Monitor 10 some questions

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  • Gardenstater
    Gardenstater Posts: 4,457
    jct74_dk wrote: »
    So worst case I need four new MW6503 to get them matched?

    You think I have to worry about air leak? The pressure test showed that the drivers didn't stay out long but retracted.

    They are not frozen in any way so I guess functional.

    Any idea how to repair the damaged edge on the one picture

    Any 4 MW6503 "should" be matched depending upon Polk Quality Control. If you want to be OCD (lol) it is always best to get them from a parted out pair of speakers and original Polk installs, or to get date codes fairly close if from different speakers.

    I have a NOS 1999 dated MW6500 made in Mexico driver that does not sound the same as my early MW6500s from 79 and early 80s so I can't say for certain that all drivers will sound the same regardless of place of manufacture and date of manufacture.

    Air leak a worry? Yes. It will effect the sound of the speaker.

    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
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  • jct74_dk
    jct74_dk Posts: 33
    It's just because I have to make up my mind to skip them and look for a nicer pair or restore them if you guys think it's worth it
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  • jct74_dk
    jct74_dk Posts: 33
    But how can I be certain I have an air leak or not?
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  • boston1450
    boston1450 Posts: 7,630
    You already know that
    ..
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  • jct74_dk
    jct74_dk Posts: 33
    Based on the pressure test?
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  • boston1450
    boston1450 Posts: 7,630
    Well you could replace or repair gasket. I think you have to reseal cabinets inside. I'd look at cosmetic & you decide. We are only seeing what you posted for pics
    ..
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  • jct74_dk
    jct74_dk Posts: 33
    Yes repairing the gasket and getting new drivers should be easy enough but it's the sealing of the whole cabinet I wouldn't know how to get started with.
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  • boston1450
    boston1450 Posts: 7,630
    edited March 17
    I've resealed many if not all my Monitor & SDA cabinets. It's easy. Just apply bead on all the seams. I wore glove & smoothed it out. I did not have the damage tho.. in your case the POSSIBLE reason is that gasket is damaged. Did the damage already exist ? I see the cabinet is separated by the damage corner & it appears to be a gap going to the front of cabinet. Maybe I'm seeing things here ??? If so that can be repaired BUT you have other damage to corner. So. Question is. Is it worth repairs ? No sure what you have into these $$$ wise. Parting out OR replacing may be your best option. Maybe others will chime in
    ..
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  • Gardenstater
    Gardenstater Posts: 4,457
    jct74_dk wrote: »
    Yes repairing the gasket and getting new drivers should be easy enough but it's the sealing of the whole cabinet I wouldn't know how to get started with.

    Try gasket repairs and careful tightening of all screws evenly. If that doesn't give you a good leakdown test on the passive radiator push, then proceed to running a fillet of PowerGrab or the like on all the inside joints of the cabinet.
    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
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  • boston1450
    boston1450 Posts: 7,630
    ^^^^ this
    ..
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  • boston1450
    boston1450 Posts: 7,630
    edited March 17
    It's been years since I did Monitor 10's or 11's. Remove passive & woofers. Easy fun job. Reglue magnets at same time.. Heck your half the way there already
    ..
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  • jct74_dk
    jct74_dk Posts: 33
    Thanks to you all.

    I really appreciate your help.

    I will have to figure out what to do.
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  • jct74_dk
    jct74_dk Posts: 33
    Does anyone know if the MW6503 midrange drivers also fit in the Monitor 10a?

    Thanks.
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  • jct74_dk
    jct74_dk Posts: 33
    As well as the passive radiator?
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  • Gardenstater
    Gardenstater Posts: 4,457
    edited April 24
    What date is on the crossover? It is better to go by that to avoid confusion. I believe sometime late 84 or sometime in early(ish) 85 they went from the MW6600X/MW6501 to the MW6503. In Oct. of 84 it was the 6600X / 6501 and SL1000 tweeter and in Oct. of 85 it was the 6503 and SL2000 tweeter. These would both be the 10B though. At some point when you go early enough they were using MW6500 I believe, with the Peerless tweeter. Pretty safe to say that it couldn't have been the 6503 in the 10A.

    I couldn't tell ya regarding the passive.

    Audio, Oct. 84

    eqo1hk5ffox9.jpg

    Audio, Oct. 85

    aq3audsny27q.jpg
    Post edited by Gardenstater on
    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
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  • xschop
    xschop Posts: 5,000
    Yep x 2
    Don't take experimental gene therapies from known eugenicists.
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  • Gardenstater
    Gardenstater Posts: 4,457
    Actual evidence trumps an LOL every time:

    d7fhk5njsx2i.jpg

    u5fl1uogs7hr.jpg

    1jlnlp84brrg.jpg
    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
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  • xschop
    xschop Posts: 5,000
    Damn pesky data points get you every time.
    Don't take experimental gene therapies from known eugenicists.
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  • F1nut
    F1nut Posts: 50,494
    He asked if the mid-driver will fit, not if it will work. "Does anyone know if the MW6503 midrange drivers also fit in the Monitor 10a?"

    Reading comprehension trumps all.
    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

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  • xschop
    xschop Posts: 5,000
    If the DCR's are close then they'll work just fine. May have a little different cab bass tuning obviously.
    Don't take experimental gene therapies from known eugenicists.
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  • F1nut
    F1nut Posts: 50,494
    edited April 29
    All he wanted to know is if the MW6503 will fit in the mid-driver bezel hole of the 10A. Of course, the answer is yes. No need for a long winded response.
    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

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  • Gardenstater
    Gardenstater Posts: 4,457
    edited April 29
    Reading comprehension needs to go beyond the literal to the intent sometimes. Just because they will fit doesn't mean it will be optimal, is what my answer implied. Different electrical Q, mechanical Q, and compliance volume of the 6503 vs the original 6500 may effect the performance. Your LOL did nothing to further anyone's knowledge or interest but it made you feel good.

    To the OP, if you want to transfer the 6503s into the 10A cabinet as an experiment, I would advise that the passives should be transferred also because they are designed to work with the cabinet volume but also the midwoofer they are paired to.

    Driver: MW 6500 Driver's model #.
    Brand: Polk Driver's brand name.
    Fs: 31.0000 Hz (Free air resonance)
    Vas: 2.6486 ft^3 (Compliance volume)
    Qts: 0.2190 Total Q
    Qms: 1.3000 Mechanical Q
    Qes: 0.2640 Electrical Q
    Sd: 0.0130 M^2 (Piston area)
    Xmax: 3.1800 mm (Cone excursion, linear)
    Revc: 6.5000 ohms (DC resistance)
    Znom: 8.0000 ohms (Nominal impedance)
    Pmax: 35.0000 watts maximum rated power

    Driver: MW 6503 Driver's model #.
    Brand: Polk Driver's brand name.
    Fs: 29.8600 Hz (Free air resonance)
    Vas: 3.0017 ft^3 (Compliance volume)
    Qts: 0.3100 Total Q
    Qms: 1.7680 Mechanical Q
    Qes: 0.3760 Electrical Q
    Sd: 0.0130 M^2 (Piston area)
    Xmax: 3.1800 mm (Cone excursion, linear)
    Revc: 6.5400 ohms (DC resistance)
    Znom: 8.0000 ohms (Nominal impedance)
    Pmax: 35.0000 watts maximum rated power
    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
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  • pitdogg2
    pitdogg2 Posts: 25,412
    Gardenstater Posts: 4,192
    12:39PM edited 12:41PM
    Reading comprehension needs to go beyond the literal to the intent sometimes. Just because they will fit doesn't mean it will be optimal.
    OH DEAR GOD !!

    Coming from the "phase plug", "foam basket" and "Wuhan coil" and MW6502 is better than MW6511 guys...

    PRICELESS !!
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  • xschop
    xschop Posts: 5,000
    In short time there will be no good functioning OEM 6511's. You can quote me on that.
    Don't take experimental gene therapies from known eugenicists.
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  • Gardenstater
    Gardenstater Posts: 4,457
    edited April 29
    pitdogg2 wrote: »
    Gardenstater Posts: 4,192
    12:39PM edited 12:41PM
    Reading comprehension needs to go beyond the literal to the intent sometimes. Just because they will fit doesn't mean it will be optimal.
    OH DEAR GOD !!

    Coming from the "phase plug", "foam basket" and "Wuhan coil" and MW6502 is better than MW6511 guys...

    PRICELESS !!

    I guess you don't get the "eyes wide open" concept there Ivan, as in know what you're getting into ie. it may be better and it may not. <whispering into microphone> That's why they call it an experiment.
    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
    · Share on FacebookShare on Twitter
  • pitdogg2
    pitdogg2 Posts: 25,412
    xschop wrote: »
    In short time there will be no good functioning OEM 6511's. You can quote me on that.

    You are correct in that statement. There are now several that a decade were very plentiful. That is not lost on me.
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  • Gardenstater
    Gardenstater Posts: 4,457
    To belabor the point further, you're making what I'd call a faulty analogy because you are equating informing someone that what they "may" be contemplating doing will be an experiment with "possible" negative results and giving them some info. on why, with reporting positive results on an experiment that one has already conducted.
    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
    · Share on FacebookShare on Twitter