Martin Logan with Sonic Frontier Power 3

I have a pair of Quest Zs powered by a Krell KAV250 & experienced the sound problems as you. I put a Sonic Frontiers Line1 which really helped flesh out the sound but it still got a little bright on the top end so I tried a Pair of cardas quadlink 5c & got a really mellow sound.I have since traded up to a Line3 & Resolution REference cables all around & get a fabulous sound.Try to borrow a tube preamp & you might be very surprised.Should you decide to go in that direction it will be a lot less expensive.The sound problems you have may partially caused by the Wadia & a preamp will really make a difference. I am partial to Sonic Frontiers gear because it is sonically neutral.Good luck.

It is funny cause I was going to start a thread exactly for the same reason. Jfarkas, I have the same equipment well almost. ML ReQuest and 7Bs and yes they are edgy in the high especially at reasonable life like level. All my gear are the SF (Transport 3, Processor3, and Line 3 preamp) the preamp did help, also upgrading to Synergistic Research Resolution Reference all around did help, but still I was not satisfied. It get edgy at the top and too much at the bottom. I set my ML to the -3db bass set up, it was still a bit more than what I wanted, I moved the speakers a little bit apart. That did help in bass but not on the highs. So guess what, I ordered the Power 3.

I have ML CLS's and I love them. My equipment is a Rowland amp and a CJ tube preamp. I used to have Classe solid state but.. I was advised to switch to a tube preamp. I am so happy with my CJ tubes! I'm at newbie at this but when i plugged in my CJ, the soundstage just opened up and the sound was much warmer (not harsh like the Classe). my advice to you is to buy a CJ preamp first b/c I'm very impressed with mine. My next step is to buy a tube amp. I'm looking at BAT, maybe Sonic Frontiers and CJ. (anybody have experience with these?) Well I hope this helps.

Thanks for the feedback. Several of your suggestions put me on the right track. Hooked up a VTL 5.5 preamp. Dramatic improvement. The system is still too bright and "ringy" to me. I am expecting a VTL450 this week as next step. Will post my learning. Myoussif when do you expect your Power3??

I also have a pair of the ML Requests powered by a Bel Canto EVO 200.2(great amp!) I have an Audible Illusions Modulus 1 tube pre-amp. I still have the same forward or bright sound that all of you describe. I have been told to change IC's and see what happens. Coincident or HT Truthlinks have been recommended. Interesting in hearing if any of you have found a solution....