Are there multiple correct crossover versions for Monitor 4 with Peerless tweeters?
volcano
Posts: 4
After reading some reviews and the specifications, I went looking for some Polk Monitor 4s, specifically wanted the Peerless tweeters. I found only 1 pair, on Ebay advertised as "tested", so bought them. They arrived with one speaker with blown fuse and blown mid/woof driver open circuit - suspected a problem in the crossover. When testing the other one for resistance (expecting about 8 ohms), I got inconsistent readings - another crossover problem? (I really wanted to try the Monitor 4, so got a 50% refund from the seller and went shopping for a replacement mid/woof and maybe crossovers, or would update the crossovers.) Luckily I found two MW6500 drivers at a good price. But, when looking for crossovers, I didn't find the same ones I had, but found a different version that appeared to also be for the Peerless version of the M4. Some additional research seemed to confirm that there were a couple of different versions, depending on date of manufacture, and less than disciplined component usage by Polk. The attached pictures show the original crossover on the left, and the replacement on the right. I have installed the replacement crossovers and both of the replacement MW6500 drivers and all is sounding quite good. Can anyone shed light on that original crossover vs the replacement version? Should I consider new capacitors for the original crossovers and careful repair of wiring as necessary? Thanks for your help.
Answers
-
https://forum.polkaudio.com/discussion/38755/polk-audio-speaker-wiring-schematics-amp-more-all-models-except-sda#latest
Those black/red Temple caps are
horrible.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
Here's an earlier thread about this. Some mystery here for sure. Too bad the aliens abducted all the early Polk schematics in order to reverse engineer the technology.
https://forum.polkaudio.com/discussion/comment/2787760#Comment_2787760?utm_source=community-search&utm_medium=organic-search&utm_term=monitor+4+crossoverGeorge / 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 -
I had a pair of early m4's with Peerless tweets about 15 years ago. Reveneered them and rebuilt the c/o's. The c/o's were identical to a monitor 10 c/o. Thought it was odd, but kept all the components to equal values. My thread from back in the day may still be floating around.
-
Sup Bruce?
-
Hey Ivan. Been a while.
