Amps for Avalon Osiris CAT JL3, Boulder 2060, Dart


I recently purchased Avalon Osiris and am considering what amps to use with them. I purchased a pair of Levinson 436's as a stop gap just to have an amp that could drive them while I saved for a better amp. I am using Stealth cables throughout (Indra IC's, Dream PC's and Dream SC's).
My preamp is CAT Ultimate MK2 (line only) with NOS Amperex PQ's. My DAC is Audiologic 24MXL and CEC TL2 transport. I am open to other amps than the three listed above but am leaning toard solid state or hybrid. I am trying to avoid space heaters. Some other amp considerations are VTL Sigfreid, Tenor 300's ...
posbwp555

Showing 4 responses by posbwp555

Sirspeedy I'm glad you responded to this. We have a lot in common. I lived most of my life in NJ and owned the Ascents for about 15 years before purchasing these. I hated to sell the Ascents but I finally had a room that was too large for them and large enough for the Osiris.
I reinstalled my Manley 350's (running in triode) on the Osiris today. What an IMPROVEMENT! After looking at the Osiris threads on agon concerning the Osiris I was misinformed that they were a difficult load to drive. They are easier to drive than the Ascents (by one db).
The Manleys are driving them with much greater authority than the powewrhouse Levinsons. I have the same consideration as you about the heat generated by tube amps.
I spoke with Lucien at Avalon yesterday about amps for the Osiris and he told me he heard them driven by the Audio Note Ongaku (I think a twenty something watt SET). He recommended Spectral or Rowland if I decided on SS. I heard them at the show in NYC in 96 and to this day it is the best system I ever heard. I am financially drained after the speaker purchase and will wait and listen to as much as I can for at least a year before trying something.
I am trying to put my last system together so I can get off this very expensive merry go round. I know the Spectral gear is remarkable with the MIT cabling on Avalon speakers (96 show). I want to try to go in a different direction for now though. I can't afford to do a whole Spectral system in one shot and since you must do that I'm out for now. Two pair of MIT 850 EVO shotgun speaker cables (one bi-wire and one tri-wire)came with the speaker purchase and evidently they work best with Spectral gear because they were awful with the Levinson amp. I should have kept them just in case I decided to go Spectral down the road. I have already sold the tri-wire pair for a song. I may in the future put two sets of electronics together one Spectral (summertime setup) and a tubed setup for winter. I think part of the reason people are constantly changing gear is that no matter how good the system is their ears crave variety. That is why two superb systems with different sounds may be a good solution. I hear the Dartzeel splits the balance between SS and tubes better than anything else. The Spectral are very liquid sounding for SS and just do layering/soundstage
tricks that are jaw dropping. It sounds like you feel the Antilleon has the best of both worlds. I saw one for 10 grand on agon yesterday. I'm tapped out financially right now but there will be other opportunities. I would also like to hear the ASR Emitter. The CAT amps are an option for my last set of tubed amps. So much to do so little money. I am certain that I have found my last pair of speakers though. I loved my Asscents for 15 years the Osiris should hold me for at least thirty. Thanks for the advice and if you have any other thoughts I'd love to hear them. If you haven't heard the top of the line Stealth wires yet check them out, they are on a different level than anything else I have heard.

Bart
Sirspeedy, this may surprise you but I thought the Ascents got slightly hard sounding when driven very hard. I suspect that the amp was the cause of that not the speakers. I was running the amps in full triode. I have only recently discovered they sound much better running in tetrode and it is too late to know now (the Ascents were sold to a friend)but it probably would have been fine at high spl's if I had run in tetrode. I paid special attention to Johnathan Skulls reviews, I thought his sonic values were similar to mine. Now that you have recommended the ASR, I will make a point of auditioning it. I am trying the Nuforce 9 SE's next week. They have a thirty day money back guarantee so it will cost me nothing if they are not keepers. Check out the review on ultraaudio.com. So now on my shortlist of amps to hear are the CAT JL2 Sig, Dartzeel and ASR Emitter. I'll keep you posted and thanks for the advice. Maybe we can meet at the next NYC home entertainment show (It will probably be next year). Bart
I haven't checked this thread in a while. Hodelrecords,
the Avalon Osiris is pretty flat at 4 ohms with a minimum dip to 3.6. The CAT JL2 will drive any Avalons easily and do the bass very well. They have a OTL or SET like mid and you should give them a listen before you go to Atma-sphere. I think one of the advantages they have over other tubed based amplifiers is the use of 6DJ8, 12AU7 and 12AX7 signal tubes. This gives you a multitude of tuning options. Bart
You haven't heard what the CAT JL2/JL3 midrange is capable of if you are using the stock input tubes.

Bart