Class D Amp Photo Gallery

[orchardaudio]

Customer build.

 

[JCRAcoustics]

Hi All,

Sharing an SMD amp I put together using a TPA3116D2. Schematics and everything available here: https://www.jcracoustics.co.uk/plans/
YouTube tutorial available on the design build as well here:

This one has Bluetooth and Li-Ion Charging built in. Just posted a new thread on it for those wanting more detail!
Let me know your thoughts!

 

[eexxcc]

Hi,

3E Audio TPA3255
OPA1656 OpAmps
SMPS 48v

 

[emedia4u]

https://www.ebay.com/itm/255511886392

 

[avelasco]

Hi all
This is my project, it is not finished, Is a tri-amp system using TPA3255 with active crossover
I already test the crossover and they worked, the next phase is to finish the amp board
The system consist of
2 TPA3255 3E audio Boards for sub 100hz
1 custom TPA3255 amp above 100hz
Custom power boards

this is my first design so I made some mistakes but I have learned a lot

 

[PSA78]

My new steel case that I fabricated and painted for the:
3E 2x DSP
3E 3251 (4ch)
3E 3255 (2ch)
Connex Electronic PSU (300W + 600W)
SpeakON connectors, and 2 extra XLR if I want to add subwoofers.
Jenvig wires.

 

[eexxcc]

Hi,

Dual mono class D amp with amplifier modules by @Sous
The sound is impressive!!

 

[Poultrygeist]

TPA 3110 with 6N3 preamp and modded PS.

 

[Poultrygeist]

TPA3116

 

[Poultrygeist]

Volt + ( TPA 3118 )

 

[rrobot]

Hi,

Dual mono class D amp with amplifier modules by @Sous
The sound is impressive!!

The build is impressive too! What are those internal mesh covered interconnects ? They look really neat and tidy. Great stuff! 👌

 

[eexxcc]

Cables wrapped with these: https://a.aliexpress.com/_uR4f0G

 

[von Ah]

Goodies for the next Class-D build. Exciting things. 😎

 

[Coil2021]

What's this board application?

 

[von Ah]

A month later and I have a working amplifier!

This proof of concept includes:

• IcePower 300A2
• MicroAudio SMPS630-G
  • +-50 VDC
  • +-15 VDC Aux
  • +-12 VDC Vdrive
• Additional capacitors (2*10000uF per rail) between SMPS and amplifier, also from MicroAudio
• 300A2 wiring harness set from Ghent Audio
• Cheap UPC1237 speaker protection board from Amazon

No one else is in the house for now, so I can temporarily justify the precarious setup to test out the amp. Preamp is an ACP+ and the source is a Squeezebox. Speakers are Manzanitas.

It sounds MARVELOUS. Absolutely silent background, even with this mess of cabling. Zero noticeable power-on or -off transients. The very little heatsink on the 300A2 is warm, probably around 45C. There is plenty of detail and power available. I love it, and since it’s the latest amp I’ve built, it’s my current favorite. 🤓

My chassis plan is still in flux.

Thanks to Sami from MicroAudio and mdsimon2 for the support to get me to this working prototype. 👍

 

[Vunce]

Nice going von Ah!
Its amazing how much Punch is packed in that little module. Total opposite philosophy compared to what the plank amp sits on top of....

 

[von Ah]

Thanks, Vunce. It IS amazing. Tiny little thing with BIG, lush sound.

It is really difficult to disconnect the VFET from the system, but I like cycling through my little collection of toys. Putting this one in a chassis will need to happen soon. It’s worthy.

 

[von Ah]

I’ve named it The Sleeper.

Classic Hitachi lateral TO3s on the back for bling.

Meters aren’t moving, yet, but I couldn’t resist an audition.

Sounds great. A little mains hum that I will track down later, but it’s not noticeable more than a foot away.

Big Summer Amp is live.

 

[rbryantaz]

Here is a tpa3250 board I put together for my bass shaker project.

It uses a modified 36v 5amp smps that was $14 on Amazon that is adjusted down to 32v.

It is a dual mono with a single input and two active preamps with volume and frequency adjustment. For this project the preamps are just single supply and I powered them with a step down buck converter off from the main supply.

I was going to use this board for another project but just decided to build this for the bass shakers. They are 4 ohm and 50w so this should be more than enough. A 3116 would have probably been just fine but they are 4 ohm so I would really want dual 3116 chips anyway and I already had this one...

The IEC is a little bit tighter to the smps capacitor than I would like but it really isn't bad.

I left just a little room to add some power supply cap between the smps and the amp but I haven't done it yet.

I am working on another subwoofer based on a tda8954 but I am still not quite happy with it. That bigger amp uses a dual supply preamp and a dual 36v smps.

And finally I need to finish my 5.1 surround sound project. It has a IR controlled preamp, a dolby decoder, 3 mono tpa3116 and 1 stereo tpa3116 boards.

 

[fireanimal]

I Just completed a 6 channel Starkrimson, with boards spanning 3 different revisions. Originally 4 of these were powering my main speakers, but I need more power for those, so they have been re purposed into this 6 channel build. It is powering my side surrounds and atmos speakers. All measurements were taken with a QA-403, and every amp hits specifications no problems! Channel 6 idle noise is a bit higher then the rest, and some mains leakage due to the proximity of the IEC connector, but nothing audible.

The difference from running the 6 speakers from my Yamaha RX-A6A to this amp is night and day, and I honestly was not expecting such a drastic change.

3 channels each are powered off of a Microaudio SMPS630-SO power supply, which I have used before in my Class AB Wolverine amplifier builds, and are fantastic low noise high power supplies!

Thanks to @stuartmp for The ground lift and T-ground PCB's

Thanks also to @Cresnet and @orchardaudio for making such great products available to us!