Need Infinity Crossover help using RS1 design

[wwiztab]

Ok, I'm going to be working on finishing my Hybrid Quantum 2's. I need some help with the crossover on the tweeters though. Infinity has a couple of models that use the newer model emits in an array of three emits on the front and one rear firing on the back. The RS 1 and the RS 4.5. The RS 1 uses a high frequency tweeter in the center where the 4.5 doesn't. I would like to use the RS1 design. I will be using 3 Emit K's on the front and 1 Emit K on the back. The thing I notice on the RS1 schematic is that the rear tweeter isn't wired out of phase with the front and the high frequency tweeter is wired out of phase with the other two front tweeters. That seems backwards to me, am I wrong? I can really use the help so I can finish these things, thanks.
http://www.infinity-classics.de/technik/manuals/RS_I_technical_sheet.pdf

 

[audiomagnate]

That's interesting. The schematic does show an out of phase high tweeter and and an in phase rear tweeter. I always thought the tweeters used in the super tweeter position were just normal EMITs with half of the holes blocked off. Both the 4.5 and 2.5 have the rear tweeter in phase, which makes sense for a dipole. I've found that the schematic on the 2.5 was spot on, so I'm a little surprised that they would make such a big mistake on the RS1.

 

[dcmaster]

Hi there,

I own the RS1B and I have cotrolled this situation. The circuit is absolute correctly and this is ident with the real crossover of the RS1B. This is not a mistake, but I see it also as little crazy. What ever, it sounds perfect and this is what I want.

For the Q2 I would take the complete crossover for the tweeter(s) part(s) to build this range on the Q2. To the "halve" blocked hole on the RS1B I would make the same on the Q2 "Semit".

What you plan with the midrange area? Emims has no way on the Q2. The dome mids sounds not like the RS1's Emims. They are very different in sound.

If you want the sound of RS1 you should get them before you make many works to "rebuild" an RS1. The bass part of RS1 you will never get with the Q2.

Klaus

 

[cdfac]

the crossover between the high frequency EMIT and the lower ones is first order, and it's typical to have the upper driver be wired out of phase in that scenario (so that the outputs don't cancel at that frequency). the reasoning for having the rear tweeter be out of phase would be to have the front/back tweeters more closely imitate an open-backed dipole driver like the EMIMs. i'm not sure why they wired the rear one in-phase on the RS1's, but honestly it probably doesn't make too much difference.

 

[wwiztab]

dcMaster:
Looking at the schematic, I can figure out the components for the rear and high frequency emits easily.
However the mid emits show a 1.25 ACG, then the 3.5mf cap, then the schematic shows a 15ohm 15w resistor with a 4.5 mF cap and a .6mF A/CB inductor? It actually says .6 "mF" not "mH" inductor and A/CB not A/C. Since I can't find a .6mF inductor on the web anywhere, I'm guessing this is a misprint?
Are those three components wired in parallel with each other like the schematic shows?
The mid emits are wired together in series according to the schematic, correct?
Now after you wire all of these emits together do you know what you have for an impedance on your RS1 emits?