Unofficial Orchard Audio StarKrimson Ultra Amplifier Owners


Reposting details about my loaner Amplifier from Orchard Audio. If there are other owners of the fully assembled or DIY boxes. Please feel free to post here.

Obviously all the "Armchair Engineers" can feel free to either deficate or praise your thoughts on GaN LClass D Amplifiers even if you’ve never heard one but feel to have an opinion. Then there’s the brainwashed Placebo Effected Guys that feel Class D just ain’t there yet. You can post here as well while the rest of us laugh. It’s usually the Geezer crowed that has a n issue with Class D. Anyway here’s my repost :

I actually have the Orchard Audio StarKrimson Ultra on loan for the Arizona A/V Club to get passed around. Leo Ayzenshtat is great to work with and sent us the original StarKrimson (then BOSC) Amplifiers and power supplies last year. Yes, it was a kludgy setup but sounded so good I sent all my PS Audio M700’s & an S300 off to The Music Room ! After I DIY’d some of his GaN boards, they went up in smoke because of a not recommended Power Supply bring up method I had going (long story). But they sounded amazing when I didn’t let the smoke out of them.

Fast forward to the StarKrimson Ultra just received for my review (YouTube & for the Club & Leo). They are amazinger sounding. He’s hit it out of the park again and then some. All the issues I had last year have been resolved. No break in required either. These are out of the box perfect. Understand that I’m an all Tube Guy and I will do a comparison between the currently direct connection form my PS Audio DSSr. DAC into the Ultra and the DSSr. into my BAT VK50-SE then head to head out to the Ultra and my Jolida 3502p KT150 Tube Amplifier.

Speakers in my Evaluation :
KEF R3
Bose 901 Series 1 from 1968
my Homebrew DIY Open Baffle Speakers
KEF 105/3 modified
Future plans of mine are to DIY from blank PCB’s 5 Ultra Amplifier Modules for a kick ass Home Theater setup and for the Summer, use two of those 5 channels for the main L & R. Fall/Winter/Spring would be back to the Tubes for the L & R while the Center & Surrounds would be powered by the Ultra’s. Surface MOunt Soldering for me is easy but the BGA devices will have to be put on by a board shop.

The beauty is you stop listening to the Amplifier and start listening to the music very quickly.
https://orchardaudio.com/shop/ols/products/strk-ltr-mdl
https://orchardaudio.com/stereo-ultra
The ClassD Audio stuff is pretty good too (haven’t their GaN’s) through a friend who had a 250Wx2 built for him.

My Evaluation rig is setup so that nothing colors or influences the (no BAT VK50-SE in the chain - until all reviewing is done this way first)

https://photos.app.goo.gl/ZPGJR1RatZf2ZrzW9
rajugsw

I dropped at my friend's hous Friday with Schitt Freya+ and Starkrimson.

Alas, I did not bring balanced cable and he does not have any.

It is 70 minute's drive thus I just enjoyed his system of Pap trio driven by Dartzeel.

Kindly, he let me borrow his Dartzeel to compare with Starkrimson at my home.

He came to my house on Saturday to compare between Starkrimson, Dartzeel 108 and Line Magnetic 508 fitted with vintage tubes.

His conclusion is my Line Magnetic 508 is beyond both Starkrimson, Dartzeel 108 in overall musicality.

He found Starkrimson sound thin compared with Dartzeel 108 although very transparent with lot of details.

When he came, one of tube in Schitt Freya+ got dead, thus I had to use SS balanced buffer.

He is of the opinion that Atma D matches Dartzeel but Starkrimson is not on the same level as Dartzeel 108/

After he left, I replaced dead tube in Schitt Freya+ and with that Starkrimson sounds much more musical



I sent this link to my friend.

He also agreed that it got much better.

I have few more days to listen to Starkrimson but regard it as good value.

Unfortunately, I can not give opinion between Starkrimson and Atma D.

 

It will be nice if I have chance to audition Atma D before making final purchase decision.

 

Thomas

https://youtu.be/ecBw3Jm-Rhs

 

This one was driven by Line Magnetic 508.

 

My friend's voice is heard of his frustration with his cell phone;)

 

Although I like my LM508, I turn if off after two hour's playing.

 

Thus I am looking for Class D amp for longer casual listening.,

 

So far my impression of Orchard Audio D class amp is favorable with nice transparency and details at reasonable price.

 

Thomas

 

If you tune the sound with tube pre, Starkrimson sounds pretty nice.

I use Sylvania vt231 at input Amperex at buffer in Schitt Freya+ just in front of Starkrimson for balanced output.

Main tower is Scaena 3.2

180hz and up

 

Altec A7 basshorn 180 hz and down