Charles is right on the mark.
Acoustic Zen Crescendo speaker crossover capacitors ... who makes them?
I own the MKl version of the Crescendo and see the crossover uses all Acoustic Zen branded capacitors. Most are blue in color with the smallest values bring black. Does anyone know what company makes these for AZ? I did email the builder, but no answer. Love any information the community may have on this topic.
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- 97 posts total
Granny, Why not bias the electrolytic caps in the woofer cross over all you need it two (4 for the set) more 1000uF capacitors which Madisound sells, put them in series with the existing capacitors then bias the mid point with a number of 9V batteries in series, four should probably do for 36V. Positive goes to the midpoint via a 1M Ohm resistor negative goes to ground. JBL use this technique in their flagship speakers Alternatively buy 40 100uF metabolized polypropylene capacitors - with that quantity you should be able to get a discount :-) Best of luck Peter |
@pbnaudio Have you done this? I ask as I wonder if this will make these cheap electrolytic caps sound as good as decent metalized poly caps? Very interesting. So I hook up 4 nine volt batteries in series with the positive lead of the first battery going directly to a 1mohm resister then to the junction point of the series caps and the negative lead of the last battery going to the negative return of the low pass circuit. That simple? I better test that no DC is getting through. The electrolytic caps should be non-polar correct? Thanks! |
Granny, Yes I ave used this technique and it defiantly improves the SQ of a Bipolar Electrolytic Capacitor. All capacitors in a Speaker Crossover should be Bipolar as this is an AC circuit. If you google this there are many diagrams on how to connect the circuit, and you are describing it correctly, you must however use a separate feed from the battery to each set of capacitors - luckily 1M Ohm resistors are very inexpensive. One small correction to above post - since you are connecting the capacitors in series each should have a value of 2000uF, a series connection of capacitors results in half the value of each - i.e 2000uF in series with 2000uF = 1000uF https://www.google.com/patents/US7443990 Best of luck Peter |
- 97 posts total