MW6511 / 6503 Anyone Using Modern Replacements - Update ?

I found an older post (2012) on this subject and was wondering if anyone has any more experience with the 6503's?

http://forum.polkaudio.com/discussion/130086/mw6511-6503-anyone-using-modern-replacements

I found an issue on my 1C's that are in the middle of an overhaul.

The left channel has three MW6510's and only one MW6511 !!! (!@#$%&;!!!) Looks like someone replaced a MW6511 in their previous life.

I'm finding the MW6511 are difficult to find, and understand the MW6503 is an exact replacement. True?

@westmassguy does this affect my XO board project?

I wanted to get some feedback on this subject while not getting lost in my current rebuild post:

http://forum.polkaudio.com/discussion/179960/another-1c-upgrade-path#latest

Any and all comments are welcome !!!
Basement: Polk SDA SRS, Micro Seiki MB14 TT, VTL 2.5 Preamplifier, Marantz CD6006 CDP, Conrad Johnson MF2300A Amp, Furman 15PFi Power Conditioner, AQ Diamondback (version 1) RCA IC's, MIT Terminator2 Bi-Wire speaker cables
Office: PC, Marantz CD-1, Marantz AMP-1, Acoustic Technologies Classic Speakers, Polk PSWi225 wireless sub, MIT AVt2 speaker cables, IFI Purifier2, AQ Cinnamon USB cable
Spare Room: Dayens Ampino Integrated, Project BoxE, Polk TSi200's
Living Room: Pioneer SX-N30 Network Receiver, Pioneer PD10AE CD Player, Furman M8-LX Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi Subwoofer
«13

Comments

  • westmassguywestmassguy Posts: 6,171
    edited December 2017
    The 6511 is 4 ohm, the 6510s are 8 ohms. You can either look on fleaBay for a salvaged 6511, or order the new replacement from Polk Customer Service.
    It must be the MW6511, no other driver can be used.
    Home Theater/2 Channel:
    Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
    Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
    Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
    Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
    Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
    Cables: Speaker: Furez 10/2 with GLS Locking Banana Plugs
    Interconnect: Furez 10/2 with SpeakONs
    ICs: Custom Furez by Douglas Connections
    Den:
    Bose 901 Series II Continentals Restored, Re-Built Equalizer with Elna Silmic IIs, Sonicaps, and Silver Mica Caps
    Carver CT-3 Pre, Carver C-500

    dhsspeakerservice.com/
    Exclusive Distributor of Gimpod's Custom SDA Circuit Boards

    "And keep her under 70, would you, huh? Betty likes a slow ride"
  • Mike ReeterMike Reeter Posts: 3,316
    I recently picked up a very nice MW6511 off eBay, do a Saved Search, they do do come up for sale every so often.
    SDA SRS 2.3TL's/SDA SRS 3.1TL's/SDA CRS+4.1TL's and some other stuff
  • verbverb Posts: 4,001
    So I called Polk today about a replacement for the MW6511. They told me that they now have a direct replacement:

    RD6110-1 (confirmed 4ohm)

    However, the guy said that he recommends replacing them in pairs on my 1C due to the fact that they sound "a little different" than the MW6511's ?!?!?!

    Does that sound right? No pun intended :smile:

    Anyone have experience with the RD6110-1's ???

    Thanks.
    Basement: Polk SDA SRS, Micro Seiki MB14 TT, VTL 2.5 Preamplifier, Marantz CD6006 CDP, Conrad Johnson MF2300A Amp, Furman 15PFi Power Conditioner, AQ Diamondback (version 1) RCA IC's, MIT Terminator2 Bi-Wire speaker cables
    Office: PC, Marantz CD-1, Marantz AMP-1, Acoustic Technologies Classic Speakers, Polk PSWi225 wireless sub, MIT AVt2 speaker cables, IFI Purifier2, AQ Cinnamon USB cable
    Spare Room: Dayens Ampino Integrated, Project BoxE, Polk TSi200's
    Living Room: Pioneer SX-N30 Network Receiver, Pioneer PD10AE CD Player, Furman M8-LX Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi Subwoofer
  • westmassguywestmassguy Posts: 6,171
    He's correct. They do blend well, but Doing mirror pairs is always better. Either two older 6511s, or two replacements.
    Home Theater/2 Channel:
    Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
    Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
    Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
    Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
    Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
    Cables: Speaker: Furez 10/2 with GLS Locking Banana Plugs
    Interconnect: Furez 10/2 with SpeakONs
    ICs: Custom Furez by Douglas Connections
    Den:
    Bose 901 Series II Continentals Restored, Re-Built Equalizer with Elna Silmic IIs, Sonicaps, and Silver Mica Caps
    Carver CT-3 Pre, Carver C-500

    dhsspeakerservice.com/
    Exclusive Distributor of Gimpod's Custom SDA Circuit Boards

    "And keep her under 70, would you, huh? Betty likes a slow ride"
  • verbverb Posts: 4,001
    Thanks David. Always appreciate your prompt replies. So I bought 4 new MW’s !!!

    List was $71 each but with CP discount and further haggling got em for $48 each with free shipping.

    They’re on the way !!!
    Basement: Polk SDA SRS, Micro Seiki MB14 TT, VTL 2.5 Preamplifier, Marantz CD6006 CDP, Conrad Johnson MF2300A Amp, Furman 15PFi Power Conditioner, AQ Diamondback (version 1) RCA IC's, MIT Terminator2 Bi-Wire speaker cables
    Office: PC, Marantz CD-1, Marantz AMP-1, Acoustic Technologies Classic Speakers, Polk PSWi225 wireless sub, MIT AVt2 speaker cables, IFI Purifier2, AQ Cinnamon USB cable
    Spare Room: Dayens Ampino Integrated, Project BoxE, Polk TSi200's
    Living Room: Pioneer SX-N30 Network Receiver, Pioneer PD10AE CD Player, Furman M8-LX Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi Subwoofer
  • verbverb Posts: 4,001
    Yeah !!! My new MW's arrived today from Polk. Was all little worried as they came with no individual boxes, only in bubble wrap !!! WTF? After opening one I was relieved that they at least had a plastic shipping cover on the cone side.
    bq69ryqm2l9j.jpg
    Weird that the cover was hand cut. Most likely warehouse storage trays of some sort. No boxes though !!! Gotta check for magnet shifting !!!
    y3ysbw764ngm.jpg
    Another interesting thing is the part number. Polk claims that these are the RD6110-1's, but as you can see clearly it is marked MW6511. And another number RD6511.
    Anyone else have this experience?
    Are they RD6110's or MW6511's ???
    Basement: Polk SDA SRS, Micro Seiki MB14 TT, VTL 2.5 Preamplifier, Marantz CD6006 CDP, Conrad Johnson MF2300A Amp, Furman 15PFi Power Conditioner, AQ Diamondback (version 1) RCA IC's, MIT Terminator2 Bi-Wire speaker cables
    Office: PC, Marantz CD-1, Marantz AMP-1, Acoustic Technologies Classic Speakers, Polk PSWi225 wireless sub, MIT AVt2 speaker cables, IFI Purifier2, AQ Cinnamon USB cable
    Spare Room: Dayens Ampino Integrated, Project BoxE, Polk TSi200's
    Living Room: Pioneer SX-N30 Network Receiver, Pioneer PD10AE CD Player, Furman M8-LX Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi Subwoofer
  • verbverb Posts: 4,001
    Cone side of MW below:
    w4ezekpfaxps.jpg
    Basement: Polk SDA SRS, Micro Seiki MB14 TT, VTL 2.5 Preamplifier, Marantz CD6006 CDP, Conrad Johnson MF2300A Amp, Furman 15PFi Power Conditioner, AQ Diamondback (version 1) RCA IC's, MIT Terminator2 Bi-Wire speaker cables
    Office: PC, Marantz CD-1, Marantz AMP-1, Acoustic Technologies Classic Speakers, Polk PSWi225 wireless sub, MIT AVt2 speaker cables, IFI Purifier2, AQ Cinnamon USB cable
    Spare Room: Dayens Ampino Integrated, Project BoxE, Polk TSi200's
    Living Room: Pioneer SX-N30 Network Receiver, Pioneer PD10AE CD Player, Furman M8-LX Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi Subwoofer
  • verbverb Posts: 4,001
    Magnet side. Everything is good on all 4 MW's. Interesting looks like the seal has been replaced with an open cell foam:
    avinu8vlgecc.jpg
    Basement: Polk SDA SRS, Micro Seiki MB14 TT, VTL 2.5 Preamplifier, Marantz CD6006 CDP, Conrad Johnson MF2300A Amp, Furman 15PFi Power Conditioner, AQ Diamondback (version 1) RCA IC's, MIT Terminator2 Bi-Wire speaker cables
    Office: PC, Marantz CD-1, Marantz AMP-1, Acoustic Technologies Classic Speakers, Polk PSWi225 wireless sub, MIT AVt2 speaker cables, IFI Purifier2, AQ Cinnamon USB cable
    Spare Room: Dayens Ampino Integrated, Project BoxE, Polk TSi200's
    Living Room: Pioneer SX-N30 Network Receiver, Pioneer PD10AE CD Player, Furman M8-LX Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi Subwoofer
  • aprazer402aprazer402 Posts: 1,173
    verb wrote: »
    Yeah !!! My new MW's arrived today from Polk. Was all little worried as they came with no individual boxes, only in bubble wrap !!! WTF? After opening one I was relieved that they at least had a plastic shipping cover on the cone side.
    bq69ryqm2l9j.jpg
    Weird that the cover was hand cut. Most likely warehouse storage trays of some sort. No boxes though !!! Gotta check for magnet shifting !!!
    y3ysbw764ngm.jpg
    Another interesting thing is the part number. Polk claims that these are the RD6110-1's, but as you can see clearly it is marked MW6511. And another number RD6511.
    Anyone else have this experience?
    Are they RD6110's or MW6511's ???

    I would speculate the RD6110-1 and RD6511 are some sort of stock or ordering number, where the MW6511 is what we consider the model number.

    Also, is the forum collective recommending these new MW's have glue added around their magnets?
  • westmassguywestmassguy Posts: 6,171
    No glue on the magnets is required on the new woofers. You'll need to trim the rubber surround where it overlaps the mounting holes, otherwise, you'll pull and tear the rubber tightening the screws.
    Home Theater/2 Channel:
    Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
    Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
    Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
    Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
    Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
    Cables: Speaker: Furez 10/2 with GLS Locking Banana Plugs
    Interconnect: Furez 10/2 with SpeakONs
    ICs: Custom Furez by Douglas Connections
    Den:
    Bose 901 Series II Continentals Restored, Re-Built Equalizer with Elna Silmic IIs, Sonicaps, and Silver Mica Caps
    Carver CT-3 Pre, Carver C-500

    dhsspeakerservice.com/
    Exclusive Distributor of Gimpod's Custom SDA Circuit Boards

    "And keep her under 70, would you, huh? Betty likes a slow ride"
  • verbverb Posts: 4,001
    No glue on the magnets is required on the new woofers. You'll need to trim the rubber surround where it overlaps the mounting holes, otherwise, you'll pull and tear the rubber tightening the screws.

    Thanks Dave - I noticed the rubber overlaps. You have answered my question not yet asked !!!
    Basement: Polk SDA SRS, Micro Seiki MB14 TT, VTL 2.5 Preamplifier, Marantz CD6006 CDP, Conrad Johnson MF2300A Amp, Furman 15PFi Power Conditioner, AQ Diamondback (version 1) RCA IC's, MIT Terminator2 Bi-Wire speaker cables
    Office: PC, Marantz CD-1, Marantz AMP-1, Acoustic Technologies Classic Speakers, Polk PSWi225 wireless sub, MIT AVt2 speaker cables, IFI Purifier2, AQ Cinnamon USB cable
    Spare Room: Dayens Ampino Integrated, Project BoxE, Polk TSi200's
    Living Room: Pioneer SX-N30 Network Receiver, Pioneer PD10AE CD Player, Furman M8-LX Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi Subwoofer
  • westmassguywestmassguy Posts: 6,171
    Be very carful cutting!
    Home Theater/2 Channel:
    Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
    Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
    Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
    Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
    Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
    Cables: Speaker: Furez 10/2 with GLS Locking Banana Plugs
    Interconnect: Furez 10/2 with SpeakONs
    ICs: Custom Furez by Douglas Connections
    Den:
    Bose 901 Series II Continentals Restored, Re-Built Equalizer with Elna Silmic IIs, Sonicaps, and Silver Mica Caps
    Carver CT-3 Pre, Carver C-500

    dhsspeakerservice.com/
    Exclusive Distributor of Gimpod's Custom SDA Circuit Boards

    "And keep her under 70, would you, huh? Betty likes a slow ride"
  • verbverb Posts: 4,001
    Be very carful cutting!

    Yep. Plan to use an X-acto knife. New blade.
    Basement: Polk SDA SRS, Micro Seiki MB14 TT, VTL 2.5 Preamplifier, Marantz CD6006 CDP, Conrad Johnson MF2300A Amp, Furman 15PFi Power Conditioner, AQ Diamondback (version 1) RCA IC's, MIT Terminator2 Bi-Wire speaker cables
    Office: PC, Marantz CD-1, Marantz AMP-1, Acoustic Technologies Classic Speakers, Polk PSWi225 wireless sub, MIT AVt2 speaker cables, IFI Purifier2, AQ Cinnamon USB cable
    Spare Room: Dayens Ampino Integrated, Project BoxE, Polk TSi200's
    Living Room: Pioneer SX-N30 Network Receiver, Pioneer PD10AE CD Player, Furman M8-LX Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi Subwoofer
  • xschopxschop Posts: 875
    Looks like they took notice of my no-nipple mod hehe.
  • pitdogg2pitdogg2 Posts: 11,467
    xschop wrote: »
    Looks like they took notice of my no-nipple mod hehe.

    If you are talking VC leads that happened way before you were here.
    I have a 1994 mw6501 that way
  • F1nutF1nut Posts: 40,627
    Interesting looks like the seal has been replaced with an open cell foam

    Once screwed down it won't be open any longer.
    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."


  • xschopxschop Posts: 875
    pitdogg2 wrote: »
    xschop wrote: »
    Looks like they took notice of my no-nipple mod hehe.

    If you are talking VC leads that happened way before you were here.
    I have a 1994 mw6501 that way

    I was referring to the extra stamped steel basket nipples, but I clipped those extra lead tabs as well and bent the mount further out of the air-flow path.
  • verbverb Posts: 4,001
    xschop wrote: »
    pitdogg2 wrote: »
    xschop wrote: »
    Looks like they took notice of my no-nipple mod hehe.

    If you are talking VC leads that happened way before you were here.
    I have a 1994 mw6501 that way

    I was referring to the extra stamped steel basket nipples, but I clipped those extra lead tabs as well and bent the mount further out of the air-flow path.

    There's only one now on these babies (if that is what you are referring to):
    jtwefk3450qg.jpg
    Basement: Polk SDA SRS, Micro Seiki MB14 TT, VTL 2.5 Preamplifier, Marantz CD6006 CDP, Conrad Johnson MF2300A Amp, Furman 15PFi Power Conditioner, AQ Diamondback (version 1) RCA IC's, MIT Terminator2 Bi-Wire speaker cables
    Office: PC, Marantz CD-1, Marantz AMP-1, Acoustic Technologies Classic Speakers, Polk PSWi225 wireless sub, MIT AVt2 speaker cables, IFI Purifier2, AQ Cinnamon USB cable
    Spare Room: Dayens Ampino Integrated, Project BoxE, Polk TSi200's
    Living Room: Pioneer SX-N30 Network Receiver, Pioneer PD10AE CD Player, Furman M8-LX Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi Subwoofer
  • verbverb Posts: 4,001
    Another interesting thing I noticed it that the frame looks to be much stiffer than the original.
    They changed the cross section of the frame legs to include a structural channel.
    In engineer vernacular, a hat section. Much stiffer than the previous "flat" design.
    Also the magnet interface profile adds a "L" shape to it.
    All structural goodness.
    007uly25416y.jpg
    Taken from one of the many venerable @F1nut posts for comparison. Flat sections at the legs and magnet interface.
    dkom35v8zul3.png

    Basement: Polk SDA SRS, Micro Seiki MB14 TT, VTL 2.5 Preamplifier, Marantz CD6006 CDP, Conrad Johnson MF2300A Amp, Furman 15PFi Power Conditioner, AQ Diamondback (version 1) RCA IC's, MIT Terminator2 Bi-Wire speaker cables
    Office: PC, Marantz CD-1, Marantz AMP-1, Acoustic Technologies Classic Speakers, Polk PSWi225 wireless sub, MIT AVt2 speaker cables, IFI Purifier2, AQ Cinnamon USB cable
    Spare Room: Dayens Ampino Integrated, Project BoxE, Polk TSi200's
    Living Room: Pioneer SX-N30 Network Receiver, Pioneer PD10AE CD Player, Furman M8-LX Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi Subwoofer
  • pitdogg2pitdogg2 Posts: 11,467
    Nice.
  • audioluvraudioluvr Posts: 495
    verb wrote: »
    Yeah !!! My new MW's arrived today from Polk....

    And how do they sound? Any discernable difference? Do tell!
    Home System:
    SDA 1C's - Full mod with the help by Dave...
    B&K Reference 50 Pre
    B&K M200 Sonata Monoblocks
    Cambridge Audio DVD 99
    Sangean HD FM Tuner

    Barn system:
    SDA SRS 2.3's Full mod done by myself
    Carver C-1 pre
    Carver M1.5t
  • verbverb Posts: 4,001
    audioluvr wrote: »
    verb wrote: »
    Yeah !!! My new MW's arrived today from Polk....

    And how do they sound? Any discernable difference? Do tell!

    Haven't finish the build, yet, but can't wait !!! Others on this thread including @westmassguy have opined that they are good replacements, but do sound a little different. He recommended matched pairs, but I went ahead a bought all 4. Got em from Polk $48/each including shipping.

    Got my 2B's running in the meantime.
    Basement: Polk SDA SRS, Micro Seiki MB14 TT, VTL 2.5 Preamplifier, Marantz CD6006 CDP, Conrad Johnson MF2300A Amp, Furman 15PFi Power Conditioner, AQ Diamondback (version 1) RCA IC's, MIT Terminator2 Bi-Wire speaker cables
    Office: PC, Marantz CD-1, Marantz AMP-1, Acoustic Technologies Classic Speakers, Polk PSWi225 wireless sub, MIT AVt2 speaker cables, IFI Purifier2, AQ Cinnamon USB cable
    Spare Room: Dayens Ampino Integrated, Project BoxE, Polk TSi200's
    Living Room: Pioneer SX-N30 Network Receiver, Pioneer PD10AE CD Player, Furman M8-LX Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi Subwoofer
  • verbverb Posts: 4,001
    I recently picked up a very nice MW6511 off eBay, do a Saved Search, they do do come up for sale every so often.

    Scored a pair of MW6511's on fleabay. Saved search worked great. Bought em after being listed for less than an hour. Now I got some spares. Thanks Mike.
    Basement: Polk SDA SRS, Micro Seiki MB14 TT, VTL 2.5 Preamplifier, Marantz CD6006 CDP, Conrad Johnson MF2300A Amp, Furman 15PFi Power Conditioner, AQ Diamondback (version 1) RCA IC's, MIT Terminator2 Bi-Wire speaker cables
    Office: PC, Marantz CD-1, Marantz AMP-1, Acoustic Technologies Classic Speakers, Polk PSWi225 wireless sub, MIT AVt2 speaker cables, IFI Purifier2, AQ Cinnamon USB cable
    Spare Room: Dayens Ampino Integrated, Project BoxE, Polk TSi200's
    Living Room: Pioneer SX-N30 Network Receiver, Pioneer PD10AE CD Player, Furman M8-LX Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi Subwoofer
  • xschopxschop Posts: 875
    If you are able, can you do a comparison between new vs. old 6511 in low freq reproduction? From my experience the older 6511's have too much excursion.
  • verbverb Posts: 4,001
    xschop wrote: »
    If you are able, can you do a comparison between new vs. old 6511 in low freq reproduction? From my experience the older 6511's have too much excursion.

    Everything's in pieces as I'm doing a complete rebuild right now. @westmassguy is doing the XO's and everything else.

    David - You had mentioned there are differences between the original 6511's vs. the modern replacements, as you recommending replacing them in matched pairs. Can you elaborate? Thanks!!!
    Basement: Polk SDA SRS, Micro Seiki MB14 TT, VTL 2.5 Preamplifier, Marantz CD6006 CDP, Conrad Johnson MF2300A Amp, Furman 15PFi Power Conditioner, AQ Diamondback (version 1) RCA IC's, MIT Terminator2 Bi-Wire speaker cables
    Office: PC, Marantz CD-1, Marantz AMP-1, Acoustic Technologies Classic Speakers, Polk PSWi225 wireless sub, MIT AVt2 speaker cables, IFI Purifier2, AQ Cinnamon USB cable
    Spare Room: Dayens Ampino Integrated, Project BoxE, Polk TSi200's
    Living Room: Pioneer SX-N30 Network Receiver, Pioneer PD10AE CD Player, Furman M8-LX Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi Subwoofer
  • westmassguywestmassguy Posts: 6,171
    verb wrote: »
    xschop wrote: »
    If you are able, can you do a comparison between new vs. old 6511 in low freq reproduction? From my experience the older 6511's have too much excursion.

    Everything's in pieces as I'm doing a complete rebuild right now. @westmassguy is doing the XO's and everything else.

    David - You had mentioned there are differences between the original 6511's vs. the modern replacements, as you recommending replacing them in matched pairs. Can you elaborate? Thanks!!!
    They may, I repeat, may sound slightly different, which is why I always advise doing them in mirrored pairs. If you original woofers are very old, or were heavily used, their suspensions will be worn. The new woofers will not be worn, and will go through a mechanical break-in.
    Home Theater/2 Channel:
    Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
    Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
    Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
    Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
    Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
    Cables: Speaker: Furez 10/2 with GLS Locking Banana Plugs
    Interconnect: Furez 10/2 with SpeakONs
    ICs: Custom Furez by Douglas Connections
    Den:
    Bose 901 Series II Continentals Restored, Re-Built Equalizer with Elna Silmic IIs, Sonicaps, and Silver Mica Caps
    Carver CT-3 Pre, Carver C-500

    dhsspeakerservice.com/
    Exclusive Distributor of Gimpod's Custom SDA Circuit Boards

    "And keep her under 70, would you, huh? Betty likes a slow ride"
  • headrottheadrott Posts: 5,348
    edited February 15
    xschop wrote: »
    If you are able, can you do a comparison between new vs. old 6511 in low freq reproduction? From my experience the older 6511's have too much excursion.

    Kinda late to the game, but in the experience I had with the one MW6511 driver I purchased from Polk verses the original MW6511's I had the driver "bottoming out" (i.e being overloaded) compared to the original MW6511's. The replacement driver I purchased was about 8 or 9 years ago now so things might be different in the last few years. That was my experience, however.
    Relayer-Big-O-Poster.jpg
    Taken from a recent Audioholics reply regarding "Club Polk" and Polk speakers:

    "I'm yet to hear a Polk speaker that merits more than a sentence and 60 seconds discussion." :\

    "Green leaves reveal the heart spoken Khatru"- Jon Anderson

    "Have A Little Faith! And Everything You'll Face, Will Jump From Out Right On Into Place! Yeah! Take A Little Time! And Everything You'll Find, Will Move From Gloom Right On Into Shine!"- Arthur Lee
  • verbverb Posts: 4,001
    headrott wrote: »
    xschop wrote: »
    If you are able, can you do a comparison between new vs. old 6511 in low freq reproduction? From my experience the older 6511's have too much excursion.

    Kinda late to the game, but in the experience I had with the one MW6511 driver I purchased from Polk verses the original MW6511's I had the driver "bottoming out" (i.e being overloaded) compared to the original MW6511's. The replacement driver I purchased was about 8 or 9 years ago now so things might be different in the last few years. That was my experience, however.

    Thanks for the insight! I'll keep a lookout!
    Basement: Polk SDA SRS, Micro Seiki MB14 TT, VTL 2.5 Preamplifier, Marantz CD6006 CDP, Conrad Johnson MF2300A Amp, Furman 15PFi Power Conditioner, AQ Diamondback (version 1) RCA IC's, MIT Terminator2 Bi-Wire speaker cables
    Office: PC, Marantz CD-1, Marantz AMP-1, Acoustic Technologies Classic Speakers, Polk PSWi225 wireless sub, MIT AVt2 speaker cables, IFI Purifier2, AQ Cinnamon USB cable
    Spare Room: Dayens Ampino Integrated, Project BoxE, Polk TSi200's
    Living Room: Pioneer SX-N30 Network Receiver, Pioneer PD10AE CD Player, Furman M8-LX Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi Subwoofer
  • Viking64Viking64 Posts: 3,605
    verb wrote: »
    I'll keep a lookout!
    I didn't keep mine, but I ordered one on eBay! :p

    vzj9jqzg2o4s.jpg

  • verbverb Posts: 4,001
    edited February 16
    Good to see your library is replete with the classics! :smiley:

    Edited for grammatical, punctuation, and syntax errors!
    Basement: Polk SDA SRS, Micro Seiki MB14 TT, VTL 2.5 Preamplifier, Marantz CD6006 CDP, Conrad Johnson MF2300A Amp, Furman 15PFi Power Conditioner, AQ Diamondback (version 1) RCA IC's, MIT Terminator2 Bi-Wire speaker cables
    Office: PC, Marantz CD-1, Marantz AMP-1, Acoustic Technologies Classic Speakers, Polk PSWi225 wireless sub, MIT AVt2 speaker cables, IFI Purifier2, AQ Cinnamon USB cable
    Spare Room: Dayens Ampino Integrated, Project BoxE, Polk TSi200's
    Living Room: Pioneer SX-N30 Network Receiver, Pioneer PD10AE CD Player, Furman M8-LX Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi Subwoofer
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