It would seem Amir would not agree with you: "Measured performance is just a bit worse than Purifi reference design as power increases beyond 25 watts or so. Not an audible difference but would be good to figure out where this is coming from. I can't detect any improvement from Sonic Imagery discrete 990enh opamps. So personally I would go with the stock gain stage and save enough money for a night out alone."From a technical perspective, using Hypex eval buffers is NOT the way to go.
I don’t think the input buffers in that review are the stock Hypex evaluation/development modules that @BoXem was referencing.It would seem Amir would not agree with you: "Measured performance is just a bit worse than Purifi reference design as power increases beyond 25 watts or so. Not an audible difference but would be good to figure out where this is coming from. I can't detect any improvement from Sonic Imagery discrete 990enh opamps. So personally I would go with the stock gain stage and save enough money for a night out alone."
ASR Nord Purifi Review
Yes, Amir compared stock Purifi EVAL-1 buffer versus discrete opamps. VTV cheapest option is stock Hypex buffer. These are different.I don’t think the input buffers in that review are the stock Hypex evaluation/development modules that @BoXem was referencing.
1. I don't see the relation between the review you mention and Hypex buffersIt would seem Amir would not agree with you: "Measured performance is just a bit worse than Purifi reference design as power increases beyond 25 watts or so. Not an audible difference but would be good to figure out where this is coming from. I can't detect any improvement from Sonic Imagery discrete 990enh opamps. So personally I would go with the stock gain stage and save enough money for a night out alone."
ASR Nord Purifi Review
I am currently happy with the "Hypex Factory Buffer" that VTV supplies. I have experience with opamp rolling using my Burson Lycan Headphone amp and have a dozen or more discrete and packaged opamps by many of the "hyped" brands. While an interesting exercise, I am not convinced going with a boutique opamp design will yield more "quality" over what I have now. For my first Purifi amp, I wanted to stay close to the default sound.Yes, Amir compared stock Purifi EVAL-1 buffer versus discrete opamps. VTV cheapest option is stock Hypex buffer. These are differente.
Where is the double like button?For reference, here is the schematic of buffer in the Hypex NC500 eval board.
View attachment 88912
Here is the Purifi eval board buffer. Notice the missing components in the Hypex eval board?
View attachment 88913
Where is the double like button?
Yeah, I'm still wondering whether getting the VTV amp and retro-fitting the neurochrome buffers might be the sweet-spot for return on effort. As long as you don't blow it up, of course.It should be noted that you can buy the VTV Purifi Amp for 969 so if you're not married to the idea of the eval 1, you can get an assembled amp for less than the price of the components. Or even as a source of components for a diy project it might be a good deal.
Hi,
What is the problem with the stock speaker connectors (the banana ones) of EVAL1 board ?
Why everyone wants to change them ?
+Thanks Andrew for your reply.
No, my question was not specifically about the last 2 pages.
I have seen that "problem" since the beginning, and I'm wondering why ?
it's not solid enough ?it's too limiting the wire size ?... ?