YY what powercord do you have with the Hydra? I think the EP15A's are like ~$1400 or higher? Look here at A'gon because I think there is 1 or 2 used? I do not have the budget for these higher end conditioners/regenerators. Personally I like my Hydra and what it does. There is a noticable difference with it in. If you have the Hydra 4 then decide for yourself. The Hydra 2 to me is a little more laid back or softer sounding to my ears. The Hydra 4 was a great match for the 27. I think you will like it. I did for sure.
I have never had a 331 in my system but had a buddies 331.5 which is a factory upgrade ($2000) of the 331. It is suppossed to be 2/3's a 334. It sounded very nice with good detail and dynamics. Just a more refined amp. We compared it to my 29. The .5 was all around better but both had the Levinson house sound. It was not a huge difference but noticable. I would love to have a 334 but that is out of my reach right now.
The 331 will outperform the 27 in my opinion. As far as the 27.5 versus a 331 it is hard to say because I did not have one(331) here for comparison. I have listened to a 331 in another system with similiar speakers I have and it sounded very good. Hell it should but some people say the 27.5 is a better sounding amp than the 300 series ML amps. The 331 looks much better for sure. I think they are gorgeous amps. One of the best looking amps ever IMO. The 27.5 price has been going up in value so I think that speaks for itself. I would be happy with either to tell you the truth but if I had to choose I would say the 27.5. Do a search on the 331 and see what you think. Audioreview.com has lots of reviews on both. I like a SS amp with a tube preamp.
I have never had a 331 in my system but had a buddies 331.5 which is a factory upgrade ($2000) of the 331. It is suppossed to be 2/3's a 334. It sounded very nice with good detail and dynamics. Just a more refined amp. We compared it to my 29. The .5 was all around better but both had the Levinson house sound. It was not a huge difference but noticable. I would love to have a 334 but that is out of my reach right now.
The 331 will outperform the 27 in my opinion. As far as the 27.5 versus a 331 it is hard to say because I did not have one(331) here for comparison. I have listened to a 331 in another system with similiar speakers I have and it sounded very good. Hell it should but some people say the 27.5 is a better sounding amp than the 300 series ML amps. The 331 looks much better for sure. I think they are gorgeous amps. One of the best looking amps ever IMO. The 27.5 price has been going up in value so I think that speaks for itself. I would be happy with either to tell you the truth but if I had to choose I would say the 27.5. Do a search on the 331 and see what you think. Audioreview.com has lots of reviews on both. I like a SS amp with a tube preamp.