Ever tried putting a cap inline with RCA for XOVER


Hi There, I am trying to cross over my speakers on the cheap.

Anyone ever tried putting a cap inline with an RCA input on a amp to act as a passive High Pass Filter? I am trying to cross over my Wilson Cubs at about 70-80HZ.

My amplifier is a Mark Levinson No. 332 for Reference.

My goal is to build an adapter (Female to male RCA) with a capacitor in there to act as a passive crossover. I know this can be achieved on the interior of an amp but this amp is about as much of a cream puff as youll ever find, Im doing nothing to her (She got completely recapped and upgraded with better parts all around in 09 so shes good for a good long while now)

If that doesnt work how about a good DIY design? Should I go active? I am trying to go not too expensive and potentially avoid another box in my system, but I dont want to degrade my signal greatly, however I do believe a little signal loss would be an ok trade off for less woofer excursion

Which is better, Woofers working hard with more signal or.. working less but a tiny bit less signal?

Oh I play my music loud and listen to electronic music, acoustic is not much of an issue, White Zombie made me realize I was within 75% of the excursion limits at mid volume, I want to be able to play these guys loud and cant hit the high 90DB to 100 or so DB like I want, I am probably chickening out at 90 or so if that.

Thanks

Toby
128x128systembuilder
Be mindful of the units when using the equation Jafox supplied. If frequency is in Hertz, and input impedance (R) is in ohms, C will be in farads (and the answer will be a tiny fraction of a farad). Move the decimal point 6 places to the right (i.e., multiply by a million) to get microfarads (uf), or 12 places to the right to get picofarads (pf).

For example, 80Hz and 47,000 ohms works out to 0.000000042 farads = 0.042 uf = 42000 pf.

Regards,
-- Al
Thank you again, This is going into my long term notes. I lucked out and forgot I had a Velodyne SMS-1 Lying around so I am using that as a crossover for now.

But I really needed to know how to do this.

Thanks a million yall
I second the Harrison Labs FMOD passive x-overs from Parts Express. I've used them successfully in the past to bi-amnp my party system.

http://www.parts-express.com/wizards/searchResults.cfm?searchFilter=fmod%20crossover

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Yep, you can do this, but what will you do about the resulting phase shift?
90dB-100dB will not be an issue because at those levels you'll be deaf pretty quick.