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Attn: Speaker DIY expert

I want to upgrade the crossover on my DIY monitor. It's a Jim Griffin design with Jordan JX92s and Aurum Cantus drivers. I put some no name brand crossover parts from Radioshack on it . Can somebody tell me what is the best capacitor, resistor and coil to buy. Please include the type and brand and the store where I can buy them.

Here is the list of parts that I need:

L1 = 1.5 mH 16 awg.
L2 = 0.3 mH 20 awg.
C1 = 6.8 uf
C2 = 5.1 uf
C3 = 15 uf
R1 = 8 ohms 10W
R2 = 3 ohms 10W
R3 = 1 ohm 10W
PCB board.

Thanks everyone, I appreciate taking your time.
royy
somec59
245 posts
 
Look up Solen electronics for parts
Also look at Parts Express for ready made xovers
s7horton
1,077 posts
 
madisound.com would be your friend. I agree, stick with caps and resistors. You can start with something like solen for a few bucks per cap and go al the way up to Mundorf silver or gold and spend a couple hunderd per cap.
chadeffect
586 posts
 
The above answers are all good.

The nicely priced sonic caps are great especially when bypassed with mundorf Caps (silver in oil are good, but the gold ones are amazing if you can afford them). On their own the sonic caps can have a slightly plastic quality although great dynamics and detail. Bypassing with a mundorf 0.1mf or 0.01mf makes for a pin point image with very rich natural texture.

Try the Caddock metal film resistors. I have used the mills, but once burned in the Caddocks are more coherent and have less noise.

Alpha core copper foil inductors are stunning too. The DCR value may be different to what you have, but I doubt dangerously so.
rodman99999
6,206 posts
 
Whatever you need can be found here:(http://www.percyaudio.com/Catalog.pdf) And Michael will also match whatever you order within 1% tolerance. I've dealt with him for years and have yet to be disappointed. Normally I use Vishay Bulk Foil resistors in projects, but actually wire-wounds are known to be quietest. Alpha Cores are the best inductors around, but(as mentioned)a resistance mismatch can cause a shift in your roll off points. The Percy catalog will give you a lot of other ideas also(cabinet damping, binding posts, internal wiring, etc.). Have fun!!
palerider
46 posts
 
A resistor-tip: to make a good free-flowing resistor you can use lets say 4x32ohm in paralell to gert 8ohm aso. This reduces filter-resistance, the main reason for dynamic loss in passiove filters. Allmost any cheap resistor will do. Components in paralell are the worst dynanic-killers, but this trick lifts the filters power-capasity a lot.

You can do the same with caps in the lower section; only that here the values are added. Like 3x33uF makes a faster 100uf.

For top-caps I`ve used Intertechnic SCR tinfoil. Needs a few months to open up but then they dissapear totally. Not too overpriced ;)
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