Minimalist TPA3250 Amplifier with quality components..

Dxvideo No worry for :

"https://www.izmirnumunepcb.com/prototip-pcb-fiyat-hesaplama-siparis-formu
Sorry its only in Turkish.. "

Atalarım Cappadocia ve Smyrna'da doğmuş olsa da, Türkçe konuşmuyorum ...

(Even though my ancestors were born in Cappadocia & Smyrna, I do not speak Turkish ...)

that Google Translate is for 😏
Money & Music also makes🤔 people tolerant of each other (birbirine toleranslı),
possibly also the wisdom that may be acquired as a result of age.

Elias
 
Last edited:
  • Like
Reactions: Dxvideo
I finally had a chance to assemble my amp and try it out.
I can briefly say that it has a great sound.
Although I ran it at 450Khz and did not apply PFFB, the noise is quite reasonable. The trebles, mids and bass are full and detailed. Distortion is reasonable but it has a very musical characteristic.
It is also quite stingy 🙂
At nominal listening level with my 86dB speakers and 24v supply, I observed a current draw of only 150-160mA. It's an impressive performance indeed.
I highly recommend it.
 

Attachments

  • 20230308_151502.jpg
    20230308_151502.jpg
    380.9 KB · Views: 172
  • 20230308_151509.jpg
    20230308_151509.jpg
    372.3 KB · Views: 168
Since I don't like mess, I put the amp in a cheap aluminum box and took the connections out with cheap connectors (shame on me 🙁 ).
Power, clip and error leds are moved to the front panel. Also an ALPS RK27 10K pot is on the front panel with an alu knob (which is the most expensive part of this system)..
I fed my amp with a meanwell lrs-200/24 power supply set to 28v. I added a 2x3.3mH common mode choke and 1800uF low ESR capacitor to the output of the power supply, and I drilled ventilation holes in a cheap plastic box with a laser cutter and placed the power supply inside.
Obviously, the commom mode choke and low ESR capacitor I added to the output of the power supply had no effect on the noise. Therefore, I do not recommend it.
This is a really impressive result for such a cheap system.
 

Attachments

  • 20230331_135639.jpg
    20230331_135639.jpg
    201.7 KB · Views: 94
  • 20230331_135653.jpg
    20230331_135653.jpg
    312.3 KB · Views: 97
  • 20230331_135703.jpg
    20230331_135703.jpg
    334 KB · Views: 101
Last edited: