RTA12C Crossover Advice

Sea
Sea Posts: 317
in Vintage Speakers
I am about to order parts to rebuild these crossovers. I would like to use Sonic Caps in the areas that it will have the most impact. On the schematic it looks like the 4.4uf and the 56uf are for sure active in the high end. Are all four of the 27uf less? It takes 4 of these per speaker and the $$ adds up quick.

Also, the 56uf is beyond the range of Sonic Caps. Would I better off to use 2 sonic caps to get close to 56uf or use a lesser quality 56uf from another maker?

Thanks in advance for help and advice.
Main-Carver TFM35(2),Carver C11 ,Carver SD/A 360 CD,Carver TX11 ,Grace Digital Tuner, Pioneer PL707 TT,Polk SDA1C
Downstairs -Carver M1.5t, Carver C1 Pre, Carver TX10 Tuner, Carver TL3200 CD Player, Dual 1009 TT,Polk SDA SRS 2.3tl
Study - Carver AV634 Amp, Carver CT7 Pre, Carver DTL50 CD Player, Polk RTA12c
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Comments

  • drumminman
    drumminman Posts: 3,396
    edited January 2015
    Only two of the 27uf are in the tweeter circuit. Re: the 56uf, you can ask Sonicraft to custom make them, or combine two 27uf. Though it's not an exact value, it's only 3.5% off which is within the acceptable range of variance. I think the original caps were +/- 10 % . I haven't looked at mine in a while, but I believe this is what I did.

    If you can afford it go all Sonicaps. These speakers are among the most expensive to rebuild due to the number of caps in the Xover, but they do sound good when you're finished with burn in.
    "Science is suppose to explain observations not dismiss them as impossible" - Norm on AA; 2.3TL's w/sonicaps/mills/jantzen inductors, Gimpod's boards, Lg Solen SDA inductors, RD-0198's, MW's dynamatted, Armaflex speaker gaskets, H-nuts, brass spikes, Cardas CCGR BP's, upgraded IC Cable, Black Hole Damping Sheet strips, interior of cabinets sealed with Loctite Power Grab, AI-1 interface with 1000VA A-L transformer
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  • Faustin
    Faustin Posts: 1,149
    Used Daytons on mine for the shunts and low pass.The money does add up quickly.
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