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 drive Lansche 4.2 with Starkrimson full range.

My impression of Starkrimson is very positive.

But amplifier and speakers need to have synergy due to impedance and frequrency aberration.

Thus the best way is to do audition it yourself.

I will send my tour unit to the person in next line tomorrow.

 

Thomas

 

Before seinding it to the person in next line on tour, I took more video clips.

it seems that Starkrims work better with Lansche 4.1 than Scaena 3.2

I plan to write comprehensive review after spening my time with Line Magnetic 508 and Schitt Aegir.

 

Thomas

I attended Pacific Audiofest held at Seattle last July.

Big genesis driven by Merril Audio class D amp sounds really spectacular.

But the combined price of pre and monoblocks is 54k$.

I do not believe that Starkrimson is at ths same level as Merril Audio class D amp.

But it seems to be good value.

As I listen to Scaena through Schitt Aegir again now, I miss transparency and details of Starkrimson although Aegir sounds musical with full body.

 

I am back to one of my tube amps, Rogue Cronuns Magnum II fitted with Tungsol Kt120, vintage Telefuken 12ax7 and Amperex 12au7.

 

As good as class D amp is with transparency and details, tube amp sounds more lively.

 

But if you want no heat and limit of playing time, it is good to try class D amp.

I usually turn  off tube amp after two hours of playing.

 

In that way, i had used my tube amps without any problem for long time.

Starkrimsom got very close to nice tube amp in musicality.

 

Thomas