Monitor 5B crossovers
DeRod
Posts: 131
Going to try an inexpensive recap. Wanted to check the values of the old caps as well.
Comments
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That’s the old 34uf electrolytic cap ☝️
The old 12uf ☝️ -
The DF of 70.3% @ 10kHz (8% @ 1kHz), for that tweeter cap is insanely high (not to mention the ESR)! Polk specified DF less than or equal to 3% @ 1kHz for the caps in the Series II crossovers, on their schematic.
Dissipation Factor refers to the tendency of the dielectric to absorb energy, which would be very undesireable for high frequency sound reproduction especially.
If you're not testin', you're guessin'. 😉
Post edited by Gardenstater onGeorge / NJ
Polk 7B main speakers, std. mods+ (1979, orig owner)
Martin Logan Dynamo sub w/6ft 14awg Power Cord
Onkyo A-8017 integrated
Logitech Squeezebox Touch Streamer w/EDO applet
iFi nano iDSD DAC
iPurifier3
iDefender w/ iPower PS
Custom Steve Wilson 1m UPOCC Interconnect
iFi Mercury 0.5m OFHC continuous cast copper USB cable
Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
Custom Vibration Isolation Speaker Stands and Sub Platform -
The old resistor measures 2.8ohm .. the new new mills resistors measured 2.7ohm.
The 3 Jantzen caps together measured 34.34uf
The Clarity cap measured 11.82uf
I’ll work on the second one tonight and check all the caps on that one as well.
