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 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

After auditioning Orchard Audio Starkrimson Ultra for 8 days, I had been listening to Line Magnetic 508 and Rogue Cronus Magnum II fitted with vintage tubes.

8 days is too short to reach clear conclusionl without doing cable rolling or comparsion with other refutable class D amp like Atmashphere or Audion.


But Starkrimson clearly has no serious fault at all.

It sounds very transparent with lot of details.

Soundstage is wide and deep enough ( not the best but close to it).

The reason that my friend Rex found it sound thin compared with Dartzeel 108 could be due to upstream source and super revealing nature of Scaena 3.2

Starkrimson works nice with both Lansche 4.1 and Vaugn Cabernett II.

Thus it is a nice value for sure.

 

I recommend you try it by being in the line for tour.

https://forums.stevehoffman.tv/threads/orchard-audio-starkrimson-stereo-ultra-amp-tour.1148415/


But both Rex and I favor my Line Magnetic 508 fitted with vintage tubes over Starkrimson.

The reason is my tube amp give halo around each instrument and nuanced details.

Next week I will visit Korea to see my 100 days’ old granddaughter.


Luckily, I could attend Seoul Audio show which will be held at Kangnam, Seoul.

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it had been 20 years since I attened the Seoul Audio show which is pretty big.

After being back to US late March, I plant to audition one of Atma and Audion or Orchard Bosc monoblocks.

Then I may give more clear conclusion.

 

Thomas

@orchardaudio 

 

i enjoyed my time with Starkrimson.

 

After I am back to US, i may order Bosc monoblocks as sub amp to my tube amp.

 

best

 

Thomas

https://youtu.be/kmjIqQnG3Kk

 

Starkrimson monoblocks sounds nice driving main tower of Scaena 3.2 from  180 hz and up.

 

Thomas