THIS AUCTION IS FOR 2x NOS SIEMENS 4.7uF 630V 640V 1% MATCHED MKV B25832 TUBE AMP MKP IN OIL AUDIO CAPS !
SIEMENS IS A GERMAN COMPANY AND PRODUCES MANY HI-END COMPONENTS.VERY RELIABLE.VERY HIGH QUALITY AND VERY HARD TO FIND!
THIS PRODUCT CAN BE USED IN CROSSOVER OF HI-END SPEAKERS and tube amplifiers/preamplifiers.OFFERS VERY HUGE DYNAMICS VERY BIG SOUND WITH LOTS OF DETAILS
SELECTED FROM 10% STANDART CAPS AND MATCHED 1%
BEST OF THE BEST!
ACCORDING TO THE AUDIO EXPERTS THEY CAN BE COMPARED WITH MUNDORF OIL CAPS!
GREAT PRICE FOR THIS QUALITY!
Epcos (Siemens Matsushita)
MKV B25834 polypropylene in oil capacitor
Epcos was founded by Siemens Matsushita, who sold all its interests in 2006. MKV B25834 is a polypropylene in oil cap like the Siemens MKV radial capacitor talked about previously. Mundorf silver/oil also happens to be polypropylene in oil, so it was not a great surprise that Epcos sounded somewhat similar to Mundorf silver/oil when directly substituted in Mundorf’s place. Not that they sounded the same, mind you, but both shared a sense of liquidity and grace, which helped music just flow effortlessly.
Compared to silver/oil, Epcos had a bit more richness to voices and even more apparent smoothness in the upper-midrange region, but it conceded some sheer resolution and attack. Silver/oil sounded more like a “modern” film capacitor while Epcos leaned more in the direction of paper-in-oil caps without overt darkness or lack of resolution. I was especially glad to observe Epcos not to possess overly rounded or slow bass like some paper-in-oils can.
The Epcos, not surprisingly, sounds VERY much like the Siemens MKV polypropylene in oil capacitor I described earlier. Both sound balanced, if not extraordinarily extended or obviously “airy” up top. Human voices have fluidity, richness, and sparkling liveliness that’s so endearing. If you are a die-hard Teflon or polystyrene fan, you will likely call these poly oil caps a bit slower and not as lit-up, but the fans of the poly oils will call it the opposite.
A great strategy is to use the Epcos with something like Russian K72 Teflon cap somewhere else in the component. K72’s enthusiastic, bold, slightly upper-midrange-centric sound signature complements the ease of Epcos very well while lending the whole package a dollop of Teflon resolution. This combo sounds mighty nice, and I must thank “dweekie” for pointing me to these Epcos capacitors.
■ High dielectric strength
■ High peak-current capability
■ For damping and commutating in the medium frequency range
■ For general AC applications
■ Plastic dielectric
■ Oil-impregnated tubular windings (no PCB)
■ Metal-sprayed end faces ensure reliable contacting
■ Cylindrical aluminum case
■ Plastic or ceramic lead-throughs
■ Mounting bolts M8 or M12