Class D Amp Photo Gallery

My Douk SMPS is mounted on the heat sink with 5mm standoffs but has some sort thin of insulation between the two. It is very close and only has about 1mm clearance in places.I know Pigmy has a different SMPS but he should go for 10mm and then check the clearance.

Get yourself some fish paper. It's good to keep on hand when you need to insulate one surface from another.
 
Better safe then sorry, I wouldn’t feel save with 5mm without any isolation. Cheap PCB’s can bent easily because of the weight of the components after a while.

I'm using a Connex 600W smps:

SMPS600RS | Connex Electronic

It states "use a 5mm standoff", I'm using 8mm.
But I'm still wondering if I should add any form of insulation, and if so - what kind..?
 
Hi amigos,
My last Class D Amplifier, 2x300W based on Discret components design. Double Mono
with 800W SMPS LLC PSU 2x60V
Nichicon / Epcos caps

Amp-4.jpg

Amp-5.jpg

Amp-2.jpg

Amp-1.jpg

Amp-3.jpg
 
Very nice work indeed :up:
danibourn, the amp modules are your own design right?
Fully discrete or based on driver IC?
Post or pre-filter feedback?

I bought those board fully assembled on a friend's recommendation.
They sound very fine. The treble is very sweet and particulary accurate and overall they are very powerfull.
They seem rather well constructed check out :

B1.jpg

B2.jpg

B3.jpg
 
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Seems to have some SO chips on the other side of the black pcb. Diodes for regulating to +-5V ... probably/could be, a IRS2092S design. Coil seem to be even smaller than T106-2 .... small for 300W I think .....

Yes Indeed, based on IRS2092S sorry I forgot ton mention.
PCB is 100x75x62mm

I finally changed the internal design as recommended to avoid interferences.

Amp-6.jpg

B4.jpg


The LLC 800W PSU, is desgined in the same way :

P3.jpg
 
Hi amigos,
Can someone can help me ? When I power ON my amplifier I have a "Pop" at startup despite the fact that my boards have a relay on it. When I power OFF the amplifier, I noticed that the relay emits a "tac sound" as if the effect of the relay were reversed.


how i can erase this pop at startup ?
 
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Simplest way would be to add a loudspeaker protection module between the amplifier outputs and your speakers binding posts. These modules are normally equipped without a turn on delay and immediate cut-off at power down.

My 3e doesn’t have pop and power on and off, they’ve probably implemented a circuit.

BR
Eric
 
Simplest way would be to add a loudspeaker protection module between the amplifier outputs and your speakers binding posts. These modules are normally equipped without a turn on delay and immediate cut-off at power down.

My 3e doesn’t have pop and power on and off, they’ve probably implemented a circuit.

BR
Eric

Weird... I was almost on the would have had a turn ON delay at startup. what makes me think that: it is that they Turn OFF more slowly than they Power on.
But something sure : they sound awesome with a good Audio source.

Thanks anyway.
 
Busy wiring it all up..
Due to changing design / parts *after* ordering my cases, things got a bit cramped... :)

I'm trying to make it fit and then see whether it has any effect on performance, if putting things so close together degrades performance I'll have to get bigger cases.

Any insightful tips / advice based on this photo is always welcome :-D

SbWjZ61.jpg
 
Amp MkII

3eAUDIO TPA3255
Douk 400w 48vdc
Khadas Tone Board DAC
Audiophonics Case with custom zebrano front
USB C Extension Lead
 

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