Infinity Renaissance 90 questions

The main issue with the EMIT as I see (hear) it is that they become very directional above 10kHz and they are too hot on axis and too rolled off when off axis. The tonal balance from 10KHz down is best when 30 dgrees off axis and for that reason I have always found them to sound most accurate when firing directly down the room without any toe-in. These emits are the same as used in the Epsilon but in the Epsilon they are used with a specially designed dispersion membrane which increases their horizontal and vertical dispersion and eliminates the hot on axis response, making them more accurate over a wider listening window. As you would have read in my previous posts my ultimate recommendation is to use a supertweeter to augment response above 10kHz but you need to have some technical expertise to implement this correctly.
If you want to experiment another option is to slightly modify the existing EMIT crossover. If you can locate the 5.6uF solen capacitor then solder a 1uF 2% polypropylene film cap in parallel with it. Then locate the 0.5 ohm (2x1 ohms in parallel) closer to the EMIT crossover input, and remove one of the 0.5 ohm resistors so that it becomes 1.0 OHMS. (Do not touch the 5W 0.5 ohm resistor at the crossover output.)
This mod will remove a saddle in the response between 4 and 8kHz and will allow you to toe the speakers in a bit further without them sounding as peaky in the 10 - 12kHz region.
Timpani

i tried firing them directly down the room without any toe in and i also find them to be more accurate and to me the sound stage also improves, but with 1/4 of an inch toe in i find that they image slightly better in my room, do you angle your speaker back? i like mine about a 1/4" angled back, a laser comes in handy when measuring, i also like them with no angle at all, its amazing how 1/4 of an inch angled back can effect the sound, thanks for the advice, i think your right, the super tweeter is the way to go.
greg

Yes I agree with you re the tilt. None or just a little works best for me too. I also discovered early on that close proximity to side walls kills the soundstage. You need several feet (1m) as a minimum.

I have them 1.30 from side walls and 1.50 from rear. With the "toe in" you can decide how deep you want the stage to be ...

furthermore only the right amplification will produce a completely holografic stage imaging

Hmmm Okeeteekid, Clavil's comments make me think you mod on your K9's may have cured an efficiency problem. Those monsters Clavil is driving his Rens with, and the similarly superb results owners report from similar set ups makes me think that if you can overcome the Ren's efficiency issue, you can really see what they're capable of. I know the Kappas are preferred for those wanting a "big" sound and more bass slam, but I can't believe that, given sufficient high quality amplification, the Kappa's tweeters could be more revealing than the High Energy Emit which Cary Christie described as Infinity's best tweeter to date. The thing is though, the Rens MUST be connected with upstream components purer than holy water & MUST be driven with a LOT of very smooth, clean power. Plug in the wrong amp, and the Rens sound just "ok". But your experience is interesting. I just wonder if with a given set up, the Rens wouldn't outstrip the Kappas..to me, save for the above caviat, they should sound more revealing...

With the above said, if you have hit the jackpot with your current set up, fantastic! It's just a shame you're not in Timpani's neck of the woods, otherwise I might have been able to come over for a listen one day :(