So in my never ending thirst for change, I am going to try out a Mid tweet mid set-up in my front doors. I have a set of RS180-8 and currently use my fr89's. After a little research into MTM designs and their inherent dis/advantages I think its very doable and with some T/A and EQ might give me strong midbass without nearly as many components. My plan is two RS-180-8's in each door with a as small a center to center distance as possible. Normally, it is my understanding that 2K is about the highest a 6.5 MTM design can go for the lowpass. I had done two mach 5 mids befor in a similar fashion but unkowingly ran them to 3500 or so. . Didnt sound bad but not as clear as I like. I can only hope that with an active set-up, I can dial in the best crossover point. I will use the FR89 to not only lower the mids crossover point but also for loudness. A tweet playing means redustion in power handling/loss of sonic clarity at high spl. A 3 inch widebander playing that high allows more power handling/ sonic clarity. To be honest, I loved the FR89's high end. The cymballs sounded good. I had them crossed at 500 on my 4.150pdx with an sls 6.5. They were great until I cracked them. So a crossover of 1200 or so will help substantially with that clarity. (i hope) The rs180's will be one per channel on the PDX so about 75 watts a mid. I will also be trying my new ARc audio 1000.2T on my sub. I have an audiopipe 1800 mono here now @ 4 ohms for clarity. But after a long look at specs. The pipe puts out .2 distortion at 30% power at 4 ohms!!!!! Arc is .01 no impedance marked. I spoke to rep at arc audio(because that amp is special) and he said next time he talks with Robert(zeff) he would get me more exact distortion figures and efficiency numbers.
Speakers: Dual RS-180-8, FR89EX-4, RF T1 12 (4 ohms)
Amps: PDX 4.150(midbass), RF power T5002(mids/highs), 1000.2T(sub)
Crossover: Active 24 or 12 DB. RF can do both on input and pass through.
I figure, with my little bit of knowledge, that I should end up at around 1200 on the crossover. Thsi will work with my center to center spacing and still allow th fr89 clarity at high levels. Does anyone have a program to tell me my SPL limtis? IE wattage vs excursion on the RS 180's. My doors are well sealed with wood and the woofers will be mounted to a 3/4 inch baffle. Im hopin for a 60 hertz LR4 highpass but again, its all dependent on SPL.
As an aside, does anyone think that an vertical MTM or TMM would work better then the horizontal MTM? Assumedly, the vertical MTM would place the MIDS equidistant from the listener. also after more reading, I plan to use an 800 hz low pass on the RS180's. what affect will this have on the sound?
Speakers: Dual RS-180-8, FR89EX-4, RF T1 12 (4 ohms)
Amps: PDX 4.150(midbass), RF power T5002(mids/highs), 1000.2T(sub)
Crossover: Active 24 or 12 DB. RF can do both on input and pass through.
I figure, with my little bit of knowledge, that I should end up at around 1200 on the crossover. Thsi will work with my center to center spacing and still allow th fr89 clarity at high levels. Does anyone have a program to tell me my SPL limtis? IE wattage vs excursion on the RS 180's. My doors are well sealed with wood and the woofers will be mounted to a 3/4 inch baffle. Im hopin for a 60 hertz LR4 highpass but again, its all dependent on SPL.
As an aside, does anyone think that an vertical MTM or TMM would work better then the horizontal MTM? Assumedly, the vertical MTM would place the MIDS equidistant from the listener. also after more reading, I plan to use an 800 hz low pass on the RS180's. what affect will this have on the sound?