Tenor Hybrid v. VTL MB-450 Sig.

what sonic characteristic or characteristics are you currently wishing to improve upon with the change?

If you have the resources to risk buying something like this sound unheard, then you have the resources to travel to audition it. Alternatively, if you are buying from a dealer who is that sure you will be blown away and consider the increase well worth it, then he should be willing to let you audition at home and return for refund less some relatively nominal forfeiture of deposit as long as you pick up the shipping/insurance if you decide against keeping. Then again, for a sale like this, maybe the dealer should offer to come and install for you at no charge, with you picking up that tab only if you decide to send the amp back with him.

As far as the amps themselves go, I haven't heard any Tenors, but have heard the 450's (and own the 185's), and while they're very good, I do think there is room left for improvement. What you should switch to in order to attain that improvement, and at what price, is your question to answer, preferably with your own ears.

I have owned the Tenor 75 OTL's, and have listened with the Tenor Hybrid monos in different contexts, albeit within show systems. The Hybrids seem to offer far great power handling, yet retain the purity and resolution that made the OTL's magic. The Hybrids and OTL's are in the rare class of amplification that (in my experience) reproduces sound with the fundamental harmonic elements critical to listening involvement--tone, texture, timing, dynamics--balance.

The issue with the OTL's was one of sheer power output, which has been addressed within the Hybrids-- making them far more speaker friendly. If the principles at Tenor used the OTL's as a design reference, then it is sure that the Hybrids--whether stereo or mono, have those most salient musical characteristics. If their performance at the San Fransico and CES shows is any indication,Tenor has a winner on their hands.

I now own and enjoy the Atmasphere MA2 mk2.3 monos (better match with low impedance speakers), but still have a great affinity for the Tenor's extreme textural and timbrel dexterity, displayed in spades at this years CES exhibit.

Zaikesman offers the best advice. Seek out direct experience within your own system and make a buying decision according to system synergy and personal preference.

In terms of asking for comparative impressions, I think it unwise to put stock in forum-bred opinion --even mine :). There is simply too much bandwith used up with touting favorites and product-plugging on this and other forums. It is best to seek out your own experience when contemplating this kind of expenditure.

Personally, I tested multiple SUV's and studied specifics before laying out SUV type cash. Audio systems are even more context sensitive than SUV's yet cost about the same --or more. Use your own judgement when matching amps to speakers.

Zaikesman & Samuel,
Thank you for the thoughtful recommendations. I was referred to a very nice guy in Ohio who inivited me over to listen to his Tenors. However, he does have new Meitner gear and Kharmas. So, I may end up with quite unrealistic expectations. I think the suggestion of a return policy with a restocking fee is great idea. I am very comfortable with that. I have bought many pieces of equipment with that possibility. I kept all of them. I am surprised that I had not thought to make that request. Thank you for the idea, Zaikesman. Samuel, you are right. I really do need to hear the amp in my room with my stuff. It was very kind of you guys to take the time to help. Thank you.