3e Audio TPA3255 Amplifier Kit 480-1-29A Review

[amix]

I think I mixed it up in my head.

 

[Tell]

I think I mixed it up in my head.

Shit happens

 

[3eaudio]

Hi Amigos
want to share some info on Rev B released recently:

1. Input Opamp Change to OPA1556,this is due to part unified that we found it perform the same as OPA1612 in another project.
2. add a optional 12V connector (not populated) for some people that need for power LEDs,etc.
3. Buck cap change to 1500uF/80V/Nichicon due to 1800uF/63V/Rubycon not able to purchase.

share a test between OPA1612 and OPA1656

 

[daniboun]

Hi Amigos
want to share some info on Rev B released recently:

1. Input Opamp Change to OPA1556,this is due to part unified that we found it perform the same as OPA1612 in another project.
2. add a optional 12V connector (not populated) for some people that need for power LEDs,etc.
3. Buck cap change to 1500uF/80V/Nichicon due to 1800uF/63V/Rubycon not able to purchase.

View attachment 362979
share a test between OPA1612 and OPA1656

Thanks for sharing. In my next project it is a question of measuring this V2 module via APx555.
On the other hand, I got the Rev B but with 1800uF/63V/Rubycon caps, same as Rev A.....

 

[olieb]

1. Input Opamp Change to OPA1556,this is due to part unified that we found it perform the same as OPA1612 in another project.
2. add a optional 12V connector (not populated) for some people that need for power LEDs,etc.
3. Buck cap change to 1500uF/80V/Nichicon due to 1800uF/63V/Rubycon not able to purchase.

So it is more of a side grade?
What is the rationale behind the change of the inductors? 2321 versus 2251, you left that out?

 

[3eaudio]

So it is more of a side grade?
What is the rationale behind the change of the inductors? 2321 versus 2251, you left that out?

it is from manufacture data code,inductor keep no change

 

[amper42]

The cost of the TI OPA1656 is less than half of the OPA1612 cost. Yet, it does a great job too.

 

[activewire]

1. Input Opamp Change to OPA1556

Think you meant OPA1656?

Am I correct to believe that when I modify the RevB modules (now awaiting my order of 6 modules) for single end input, I must use the exact same op amp as the one already mounted (meaning OPA1656) or would it matter if these are not identical?

 

[3eaudio]

Think you meant OPA1656?

Am I correct to believe that when I modify the RevB modules (now awaiting my order of 6 modules) for single end input, I must use the exact same op amp as the one already mounted (meaning OPA1656) or would it matter if these are not identical?

yes,OPA1656.
you can use same or similar performance one, our purpose use OPA1656 is to maintain the same performance with OPA1612 in AMP board itself.

 

[dpuopolo]

Running my new mono cards on a ten foot #10 stranded cord from the 50 volt 10 amp power supply. Two feet from the cards the cord splits into two #16 cords which plug into the two mono amp cards. I'm running a WiiM Pro Plus into the amp and Emotiva B1+ speakers. The sound is wide and deep - far more so than with their stereo amp card.
A notable improvement in both left/right top/bottom and Forward/ backwards.