AudioNervosa
Self Medicating => General DIY => Topic started by: orchardaudio on December 22, 2020, 01:47:02 PM
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The purpose of this thread is to gauge interest in these modules, please see the link below for full info.
Full info here.
https://www.diyaudio.com/forums/vendor-s-bazaar/364831-500w-4ohm-gan-class-modules-starkrimson-ultra.html
(https://www.audiosciencereview.com/forum/index.php?attachments/new_amp-jpg.100777/)
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The webpage link is not working.
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The webpage link is not working.
Fixed. Thanks for heads up.
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Leo, as you know, I've got a pair of your BOSC amps (now known as Starkrimson I believe). They sound amazing.
How will this new design differ from the amps I currently have?
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Leo, as you know, I've got a pair of your BOSC amps (now known as Starkrimson I believe). They sound amazing.
How will this new design differ from the amps I currently have?
The sound will be very similar as it uses the same modulator as the existing amps. The difference is that the GaN power stage will be completely different. The power supply will also be different.
I am expecting objective performance to be slightly improved.
The big difference is the power output as you know the current amp is only good for 150W. The new ones will do 250W into 8 ohm and 500W into 4 ohms.
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Leo I have heard you previous amps and have no doubt that this will be a great sounding piece. However while a 500W amp would have done a great job pushing my big Theils , it is just way to much power for the small monitors I am using now. So for that reason alone, I would have to say that something like this would not interest me.
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Leo I have heard you previous amps and have no doubt that this will be a great sounding piece. However while a 500W amp would have done a great job pushing my big Theils , it is just way to much power for the small monitors I am using now. So for that reason alone, I would have to say that something like this would not interest me.
Hi,
I still selling the 150W amps. Let me know if you have any questions.
Regards;
Leo
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Update 12/29/2020:
The layout is finished...
I had to make the board 4.85 by 3.75 inches to add some additional circuity, due to feedback that I received for the other board.
Added LED to indicate over current
Added LED to indicate overvoltage
Added LED to indicate that board is powered up
Still need to do final checks before manufacturing the boards. However, the layout is at a good point to start getting quotes. So please let me know if you would be interested in getting one or two of these.
The board will need the following power supplies:
+/-36 to 42.5V for power stages
+9 to +15V for Driver (referenced to -36V)
+/- 12 to 22V for analog sections
A single Hypex / SMPS1200A100 provides all of the required power supplies. and can power two modules to make a stereo system.
In simulations, this amplifier achieves over 98.5% efficiency at 500W.
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Update 01/02/2021
Some specifications are finalized:
Gain (balanced input): 19.3dB
Gain (single-ended input): 25.3dB
Power output into 8Ω/4Ω: 250W/500W
Input Impedance balanced/single-ended: 44k/22k
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Final pricing is as follows:
2 x Starkrimson Ultra assembled and tested board --> $849.95 USD
2 x Starkrimson Ultra bare board w/BOM --> $99.95 USD (NDA Required)
To place your orders go here:
https://orchardaudio.com/shop/ols/products/strk-ltr-mdl (https://orchardaudio.com/shop/ols/products/strk-ltr-mdl)
The discounted pricing will end on January 31st.
Delivery will take place in March/April 2021.
If you have any questions please contact me through this link:
Contact Us | Orchard Audio (https://orchardaudio.com/contact-us)
If you would like to see the preliminary BOM I have that available now, you will just need to sign NDA.
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The completed modules require no soldering. All connections are on terminal blocks/headers.
J1, J2, J3 are all for different power supplies.
X1, X3 – Amplifier output
J6 – balanced input
J4 – Single-ended input
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I have created a wiring document on how to connect the SMPS1200 power supply to the amp module(s).
https://drive.google.com/file/d/15WSmoonjk5Gu6yQutwwNLtkNgqelcvpL/view?usp=sharing
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For those of you that like op-amp rolling and are purchasing the bare board option, op-amps U1 and U2 can be changed to something else that you may prefer. They are just used as buffer stages for the XLR and RCA inputs. So changing these op-amps to something else is low risk.
However, since the amplifier is DC coupled make sure your op-amp has a very low input offset voltage (Vos)
The package is SOIC-8 with a thermal pad. However, the thermal pad is not needed for all op-amps and can be left unconnected.
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Leo,
You might want to list opamps with low DC offset for audio that have been tested with the amp.
Just a thought.
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Leo,
You might want to list opamps with low DC offset for audio that have been tested with the amp.
Just a thought.
I will only test the opamps that the board comes with. I unfortunately don't have time or equipment to be changing SMT op-amp.
I can help with op-amp selection if somebody needs it.
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I am extending preorder pricing until February 15th.
This to allow me to test the initial batch of modules that have been delayed in manufacturing.
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Just got an email from the manufacturer, the boards are almost ready to ship. Here is a behind the scene pic.
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Preliminary test results. See attachments.
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Nice, I've seen some good reviews of your stuff on YouTube too. Keep up the great work!
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Here is what the final product will look like. More info to come...
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Very nice looking, quality chassis :thumb:
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Due to supply and schedule issues exacerbated by COVID, I unfortunately will need to delay the release of this product. Quality and customer satisfaction are my primary concerns, and I refuse to release a product that does not meet the highest quality standards. I am actively updating the existing design and - as always - will fully test and verify that everything not only meets but exceeds industry standards. I anticipate at this time a June/July delivery and will try my best to get it done earlier.
Those who have already placed a preorder received an email.
For this reason, I have also extended discounted preorder pricing until further notice.
https://orchardaudio.com/shop/ols/products/strk-ltr-mdl
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Should have an update within the next two weeks. My manufacturer is finishing up the latest revision board assembly.
(https://www.audiosciencereview.com/forum/index.php?attachments/70869b1-t-jpg.128526/)
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:thumb:
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I have updated the website and posted test results for these modules. Here are the links:
https://orchardaudio.com/shop/ols/products/strk-ltr-mdl (https://orchardaudio.com/shop/ols/products/strk-ltr-mdl)
Starkrimson(R) Ultra Amplifier Modules -- 250/500W into 8/4ohm | Audio Science Review (ASR) Forum (https://www.audiosciencereview.com/forum/index.php?threads/starkrimson%C2%AE-ultra-amplifier-modules-250-500w-into-8-4ohm.23518/#post-786323)
Please note preorder pricing will end on May 31st.
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I have updated the website and posted test results for these modules. Here are the links:
https://orchardaudio.com/shop/ols/products/strk-ltr-mdl (https://orchardaudio.com/shop/ols/products/strk-ltr-mdl)
Starkrimson(R) Ultra Amplifier Modules -- 250/500W into 8/4ohm | Audio Science Review (ASR) Forum (https://www.audiosciencereview.com/forum/index.php?threads/starkrimson%C2%AE-ultra-amplifier-modules-250-500w-into-8-4ohm.23516/)
Please note preorder pricing will end on May 31st.
👍
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Looking at the back of the board, it seems like there are ~70 points to be soldered. But looking at the top, it looks like several hundred. Are all the chips pre installed?
What is an approximate cost of the BOM?
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Looking at the back of the board, it seems like there are ~70 points to be soldered. But looking at the top, it looks like several hundred. Are all the chips pre installed?
What is an approximate cost of the BOM?
If you purchase the bare boards there is nothing soldered. The BOM cost for two (2) boards is around $450.
You may also purchase the fully assembled ones.
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For those of you looking to purchase the enclosure, you can do it directly from Modushop. Here is the link.
https://modushop.biz/site/index.php?route=product/product&product_id=839&tracking=wmbyh4xCH9d3EPrNg86YhZ0AqT1uFWpURacMebYeX3HLj5uCGIli7LXCS83ITDUX
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Reminder... preorder pricing ends May 31st.
https://www.orchardaudio.com/shop/ols/products/strk-ltr-mdl
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Preorder pricing ends at 11:59 PM EST today.
https://www.orchardaudio.com/shop/ols/products/strk-ltr-mdl
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For those that have ordered bare boards, orders have started shipping. Be on the lookout for an email from shippo (goshippo.com) with your tracking information.
For those that ordered completed modules orders will start shipping in about 2 to 3 weeks.
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All preorders have shipped.
Thank you for your support.