Class D Amp Photo Gallery

[orchardaudio]

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!

Awesome, congrats.

 

[fireanimal]

Thanks

 

[Cresnet]

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!

Again, I am speechless about the build quality.

It's one of the best I have ever seen.

Thanks for sharing

 

[von Ah]

Agreed! Wonderful, flawless build!

 

[Cresnet]

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.

Nice Build.

I really like those Mosfets, they remind me of that Maplin 100W ampliifer!

 

[von Ah]

Thank you! That was a fun build and I’ve been using it in my main system lately. Currently it’s powering the low half of a DSP 2-way crossover system. An ACA Mini is powering the upper half.

I have a soft spot for those old Hitachi laterals. I know the Maplin iterations were pretty well regarded.

 

[enio nery]

TPA3116 blue board, got too excited and finished it without taking pictures of the mods ive done. i have replaced the output caps with mundorf MKP, the cheap 25v filter caps with Nichicon FG 35v 2200uf, the smd inductors with toroidal ones. im

 

[von Ah]

First test of these very new modules from @Erica.C is positive so far!
Silent background and playing through my test speakers very well.
I’m planning a 6-channel amp build with these for 3-way crossover work.

Edit: sounding REALLY good. I’m impressed.

 

[baggerbole]

A sound comparison between wolverine and Erica.C´s amp would be very interesting!
von Ah do you have a wolverine too?

 

[von Ah]

I do not have a Wolverine. The two Class AB amps I have are a DH-220C and TubSuMo. All three are quite different designs.

 

[baggerbole]

Mhmm
An older Pass design and a hybrid with good reviews.
Maybe you'll find time for a comparison someday with the class-D amp. That would be very interesting!

 

[von Ah]

The DH-220C is a recent Bob Cordell design, updating the circuit of the original Hafler DH-220 (which was an Erno Borbely design). Credit where credit is due. 👍

I will certainly compare!

 

[von Ah]

Preliminary testing has graduated to the main system. Tape Plank Amp sounds very good with my Manzanitas, ACP+, E30 DAC, and SlimDevices Squeezebox! 🤗

 

[mga2009]

Preliminary testing has graduated to the main system. Tape Plank Amp sounds very good with my Manzanitas, ACP+, E30 DAC, and SlimDevices Squeezebox! 🤗

Good to hear they are good!

Do you have any objective measurements to compare it to other amps?

Cheers.

 

[von Ah]

I haven’t been successful with THD measurements using REW, yet. When I get that sorted, I will certainly measure this amp.

 

[stvnharr]

Orchid Audio XLR Converter sitting on top of Starkrimson Ultra

 

[Sous]

ultra simple class D amplifier,100W
No need for a heatsink 25W RMS

 

[orchardaudio]

Customer's 5ch Built

 

[Fsatsil]

I’m in the process of building a sub $100 budget class D amp in an old Adcom gfa535 chassis. The amp consists of a pair of $15 L15Dsmd(irs2092) boards, a pair of $20 switching power supplies, $15 worth of surplus caps and a few bucks worth of wire and connectors.

 

[Fsatsil]

I wired it up temporarily to make sure everything works and surprisingly it didn’t blow up and actually sounds pretty good!