic Bass Boost or artificial bass enhancement.
Everything configurable via Wi-Fi directly into the device via a UI software.

Control is possible via external IO's or via IR-remote control.
 
#455
maggusxy said:
It is basically a 4 channel output DSP powered Bluetooth Amplifier (but also analog-input available).

The DSP supports all important functionalities like HP/LP/EQ, Gains, Sourceselect, Limiter, Delay but also some advanced processing features like Dynamic Bass Boost or artificial bass enhancement.
Everything configurable via Wi-Fi directly into the device via a UI software.

Control is possible via external IO's or via IR-remote control.
Click to expand...

Very Nice! A few questions.....

Did you use the ESP32-WROOM chip? I ask because I've tried unsuccessfully
to drive the MA12070P with the ESP32-WROVER.

What ESP32 firmware are you using that would have a MA12070P driver?

I assume in streaming mode you are connecting the ESP32 to the MA12070P
via I2S, but how you are feeding the amp analog signals?

Again, well done.

Mike
 
#456
maggusxy said:
Hey guys!

See one of my latest projects with the MA12070P on my YouTube channel:
[#26.1] 4-Channel DSP Bluetooth Amplifier - Intro - YouTube
[#26.2] 4-Channel DSP Bluetooth Amplifier - Live Demo - YouTube
Click to expand...

mboxler said:
Very Nice! A few questions.....

Did you use the ESP32-WROOM chip? I ask because I've tried unsuccessfully
to drive the MA12070P with the ESP32-WROVER.

What ESP32 firmware are you using that would have a MA12070P driver?

I assume in streaming mode you are connecting the ESP32 to the MA12070P
via I2S, but how you are feeding the amp analog signals?

Again, well done.

Mike
Click to expand...

Yes it's the standard WROOM32D.
I developed all with the ESP-IDF toolchain. For connecting to the MA12070P i made a custom driver.

For the analog-input there is a dedicated ADC chip (PCM1808) on the board which is running the audio through the DSP in the ESP32.
 
#457
jealcuna said:
ok, this is my history. I buy two ma12070 from lusya store in aliexpress. They send me the wrond model, so I receive the ma12070p. For documentation reason I share with you guys picture of my board. I remove the capacitors from the input and make just jumpers. The following resistors are placed R7, R4, R5, R6. These ones are not soldered R3, R2, R1. Also I solder SD1 pin with SCK.
Click to expand...

Can someone point me to a schematic that shows the R7, R4, R5 and R6 resistors? I've looked at several reference schematics at the Infineon website, but none of them show those particular resistors. Would like to know their values and their function in the design. TIA.
 
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