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In Reply to: Jensens versus Audionote PIO caps posted by WilliamAl on November 8, 2006 at 14:29:20:
Bill
Before you spend big bucks on Jensens or audionotes,I would try K40s or Vitaman Qs..They are a fraction of the price because you buy them surplus now on ebay from Russia and the vit Qs from sellers in the USA but honestly they are a true paper in oil cap and not just impregnated in oil like the Jensen and audionotes are.
Im not knocking the Jen or AN but you can do a lot better for a lot less and Im almost sure you will prefer them to the newer caps.
Follow Ups:
I recall reading in an early issue of Sound Practices that the Vitamin Q caps did not fare well.Donald North
Donald
I use vit Q and k40s in every amp I own from mac mc60s to my HK citation 2 to heah w5s to eico hf50s and my AES/811 which have the only coupling cap as standard equipment is the vit Q.You have to understand that when they test caps,they dont give sufficient break in time and both paper in oil and teflon caps need massive amounts of break in time to perform their best.All of original caps that went 95% of the early amps were paper in oil black beauties and the bumble bees..THey sounded fantastic for many years but now they have better.I learned not to take advice from a magazine because all they are is people like you and myself with an opinion and I have all the test gear such as a tektronix dist analyzer and a sound technologies master freq oscillator and of course my 100mhz dual trace HP scope not to mention my real time analyzer on a pc with a nice sound card for testing the parameters of the whole system..I use electrostatic speakers a la martin logan monoliths and I have an 811 altec horn system.
When I came to the conclusion about the military pio caps being so good it wasnt just a slam dunk although they did take me by storm.Take a look at article and it goes in more detail about why pios are so good for audio.
Don't forget the Russian teflon. When you damp it with clay or put it in a block of wood it is close to the absolute best attainable. Ridiculously inexpensive also.
I'm in total agreement with DHT4Me - it's amazing how good the Russian teflons sound if properly damped.I've always thought very highly of the Jupiter Caps as well.
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