Kappa 9 vs Martin Logan Quest Z

The Martin Logans are very good. I set up set of the ML Quest Z for a client and they sounded great. However I have owned several sets of Infinity speakers. I would agree that the ML Quest Z sound better than the 9 Kappa, however the 8 Kappa is the sleeper that nobody talks about. In the late 80s when I worked in an audio video store while I was in high school. I bougt a pair of 9 Kappas through dealer accommodation. It was October 1989 at the time and the 9 Kappas were selling like hotcakes. My boss asked me if he could sell my 9ks to a very good customer so he could have set for Christmas and replace my set of 9ks at a later time. So I would not do without speakers the store lent me new pair of 8kappas. To my surprise the 8kappa sounded better than the 9kappa. My dad loved the fact that I brought goodies like this home. He provided the music room & the front end and I bought the speakers & monoblocks Forte amps. When I mentioned to my boss that the 8ks sounded better. In disbelief and several months later when the store had 9ks in stock we did shoot out between the 9k & the 8k and it was unanimous among the store staff we just never mentioned it to the customer we would let the customers form their own opinion. When the store had both models in stock we would know which customers had good ears by which of the two they would pick. It was funny there were some customers that when listening to the 8k thought they were listening to 9k. We would always display them next to each other probably not the best listening environment. In my opinion if buy a set of 8k or the ML make sure you have real amp or both. One of best friends owns my 8k with a set of Threshold SA1A monoblocks . He has refoamed the woofers, redone the crossovers & re-wired the 8ks to this day are damn good. Used in good condition are a steal.

The difference between the two would probably be best know to Bill LeGall of Miller Sound. He is truly a specialist in Infinity speakers and has worked on and improved numerous Kappa 9s. He is Wlegall on Agon just read his feedback. You may be able to send him an email for some really knowledgeable advice.
Since he is not currently selling anything here to my knowledge, there is no financial conflict of interest to disclose

I understand Bill is an authority on Infinity speakers, but Infinity is only half of the discussion.

In defense of my statement about Bill, he has worked on probably every major speaker marketed in this country his knowledge is comprehensive. He has been doing speaker repair and light modification with a perfectionist skill for listening as well as hand labor that few will ever match. He has been immersed in it as his only profession for in excess of 50 years. He is a personal friend who has recommended to me that given my tastes at the time to try Dunlavy and also Mourdant Short. I know he personally uses vintage Patricians and Acoustats in addition to one of the few unmolested sets of IRS V's. He once owned Arnie Nudells show off pair but sold them. I heard them and was floored.

Thx for all the advice, I read it all and will read more too when/if any more appear here...

So (Thesoundhouse) what about a K8 and Quest Z matchup ?

I'm tending to go outside the box this time, but we'll see. I've had Magnepan MGI (they had a 'nasal' sound in a narrow band of the voice freq range, a little similar to the L100's I have/had) MGIIa, and have some SMGa's too. Many other box speakers too...ready to try the Quest z's I think...