Current Production Drivers - Vintage Support

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  • Barry they are there ,you might need a magnifying glass to see the marks but both are marked. I did complain about that and the fact that not everyone in the world knows to trim the butyl rubber around the screw holes and then rips the sheet of the surround. Well they took my complaint and w/ thanks sent me 2 new 6502 driver free and no shipping. I was so pleased that I did call back the supervising guarantee officer Ken to thank him for listening. I am going to try to take a close-up shot which may or may not help . it's that faint. Oh those new drivers are in my Monitor 7s now.0zb7wh2h9aq6.jpg
    e-up of the markings if I don'yt get flash back.fd6prvwne5qw.jpg
    2chl- Adcom GFA- 555-Onkyo P-3150v pre/amp- JVC-QL-A200 tt- Denon 1940 ci cdp- Adcom GFS-6 -Modded '87 SDA 2Bs - Dynamat Ext.- BH-5- X-Overs VR-3, RDO-194 tweeters, Larry's Rings, Speakon/Neutrik I/C- Cherry stain tops Advent Maestros,Ohm model E

    H/T- Toshiba au40" flat- Yamaha RX- V665 avr- YSD-11 Dock- I-Pod- Klipsch #400HD Speaker set-

    Bdrm- Nikko 6065 receiver- JBL -G-200s--Pioneer 305 headphones--Sony CE375-5 disc
  • I notice the gaskets on the driver in the picture should not be trimmed that way at the screw holes they will not seal properly.
    Yamaha RXA1030, Yamaha CD, Bluesound node 2i, Tidal
    Polk SDA2btl highly modded
    Polk SDA 1C
    Polk CS350 LS x2
    Polk m5jr
    Kimber 8TC
    Sony 55" Bravia
    Wish list SVS sub

  • I found the markings on the third speaker I unwrapped! Thanks guys!
    Barry
  • K_MK_M Posts: 1,548
    BarryD wrote: »
    I was thinking of using the MW6503, in a home speaker project. Need about 35hz or lower low cut off so this driver seemed to fit the bill.
    I have seen some used drivers on Ebay and also seen this driver new at some speaker repair sites.
    My first question is:
    Are the new OEM drivers (MW6503) the same quality as the original ones?

    I know that the old ones are now subject to Magnet shift because of the old epoxy.

    Next question:
    Are these parameters correct?

    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

    Thanks in advance.



    esyyd9eghx40.jpg

    Quickly entered given parameters, ended up with an "Ideal" box and tuning, and a "Custom" size and tuning also....

    Kinda tough to truly get a really low cut off with this driver, as you see it either rolls off higher, or to get your -3db point, but with reduced bass over a portion of the range.

    The relatively low Qts is the reason. no matter how big the box, or how low the Fs of the driver, the Qts will determine the low end as to whether it is flat, reduced or peaked looking.

    .40 is ideal to extend the lows truly "low" and anything less (.31) will result in a sag at the bottom end....
    Lsi15, Lsi9, LsiC,Rta11t,M5jr+,M4, SDA SRS 2.3TL, Rti6....Still listing stuff, a work in progress.
    B+W-Sold
    Electro Voice EV-SIX
    Infinity-Sold
    Advent-Now gone
    Yamaha A-S801
    Yamaha RX-V377
    Yamaha RX-A860
    Yamaha RX-A3060
    Harman Kardon Hk-350i
    Harman Kardon Hk-........
    Harman Kardon PM-665
    Harman Kardon HK-775
    Pioneer.......Stereo Receiver

  • ZLTFULZLTFUL Posts: 5,142
    K_M wrote: »
    :#

    So you replied to a post in a thread that hasn't been replied to in 3 years to someone who has 1 post and hasn't visited the forum in 3 years...?

    It is stuff like this that has people mocking you. If you paid attention to detail, maybe people would take you more seriously.

    But I doubt that is going to happen.
    "Some people find it easier to be conceited rather than correct."

    "Unwad those panties and have a good time man. We're all here to help each other, no matter how it might appear." DSkip
  • K_MK_M Posts: 1,548
    edited November 25
    @ZLTFUL

    PM me with your concerns.
    I posted it for a reason, despite the age of the question.









    Lsi15, Lsi9, LsiC,Rta11t,M5jr+,M4, SDA SRS 2.3TL, Rti6....Still listing stuff, a work in progress.
    B+W-Sold
    Electro Voice EV-SIX
    Infinity-Sold
    Advent-Now gone
    Yamaha A-S801
    Yamaha RX-V377
    Yamaha RX-A860
    Yamaha RX-A3060
    Harman Kardon Hk-350i
    Harman Kardon Hk-........
    Harman Kardon PM-665
    Harman Kardon HK-775
    Pioneer.......Stereo Receiver

  • F1nutF1nut Posts: 43,140
    Too funny
    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

  • ZLTFULZLTFUL Posts: 5,142
    K_M wrote: »
    @ZLTFUL

    PM me with your concerns.
    I posted it for a reason, despite the age of the question.

    Attention seeking?
    Mom not hug you enough as a baby?
    Where did the bad man touch you (show us on the doll)?

    Seriously, you sort of hijacked a pinned thread with something that is only vaguely and loosely related to the thread content.

    My only concerns are for your mental health and situational awareness...

    "Some people find it easier to be conceited rather than correct."

    "Unwad those panties and have a good time man. We're all here to help each other, no matter how it might appear." DSkip
  • hauxonhauxon Posts: 138
    I must say that the above comment is simply beneath this forum.

    I used to think of this forum as one of the greatest since the discussion was in general knowledgeable and respectful. I truly love this forum and what it stands for. So I ask all parties to be civilized, let the forum continue to be one of the nicest on the internet.

    Bury you axes!

    Hrannar
    SRS 1.2 TL | SDA 2B Studio TL | NAD M51 preamp/dac | NAD C272 power amp | Chromecast Audio | RoPieee Roon Raspberry Pi endpoint
  • ZLTFULZLTFUL Posts: 5,142
    hauxon wrote: »
    I must say that the above comment is simply beneath this forum.

    I used to think of this forum as one of the greatest since the discussion was in general knowledgeable and respectful. I truly love this forum and what it stands for. So I ask all parties to be civilized, let the forum continue to be one of the nicest on the internet.

    Bury you axes!

    Hrannar

    images?q=tbn:ANd9GcTSBu3FWElZphUB-Fep1Eg7aQqtPArxCPCN8VUt1H5FE1UvqDmh&s
    "Some people find it easier to be conceited rather than correct."

    "Unwad those panties and have a good time man. We're all here to help each other, no matter how it might appear." DSkip
  • nooshinjohnnooshinjohn Posts: 21,607
    Is it snowing where you’re at ZL?
    The Gear... Carver "Statement" Mono-blocks, TriangleArt Reference SE with Pass Labs Xono Phono Preamp, Walker Precision Motor Drive, ClearAudio Goldfinger Diamond v2 cartridge and Origin Conquerer Mk3c tonearm, Polk Audio "Signature" Reference Series 1.2TL with complete mods, Pass Labs X0.2 three chassis preamp, PS Audio PerfectWave DAC MkII, Pioneer Elite SC-LX701, Oppo UDP-205 4K Blu-ray player, Sony XBR70x850B 4k, Polk audio AB700/800 "in-wall" surrounds.

    Saying that it's "too hard" to pursue your dreams is no different than admitting to yourself that you are too lazy to achieve them.

    “If it moves, tax it. If it keeps moving, regulate it. And if it stops moving, subsidize it.”
  • ZLTFULZLTFUL Posts: 5,142
    Is it snowing where you’re at ZL?

    Did a bit over Thanksgiving. Just been cold since.
    "Some people find it easier to be conceited rather than correct."

    "Unwad those panties and have a good time man. We're all here to help each other, no matter how it might appear." DSkip
  • dorokusaidorokusai Posts: 25,488
    The current drivers are much better replacements. I wouldn’t replace anything still working but I wouldn’t bother searching for a direct replacement.
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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