Ongoing project with FDA chips, I2S input and >40W?

JMF11

Member
2013-12-22 6:40 pm
Hello,

I have searched the net, and did not found any... Would you be aware of projects / products that would provide:
- Full digital amp: no DAC/ADC in the chain,
- I2S input,
- power at least 40W (more welcomed)

Something like the https://polyvection.com/shop/plainamp/ or Pi-DigiAMP+ - IQaudIO Limited

The used chip in the above designs goers through a DAC (Functional Block Diagram for TAS5756M), and I would prefer to avoid that.

Ability to configure the chips through I2C would be a plus...

I have a (in fact 2) FX-audio D802 with STA326, but see no way to tweak them to get a I2S input.

Best regards,

JMF
 

JMF11

Member
2013-12-22 6:40 pm
Hi,

yes, this an option. It however looks expensive at almost 100€ compared to alternative products like the above, or the many available analog input class D amps. Let's hope that this type of digital input will become mainstream in the short term, with larger choice.

JMF
 

gwing2

Member
2015-03-25 10:18 pm
Hello,

I have searched the net, and did not found any... Would you be aware of projects / products that would provide:
- Full digital amp: no DAC/ADC in the chain,
- I2S input,
- power at least 40W (more welcomed)

Something like the https://polyvection.com/shop/plainamp/ or Pi-DigiAMP+ - IQaudIO Limited

The used chip in the above designs goers through a DAC (Functional Block Diagram for TAS5756M), and I would prefer to avoid that.

Ability to configure the chips through I2C would be a plus...

I have a (in fact 2) FX-audio D802 with STA326, but see no way to tweak them to get a I2S input.

Best regards,

JMF

Globuleg kindly describes how to access the i2s on the v200 amp here Amplificateurs FDA - Page 38 - 30063064 - sur le forum Amplificateurs Intégrés - 1030 - du site Homecinema-fr.com
 

JMF11

Member
2013-12-22 6:40 pm
Hello,

Thank you for sharing. I have identified this thread, and the possibility to hack the V200 to feed I2S. If I understand well, it was very easy in the early vesions and more difficult now.

I find strange to have to tweak/hack so heavily those chips to do what we need, when maybe an open design, well engineered from its basis could maybe cost the same price or be cheaper. My background in electronics is low, but if nothing pops up, I'll look at what I can do.

In parallel, I'm waiting for news about the next version of https://polyvection.com/shop/plainamp/ .

Best regards,

JMF
 

JMF11

Member
2013-12-22 6:40 pm
Very interesting, as based on the STA350, FDA, and completely open with software package:
You can add to your list that extension board from ST Micro, based on the STA350: http://www.st.com/content/st_com/en/...o-cca01m1.html, provided software libs bring very near from that idea. Only limitation is the power (2x40W, a bit lower than the STA326). For DIYers, this board is really interesting as there is no blob around the chip, and you have all tools to configure and drive it.


JMF