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hifimediy 17th August 2010 11:33 AM

Another project, all digital DDX amplifier
 
Hi, everyone.
This is a new 2.1 channel amplifier project. It's a power DAC, directly input digital signal, no analog signal process before output to speaker.
In my plan, a mcu and HID like LCM, remote receiver and rotary encoder and so on will be added.
May be some of you have finished similar or anyone have better idea? Any suggestion will be valuable for me.
The design:
http://www.diyaudio.com/forums/attac....1-channel.png
Test by wiring.
http://www.diyaudio.com/forums/attac...rd-ddx-amp.jpg
based on my AMT2050 v2 board.

teamacc 17th August 2010 12:18 PM

So basically the DAC replaces the TC2000 in the tk2050 board?
Could it be used with the new T3 boards too then?

Any chance you could include some analog input too, as most people that build such a amp would want to keep their ipods connected.

hifimediy 17th August 2010 01:09 PM

I call it AMu320, and the coming version will be 1.0.
It's a digital(S/PDIF) input and PWM output IC replace TC2000, and a mcu is added to handle the system, so it will be more interesting to use. I think T3 is a analog input class-T amplifier which is different.
We can add a ADC module to AMu320 to receive analog input.

jtjy 17th August 2010 01:40 PM

Quote:

Originally Posted by hifimediy (Post 2275355)
I call it AMu320, and the coming version will be 1.0.
It's a digital(S/PDIF) input and PWM output IC replace TC2000, and a mcu is added to handle the system, so it will be more interesting to use. I think T3 is a analog input class-T amplifier which is different.
We can add a ADC module to AMu320 to receive analog input.


dear sir, any idea when you are selling this board? sounds interesting to me:D

teamacc 17th August 2010 01:44 PM

So the chips used in the AMU320 are tp2050 chips?
If so, can the tc2000 of the t3 boards be cut out and replaced by the amu320 pwm converter?
That way, T3 will have digital input too.

udailey 17th August 2010 01:55 PM

A suggestion would be to offer in modules. Maybe I require 5.1 system or 5.3. Rotary volume would be a master and each module a slave. Subwoofer module would have adjustable gain, perhaps each has adjustable gain. Subwoofer module should be able to be hacked into to provide digital or active crossover.
Uriah

Solve 17th August 2010 02:31 PM

Great idea with 2.1!
Not many offers that possibility, modules as udaley say is even better!

udailey 17th August 2010 02:31 PM

Just read the STA320 intro on the datasheet. Nice choice as it already has capability for adjusting gain and frequency.

hifimediy 17th August 2010 03:17 PM

Quote:

Originally Posted by jtjy (Post 2275388)
dear sir, any idea when you are selling this board? sounds interesting to me:D

I will make the first sample this week, but need more time to finish the software.:D

Quote:

Originally Posted by teamacc (Post 2275392)
So the chips used in the AMU320 are tp2050 chips?
If so, can the tc2000 of the t3 boards be cut out and replaced by the amu320 pwm converter?
That way, T3 will have digital input too.

Right, remove the TC2000 and connect the signal from AMu320, you can do that.

Quote:

Originally Posted by udailey (Post 2275407)
A suggestion would be to offer in modules. Maybe I require 5.1 system or 5.3. Rotary volume would be a master and each module a slave. Subwoofer module would have adjustable gain, perhaps each has adjustable gain. Subwoofer module should be able to be hacked into to provide digital or active crossover.
Uriah

I think 5.1 will be a next project, a added decoder(support DTS, AC-3 etc.) is needed for 5.1 system, so will be more complicated than 2.1. :rolleyes:

Cyan 17th August 2010 04:12 PM

So is the subwoofer out amlified, or just signal? If signal, does it have a crossover? And what crossover order?


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