Infinity Renaissance 90 questions

hi timpani,

i may try your tweeter crossover mod in the future on my ren 90's, like i said after completing the k9 mod and comparing it to the ren 90's, you can really hear how the high frequencies roll off on the rens, being that the k9 has the smaller and faster semit in it, i don't know if you can get the rens to equal the k9's performance over 10 k, but i think i can equal or better the k9's dynamics as the rens tweeter is a little larger.
greg

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