Hi guys,
I am replacing the 17-year old electrolytic capacitors in the crossovers of my Infinity Kappa 7 speakers.
These capacitors are rated at 100V.
Will it be ok if I were to use 63V or 50V capacitors as their replacement?
I am thinking of using Elna Silmics as replacements. 100uF Solens are too big and too expensive for me right now.
Appreciate your help. Thanks.
I am replacing the 17-year old electrolytic capacitors in the crossovers of my Infinity Kappa 7 speakers.
These capacitors are rated at 100V.
Will it be ok if I were to use 63V or 50V capacitors as their replacement?
I am thinking of using Elna Silmics as replacements. 100uF Solens are too big and too expensive for me right now.
Appreciate your help. Thanks.
Sorry to resurrect a thread from the mummies, but Google led me here... I have a pair of Infinity Q3 with dual voice coil Watkins. I am therefore thinking of replacing four 600uF caps that are connected in series with chokes and the woofer coils. I like to play loud, and I now have the Hypex nc500 amp from diyaudio user Boggit. It can peak at about half a kilowatt. These speakers can dip to 2 Ohms, as the voice coils are paralleled. I can see no voltage rating on the old caps. They are original (circa 1978).... What do I replace them with?
At 600uF times four, yes anything but electrolytics will be excessively expensive, and I anyway gather that the quality of woofer caps isn't all that critical. Would you agree?
The bypass is interesting. Do you mean to parallel the bipolar electrolytic cap with a film cap of something like 10 or 22 uF? And why is that good?
The bypass is interesting. Do you mean to parallel the bipolar electrolytic cap with a film cap of something like 10 or 22 uF? And why is that good?
You may look at this article it has a little bit about why a bypass cap is sometimes a good idea. http://waltjung.org/PDFs/Picking_Capacitors_1.pdf
Just for the heck of it I looked at Walmart online. I know NOTHING about these but they do look interesting and rather cheap !
Metallized Polypropylene Film 600uF AC 250V Motor Starting Capacitor - Walmart.com
Metallized Polypropylene Film 600uF AC 250V Motor Starting Capacitor - Walmart.com
Amazing how people don't do simple homework.
Infinity Quantum Serie
I'd lose the 600uF in the Infinity QLS 3 altogether. They hardly do anything. Kappa 7 schematic follows.
Quite alarming 2 ohm impedance from the dual-voicecoil woofer. You wonder why separate filters were used on each voice-coil, which must sum to something simpler. Who designs this stuff? LOL
Infinity Quantum Serie
I'd lose the 600uF in the Infinity QLS 3 altogether. They hardly do anything. Kappa 7 schematic follows.
Quite alarming 2 ohm impedance from the dual-voicecoil woofer. You wonder why separate filters were used on each voice-coil, which must sum to something simpler. Who designs this stuff? LOL
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half a kilowatt into 4ohms is roughly 63Vpk. Allowing for a worst case output voltage peak of 70Vpk then I'd suggest the absolute lowest voltage bi-polar or non polar capacitor you can use is 80V. But I suspect you can more easily source 100V bi-polars, if you need them at all !Sorry to resurrect a thread from the mummies, but Google led me here... I have a pair of Infinity Q3 with dual voice coil Watkins. I am therefore thinking of replacing four 600uF caps that are connected in series with chokes and the woofer coils. I like to play loud, and I now have the Hypex nc500 amp from diyaudio user Boggit. It can peak at about half a kilowatt. These speakers can dip to 2 Ohms, as the voice coils are paralleled. I can see no voltage rating on the old caps. They are original (circa 1978).... What do I replace them with?
It's gotta be 100V Non-polars in a speaker that goes so loud.
I usually go by the power rails on the amp. A 20W pc amp has a +/- 30V power supply. Assuming you don't have high-Q resonant LCR circuits which multiply voltage.
A more powerful amp can output much higher voltages.
I usually go by the power rails on the amp. A 20W pc amp has a +/- 30V power supply. Assuming you don't have high-Q resonant LCR circuits which multiply voltage.
A more powerful amp can output much higher voltages.
100V, 600uF plastic film (MKT) will be mighty big and mighty expensive if one cannot locate a special offer.It's gotta be 100V Non-polars in a speaker that goes so loud................
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