Hotrod your Hermes


I've owned the new 24/192 Kora Hermes for several months now. Right after I got it, I commented on one of the threads about the excellent performance of this DAC, especially at it's price point. I promised to provide a more thorough review of this DAC after it had some time on it. Unfortunately, I failed to do this. Reason being, I began modifications on this unit after observing the open architecture inside it. Since then, I have done the following:
1. Replaced the stock tubes with Seimans gold pins (Be careful doing this. The current Hermes has pin type tube sockets with springs inside them. Lose a spring, and your tube won't make contact. No warnings in the manual about this. This happened to me. Luckily, JC Audio exchanged my "missing springs" DAC for a brand new one. Great customer service!! In the future, Kora plans to change these sockets)
2. Top Hat tube dampers
3. Audio Magic 99.999 silver wire on all inputs and outputs
4. Shakti on-lines on the circuit board
5. Shielded the two transformers from each other and the circuit board using non-magnetic MU metal
6. Replaced all caps with a mixture of MIT, Hovland, and high precision oil caps
7. Shakti stone on the transformers
8. Replaced input and output jacks with WBTs
This turned this already excellent DAC into....A MONSTER!! Why? There is only one way to describe the performance of the Hotrod Hermes. IT'S ALIVE!!! The silence of the background is stunning. The images are more palpable and more full bodied. The soundstage is deeper and wider. The background is blacker, and details you never believed were on redbook CDs are now clearly audible. Yet this DAC remains extremely musical. This is by far and away the best DAC I've heard. Not an analytical bone in it's body. A friend of mine also modified his this way, and will add to this thread about his impressions. Jerry Ramsey of Audio Magic suggested many of these mods, and did the serious ones. He does excellent work if you need someone to do it for you. If you own a Hermes, you must consider doing all or some of these things. The potential to make an already excellent DAC into a world beater is huge with this thing. And the cost of the DAC and mods keeps you under $2500.
glreno
Hi John! I don't think Jerry could add the toslink. The last DACs I owned were the Altis Reference and Audiomeca Enkianthus. The Kora was as good or better than either WITHOUT the mods. My friend who also had his modified the same way had the DCS Delius and the Audiomeca Enkianthus. He also thought the stock Kora was better than his previous DACs. The comparison between the Enkianthus and your Audio Aero should be significant, since they both use 24/192 DACs with the Anagram Technologies resampler.
Glreno, the retail price of the Hermes has jumped to $2499 now. So with the mod it will surely go beyond $3000 mark. I'm also thinking about getting the Hermes, but I'm not comfortable with doing many of the mod myself. I know enough to put together a Bottlehead Foreplay, but that's about it. How difficult are these mods for a person like myself? Also, how do I contact Jerry at Audiomagic? Thanks.
Hi Tk4qmmt! If you're not comfortable doing the mods yourself, don't. I'm with you. I had Jerry do the caps and the wire. He also has the MU metal for the shielding. The other stuff is easy, as long as you are careful removing the tubes. He does a terric job, and it works when he's done. Even at $3000., it's a screaming deal for the sound quality. You can call him at 303-369-1814.
Thanks for your reply, Glreno. How much was the total for the mod? Does Jerry have an e-mail address? Thanks.
The cost of the new Hermes already reflects 99% of the mods mentioned by Glreno except for different parts used in the mods which is more a question of taste than what is better or not. The new Hermes is in line with the new Reference series which is to utilize the best components available. Except for the shielding on the transformers and upgraded tubes there is not a lot I can see to bring the total cost to $3000 other than a really high end power cord and NOS tubes. The Auricaps are considerd to be some of the best in use today and the new internal wiring utilizing Jena Labs cryogenic deep immersion process is about 1000% better than the old stock wire and is probably in the top 1% of hookup wire available today. So I doubt there will be much more hot-rodding to do as Kora already did it. For people with the previous versions of the Hermes contacting Jerry would be a smart thing as the improvements to the already incredible sound with new wire and Caps is nothing short of astounding! I am very comfortable sending purchasers of the non modified units to Jerry as he does a very professional job. As to the benefits of transformer shielding or not, the designer feels it is unnecessary but that would be up to the ultimate purchaser to decide. As that is not a expensive upgrade from Jerry I believe at around $100 it wouldn't hurt to try. I would recommend if one was on a budget to upgrade the power cord and tubes before any other mods as they make a huge difference without any internal modifications.