Are these supplies safe to use?
Do they carry any safety certificate? EMC test etc.
Just a question before I buy
Thank you
Do they carry any safety certificate? EMC test etc.
Just a question before I buy
Thank you
Probably. They seem pretty well made.
Maybe. That's probably a better question to ask Connex directly.
The Mean Well RPS-series is good too. That does come with all the various regulatory approvals. Unfortunately they don't have much around ±30 V. 27 V is the closest and that's only available for the RPS-400 (and maybe the RPS-300 as well). Note that the 36 V RPS-400-36 has a tendency to whine audibly at light load so it's not a good choice for an audio amp. The RPS-400-27 is fine.
Tom
This is quite late but I wanted to post my experience building an 11 channel modulus 286 power amp (split into two enclosures of 5 and 6 amps each) to drive a 5.1.4 channel atmos home theatre setup.. Notably I’m only using 9 channels at this stage but built headroom to go to 7.1.4..
I purchased the 11 modulus 286 kits from Tom in August 2020 and proceeded to build the 11 channels into two Dissipante 3U enclosures using power 686 boards and the older soft start modules that were diy build. Given the scope of the project I had probably half a million questions during the building process plus some minor trouble shooting issues to work through, all of which Tom painstakingly answered throughout.
At the end of that process, I then realized the benefits of going balanced/XLR and again he helped as I built a paired preamp using his universal buffer and preamp power supply modules in order to convert the single ended signals my Denon x3700 preamp was delivering to balanced, and again he went out of his way to help throughout.
More recently I engaged in another project to build a 9 channel muses digital audio control preamp which used some of the universal buffers and power supplies I had previously purchased and he was a hugely helpful resource throughout.
Not only do the preamps and amps sound fantastic, and are a huge reason to head down the 286 route, but Tom is utterly deserving of respect and admiration for the amount of post purchase support he provides. Anyone considering purchasing should have no doubt when it comes to to the caliber of the building documentation, the amp performance and the post purchasing support.
Thanks very much Tom!
I purchased the 11 modulus 286 kits from Tom in August 2020 and proceeded to build the 11 channels into two Dissipante 3U enclosures using power 686 boards and the older soft start modules that were diy build. Given the scope of the project I had probably half a million questions during the building process plus some minor trouble shooting issues to work through, all of which Tom painstakingly answered throughout.
At the end of that process, I then realized the benefits of going balanced/XLR and again he helped as I built a paired preamp using his universal buffer and preamp power supply modules in order to convert the single ended signals my Denon x3700 preamp was delivering to balanced, and again he went out of his way to help throughout.
More recently I engaged in another project to build a 9 channel muses digital audio control preamp which used some of the universal buffers and power supplies I had previously purchased and he was a hugely helpful resource throughout.
Not only do the preamps and amps sound fantastic, and are a huge reason to head down the 286 route, but Tom is utterly deserving of respect and admiration for the amount of post purchase support he provides. Anyone considering purchasing should have no doubt when it comes to to the caliber of the building documentation, the amp performance and the post purchasing support.
Thanks very much Tom!
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Yes...2 hips and a hurrah for Tom Christiansen!
@mcphervi
Happy you got great sonics, enjoy your builds!
Best,
Anand.
Don’t worry - that was an early pic and the wire nuts are long gone! Had something like four 14g solid core wires on each side set up for the power rails to each amp and that was a quick and dirty way to get it connected to test initially. Were swapped out later - I should really make some new pics but don’t really want to pull apart the whole setup haha.
And now there's a Modulus-286 build video:
Tom
Tom
Something exciting is brewing in the Modulus-286 world. Drip, drip, drip... 🙂
Tom
Tom
I collected some photons for you. 🙂
Modulus-286 Rev. 3.0:
Tom
Modulus-286 Rev. 3.0:
Tom
... also: One of the most requested modifications on the Modulus-286 Rev. 2.0 was to lower the gain from 26 dB to 20 dB. That was easy to do ... if one has access to hot tweezers. For Rev. 3.0 I decided to add a jumper so folks can choose between 20 dB (default) or 26 dB. Gains higher than 26 dB can be reached by connecting a resistor across the jumper pins.
Tom
Tom
Now available for purchase: https://neurochrome.com/products/modulus-286
The design documentation and data sheet will be uploaded to the product page within the next few days.
Tom
The design documentation and data sheet will be uploaded to the product page within the next few days.
Tom
Oh... I forgot the high-power THD measurement in my post yesterday. Here it is:
Tom
Tom
The full design documentation and data sheet are now available in the Downloads tab on the Modulus-286 product page: https://neurochrome.com/products/modulus-286
Tom
Tom