Amp for Shahinian Diapasons

Simon,
Thank you for your response but many factors can be at play in marring an otherwise worthy system. We have all seen this and it could have been at play during my audition of this system. I also like to think I know what music sounds like since I am married to a professional Musician.

I had an interesting occurrence yesterday. I have a single CJ Evolution 2000 (used to have 3 when I had Apogee Scintillas) that I had planned on using with the Shahinians.
I spoke to both the seller of the speakers and Dick Shahinian regarding which speaker terminals to use with the speakers. There are 3 different places that one could hook up the speakers with and it is quite confusing. Anyway, both Shahinian and the seller told me you could use either of the main terminals. I selected one of the terminals and turned on the amp. It sounded horrible to say the least. There was no treble and the midrange was terrible. I was really afraid that the CJ was malfunctioning. Last night, on a lark I felt agitated that this huge amp couldn't be used for this speaker and I decided to see if anything would change by trying the other speaker terminal. Once I did this, I was stunned! There was treble and midrange and speaker came to life!

It is ncredible that I was going to get rid of a perfectly good amplifier because the speakers were not correctly connected to it! Tonyptony told me the that the Ultravalve by Van Alstine worked great for his Diapasons so I couldn't understand why my 114 pound Evolution 2000 couldn't work as well. Anyway, I am enjoying the sound without the additional expenditure of a new amp.

I should have warned you about that! (Or asked you!) Depending on how the terminals are hooked up / used, you will get different crossover configurations. In fact I've had mine in one place for so long that I can't remember what the particulars are for the other possibilities. AAMOF, depending on how this particular pair were ordered it would be possible to bypass the crossover entirely if one chose to do so.

BTW, I had mentioned the AVA Ultra 550, not the Ultravalve. The 550 has a bit more umph behind it (!), just what the Diapasons need. Good luck with your new sound! Report in when you've had a chance to hear what it does.

Tonyptony, Sorry about quoting the wrong model number of AVA. You did in fact say the the Ultra 550. I very much appreciate you telling me about this because it had me continually trying to figure out the problem with the CJ amp. When I looked underneath the Diapasons the first time I was completely perplexed. I really didn't understand what was going on and probably still don't. Do you by chance have an owner's manual for these speakers? I can tell you even at this early stage that they are excellent! They are very revealing of cabling in the other parts of your system. I changed the power cord of my preamp today and it made a huge difference.

I honestly don't remember what I got or where it might be now. I suspect it's packed away in the basement somewhere. Best bet is to call Shahinian Acoustics mid-afternoon (Eastern time) and ask for Vasken. I'm sure he can walk you through it.

Or email him at shahinianacoustics@yahoo.com and get the directions in writing. Easier to remember that way.