SelligAmert

Hello, My modified RF7 crossovers are finished. I use Intertechnik AudynCap MKP+ capacitors (5 et 12 uF) (http://www.riviera-acoustics.com/catalog/product_info.php?cPath=46_35_57_50&products_id=203), intertechnik inductors parallel to the TW and Caddock MP825 resitors. For the capacitors which are parallel to the TW, i use Audyn Cap MKP QS (less expensive) The 0.75 mH inductor has been kept but the capacitors parallel to the woofers has been changed by AudynCap MKP+ capacitors. The componants have been soldered directly wituhout using printed circuit. I modify the wire between the TW and the crossover. The low pass filter is inside the loudspeaker, the high pass outside. The results are smoother and more accurate high frequencies which allows better rendering of voices, cymbals and stringed instruments. More clarity from medium frequencies to high frequencies. Bye,

Hello, I think there is a mistake on the picture for the low pass filter. The 1 Ohm resistor should not be parallel to the woofers but should take place between the capacitor and the - of the woofer (CR // woofers). An other detail on my filter is that the tweeter is plugged in opposite phase respect to the woofers. Bye

In fact, i would like to make a totally new filter outside the loudspeaker(but with same value especially for the inductor) to keep unaltered the original Klispch crossover. I would like to find inductor with about the same characteristic (DCR, L) as you have mentionned for the bass pass. Is it possible to find this kind of inductor ? If not i will use the original inductor. I expect to use caddock resistor (1 ohm 25 w) for the high pass with caps which i have to choose (auricap or Mundorf siver/oil very but very expensive !!!). Is it possible to find some air inductor (.30mH and .125mH) with about the same characteristic ?

thank you for your answer. The DCR is effectively a coil property which is important and which has not to be neglected. I have now all i wanted to know.

Hi DeanG, The unit for the caps is uF as micro Farad=10 -6 F, is not it ? Coud you confirme that it is 0.30 mH, 0.125 mH and 0.75 mH ? ".7DCR", ".4DCR" and ".3DCR" What do they mean ? Many thanks

Many thanks DeanG for your detailled and quick answer. I will study it carrefully tomorrow. Gilles

Sorry i don't understand what you mean. I want to test upgrade for the crossover using better componants (with same values) especially for the caps without changing the original crossover.

hi, I would appreciate if someone who made the measurements of the two inductors of the High pass could give me the values. The first one bypasses the circuit after the 1 ohm resistor and 5 uF cap (+ input) and the second corresponds to the ICR combination parallel with the TW. I read that the value of the low pass cap is 0.75uH. Is it exact ? Just an other question : when 2 capacitors are put in parallel to produce the value of the capacitor to change, is it a better way to use about the same value for the capacitors or very differents values ? Anyone has evaluated the effect on the sound of the cable terminal made in poor (i suppose) metal ? Many thanks,