Monitor 7 questions: should mid driver be mw6500 or mw6502?
bridawg
Posts: 4
Greetings all,
I just picked up a pair of Monitor 7's with Peerless tweeters. I should have noticed but did not, that one speaker has an mw6500 mid driver and the other has a mw6502 driver. I've read about the differences and wonder it anyone has/needs a swap of a 6502 for a 6500? I'm assuming these speakers should have mw6500 drivers?
I also was excited to hear the Peerless tweeters as they get so much love here. I am not hearing their excellence and wonder if it's the mismatched mids or if these old speakers need to be recapped to shine. Suggestions appreciated.
I just picked up a pair of Monitor 7's with Peerless tweeters. I should have noticed but did not, that one speaker has an mw6500 mid driver and the other has a mw6502 driver. I've read about the differences and wonder it anyone has/needs a swap of a 6502 for a 6500? I'm assuming these speakers should have mw6500 drivers?
I also was excited to hear the Peerless tweeters as they get so much love here. I am not hearing their excellence and wonder if it's the mismatched mids or if these old speakers need to be recapped to shine. Suggestions appreciated.
Comments
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Yeah you need both drivers to be MW6500. That MW6502 is for the 7C and Series II and is 4 ohm nominal impedance instead of 8 ohms. If some knucklehead did that who knows what else is wrong. Check for voice coil rub, cabinet sealing, proper phasing of drivers relative to each other; Black wire goes to red dot terminal and red binding post nut is the one on the left. Your Peerless are probably soldered but Make sure the black wire goes to the red dot terminal there as well.
They definitely need to be recapped preferably with film types like Sonicap or Clarity Cap CSA and better quality resistors like Vishay/Mills. The electrolytics don't age well even though they were pretty high quality ones at the time. The ESR rises and the DF does too.George / 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 -
Thanks for your input/response Gardenstater, I guess I'll try and be patient and shop around for a used mw6500. You are clearly more educated on the crossovers/recapping piece of these vintage speakers than I am. Is it correct to assume that the crossovers are designed for the same mid driver (6500) and it would make no sense to recap before I am able to find a 6500 to replace the 6502?
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Since you absolutely need to upgrade the caps and resistors you might as well do it now while hunting for the MW6500.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 -
FYI, there's 3 of those drivers listed on eBay right now. You should buy one immediately as they don't come up often.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 -
Thanks for the heads up F1nut, I saw those on eBay but two look like a repeat ad of a seized speaker and the third looked a little iffy. I'll keep watching.
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There are three early ones from a 1978 10A part-out. These things must be getting scarcer because I see more and more of them claiming they work (wink wink) but they are still being sold as "for parts or not working". Pfft. https://www.ebay.com/itm/306553124627
PS: It is still an unsolved mystery as far as how early you have to go to get ones with the "copper clad pole piece" that Polk touted in early brochures but removed from later brochures.George / 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 -
Link removed by Admin
Those 6500s are mine. They work. I am parting out my early 10A that I have with a seized 6500.
Mod note: This is not the appropriate time to post links of items you are selling. Please review the rules on our forums. Rules herePost edited by Ryan_Soundunited on -
Merchjbt, you can't do that here.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 -
F1nut, what did I do that was wrong? I didn't post the link to begin with. I was just commenting that these were my woofers because someone implied that the woofers don't work (wink wink).
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Go awayPolitical 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 -
Tip: You'd be better off not attempting to glue the magnets, than scaring off potential buyers.Don't take experimental gene therapies from known eugenicists.
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The hot glue comes off with little effort, so it's not permanent at all. Much better than the magnets shifting during shipping. From my experience, most buyers looking to purchase these woofers likely have seized woofers they are replacing.
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If you don't pack them with lots of cushioning that hot melt won't prevent shifting on a solid impact. Doesn't bond well to non porous surfaces like metal and ferrite. Also I personally wouldn't take a chance on ones being sold as "for parts or not working" but that's just me.George / 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 -
Here ya go. Just make sure seller says no voice coil rubbing and get them to pack with lots of bubble wrap and peanuts.
https://www.ebay.com/itm/197797207356George / 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 -
Thanks for sharing the link!