My first real speakers

Hello everyone,

I've just picked up a pair of monitors from Craigslist for the sweet irresistible price of 25 dollars. Can you help me identify them? It seems the tweeters are SL2500, based on the label on the back.

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I'd also appreciate any advice you could give in regards to refurbishing and repairing them. One of them only operates from the tweeter, though there is some vibration in the other two speakers. Probably due to a bad capacitor.

Thanks!
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Comments

  • mlistens03mlistens03 Posts: 2,134
    I think those are Monitor 5’s.
    The magnet in the speaker that doesn’t play has probably slipped (google, and you’ll find that it’s a very common issue), so the first thing I would do I say pull the other driver and put glue (don’t remember which kind is recommended by most here) around the magnets so it doesn’t slip. Then, go and gently push on both sides of the cone with your thumb, and see if it moves easily. If it doesn’t immediately move, then don’t force it, and hopefully someone else will chime in on how to fix it.

    Also, the big driver on the bottom is a passive radiator, in case you didn’t already know. The only active drivers in these speakers are the tweeter and midwoofer, the bottom only is pushed by the air of the midwoofer.
    Not Tom, or Trey, or Jim
    NAD C352
    Monitor Audio Radius R90’s/Mission Freedom 770 IV
    BJC speaker cables, generic RCA’s, one homemade power cable, because that’s going to do any good with the rest of the generic ones.
    Technics SL3200 turntable and a Shure M97xE phono cartridge
    Velodyne VA-907 subwoofer
    Lafayette LR-1100 acting as a tuner and phono.
    I've always thought the goal of high end audio was not to have your neighbors bang on the wall and say, 'Turn that darn music down' but to have your neighbors bang on the wall and say, 'Tell your friends to go home and you can practice later this week'.
  • mlistens03mlistens03 Posts: 2,134
    Almost forgot to mention, welcome to Club Polk!!
    Not Tom, or Trey, or Jim
    NAD C352
    Monitor Audio Radius R90’s/Mission Freedom 770 IV
    BJC speaker cables, generic RCA’s, one homemade power cable, because that’s going to do any good with the rest of the generic ones.
    Technics SL3200 turntable and a Shure M97xE phono cartridge
    Velodyne VA-907 subwoofer
    Lafayette LR-1100 acting as a tuner and phono.
    I've always thought the goal of high end audio was not to have your neighbors bang on the wall and say, 'Turn that darn music down' but to have your neighbors bang on the wall and say, 'Tell your friends to go home and you can practice later this week'.
  • F1nutF1nut Posts: 40,378
    Monitor 5 Series 2.

    The mid-driver's magnet has slipped. Tough to repair. You should be able to find a replacement on eBay.
    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."


  • la2vegasla2vegas Posts: 2,799
    F1nut wrote: »
    Monitor 5 Series 2.

    The mid-driver's magnet has slipped. Tough to repair. You should be able to find a replacement on eBay.

    Or you can get in contact with @lawdogg, he's a member here that will fix it for you free of charge. You'll just have to pay for shipping both ways. Easy peasy.
    2.3TL, 3.1TL, SDA 2B, SDA II, 7B, 7C, 7 series 2, 10B, 5JR+, 5JR, 5A, 4.5, 4, RTA 11T X2 pairs, RTA 8T, LSI9, LSI7, RTI A7, RTI A3, CSI A4, CSI A6, F/XI A4, RTI4. That's all for now.
  • xschopxschop Posts: 866
    Your first pic is the passive radiator.
  • la2vegasla2vegas Posts: 2,799
    That's good to know @FestYboy.
    2.3TL, 3.1TL, SDA 2B, SDA II, 7B, 7C, 7 series 2, 10B, 5JR+, 5JR, 5A, 4.5, 4, RTA 11T X2 pairs, RTA 8T, LSI9, LSI7, RTI A7, RTI A3, CSI A4, CSI A6, F/XI A4, RTI4. That's all for now.
  • cyrialcyrial Posts: 10
    Thanks for the welcome everyone! The non-operational driver cone is wobbly and loose. So this is due to a slipped magnet? Can anyone help me understand more? I'd like to attempt the repair myself, if that's feasible.
  • verbverb Posts: 3,328
    FestYboy wrote: »
    I can do the same if @lawdogg is unable, and for the same deal.

    I haven't made this public knowledge only due to the fact that I only obtained my weekends last Sunday. But I officially have some free time to help the community now.

    Very nice gesture sir!
    Basement: Polk SDA SRS, Micro Seiki MB14 TT, VTL 2.5 Pre, Marantz CD6006 CDP, Conrad Johnson MF2300A Amp, Furman 15PFi Power Conditioner, AQ Diamondback (version 1) RCA IC's, MIT Terminator2 Cables
    Office: PC, Marantz AMP-1, Acoustic Technologies Classic Speakers, Polk PSWi225 wireless sub, MIT AVt2 cables, IFI Purifier2, AQ Cinnamon USB cable
    Spare Room: Dayens Ampino Integrated, Auris BluMe, 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
  • cyrialcyrial Posts: 10
    Should the cone be firmly connected to the voice coil? I suspect there is something more wrong here. The dust cap is effectively destroyed, so I just pulled off the crumbling bits.
  • cyrialcyrial Posts: 10
    Sorry for the double post, somehow I don't have editing permissions on my last post.
    wcu19rnnd0ey.jpg
    As you can see, the voice coil has totally burned away from the spider and the cone. The dust cap just crumbled away when I touched it. Is this repairable, or should I just search for a replacement driver?
  • nooshinjohnnooshinjohn Posts: 18,220
    A replacement will be your best bet IMHO...
    The Gear... Carver "Statement" Mono-blocks, TriangleArt Reference SE with PS Audio NuWave Phono converter, Walker Precision Motor Drive, ClearAudio Stradivari v2 cartridge and Origin Conquerer Mk3c tonearm, Polk Audio "Signature" Reference Series 1.2TL with complete mods, Pass Labs X1 two channel preamplifier Signed by Poppa himself, PS Audio PerfectWave DAC MkII, Krell Evolution 525a CD Player, Pioneer Elite SC-65, Oppo UDP-205 Blu-ray , Sony XBR70x850B 4k, Polk audio AB700/800 "in-wall" surrounds

  • mlistens03mlistens03 Posts: 2,134
    Woah, never seen anything like that for a Polk driver.
    Find a used replacement on eBay or something, and maybe try to fix that one as a spare?
    Did you use a multimeter to test the resistance?
    Not Tom, or Trey, or Jim
    NAD C352
    Monitor Audio Radius R90’s/Mission Freedom 770 IV
    BJC speaker cables, generic RCA’s, one homemade power cable, because that’s going to do any good with the rest of the generic ones.
    Technics SL3200 turntable and a Shure M97xE phono cartridge
    Velodyne VA-907 subwoofer
    Lafayette LR-1100 acting as a tuner and phono.
    I've always thought the goal of high end audio was not to have your neighbors bang on the wall and say, 'Turn that darn music down' but to have your neighbors bang on the wall and say, 'Tell your friends to go home and you can practice later this week'.
  • cyrialcyrial Posts: 10
    I've got 0.3 ohms across the terminals. How on earth would I even go about repairing this? The cone might be usable but the spider seems fubar. Are replacement parts available?
  • mlistens03mlistens03 Posts: 2,134
    cyrial wrote: »
    I've got 0.3 ohms across the terminals. How on earth would I even go about repairing this? The cone might be usable but the spider seems fubar. Are replacement parts available?

    If it’s reads 0.3 ohms, you’re toast. The driver is garbage, although don’t toss it in case a magnet slips on another speaker, and during repair it is dropped and it cracks or something. Or maybe I’m preparing you for something that’ll never happen.
    Once you get these working, you will quickly find yourself sucked into the rabbit hole, destined for the rest of your life to be hunting for deals on Craigslist and at garage sales, and endlessly tweaking and testing and tweaking again. :wink:
    Not Tom, or Trey, or Jim
    NAD C352
    Monitor Audio Radius R90’s/Mission Freedom 770 IV
    BJC speaker cables, generic RCA’s, one homemade power cable, because that’s going to do any good with the rest of the generic ones.
    Technics SL3200 turntable and a Shure M97xE phono cartridge
    Velodyne VA-907 subwoofer
    Lafayette LR-1100 acting as a tuner and phono.
    I've always thought the goal of high end audio was not to have your neighbors bang on the wall and say, 'Turn that darn music down' but to have your neighbors bang on the wall and say, 'Tell your friends to go home and you can practice later this week'.
  • cyrialcyrial Posts: 10
    I fear I'm already down the rabbit hole, and this is merely the latest branch of the tunnel
  • With that much damage to a driver I would check everything electronic very carefully. Including replacing the caps and resistors, almost looks like that burned driver was hit with Direct Current.
    Yamaha RXA1030, Yamaha CD
    Polk SDA2btl highly modded
    Polk SDA 1C
    Polk CS350 LS x2
    Polk m5jr
    Kimber 8TC
    Sony 55" Bravia
    Wish list SVS sub

  • westmassguywestmassguy Posts: 6,116
    Driver is toast. MW6502s are plentiful on fleabay. Just make sure the seller wraps it properly to prevent damage during shipping
    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"
  • cyrialcyrial Posts: 10
    Thanks for the model number @westmassguy
  • lawdogglawdogg Posts: 287
    edited September 6
    Bummer! Yes used drivers are plentiful. In fact, I have a re-centered and epoxied 6502 right here that you're welcome to if you can cover shipping. Even the dust cap has never been pushed in. :smiley:
    <3 my 3.1TLs

    I will fix your shifted magnets for free. :)
  • cyrialcyrial Posts: 10
    It's my lucky day! Do you do this for fun, lawdogg? I'm not sure how to send messages on this forum, but I certainly am interested. Thank you :)
  • nooshinjohnnooshinjohn Posts: 18,220
    lawdogg wrote: »
    Bummer! Yes used drivers are plentiful. In fact, I have a re-centered and epoxied 6502 right here that you're welcome to if you can cover shipping. Even the dust cap has never been pushed in. :smiley:

    Club Polk.... it’s how we roll. Good on you Lawdogg.
    The Gear... Carver "Statement" Mono-blocks, TriangleArt Reference SE with PS Audio NuWave Phono converter, Walker Precision Motor Drive, ClearAudio Stradivari v2 cartridge and Origin Conquerer Mk3c tonearm, Polk Audio "Signature" Reference Series 1.2TL with complete mods, Pass Labs X1 two channel preamplifier Signed by Poppa himself, PS Audio PerfectWave DAC MkII, Krell Evolution 525a CD Player, Pioneer Elite SC-65, Oppo UDP-205 Blu-ray , Sony XBR70x850B 4k, Polk audio AB700/800 "in-wall" surrounds

  • lawdogglawdogg Posts: 287
    cyrial wrote: »
    It's my lucky day! Do you do this for fun, lawdogg? I'm not sure how to send messages on this forum, but I certainly am interested. Thank you :)

    Yep just for fun and to help people out who need it! I'll send you a message about the shipping.
    <3 my 3.1TLs

    I will fix your shifted magnets for free. :)
  • mhardy6647mhardy6647 Posts: 19,025
    tonyb wrote: »
    Very nice of you Lawdogg, you get the club Polk smiley sticker today . :)
    I think there's a button and a trophy for that.
    Seriously, way to go man.
    Indeed! Hear, hear! :)

  • lawdogglawdogg Posts: 287
    mhardy6647 wrote: »
    I think there's a button and a trophy for that.

    Nothing will ever top the cookie I got from Jesse. :blush:
    <3 my 3.1TLs

    I will fix your shifted magnets for free. :)
  • F1nutF1nut Posts: 40,378
    That made me burst out laughing :D
    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."


  • lawdogglawdogg Posts: 287
    Well his driver's en route so hopefully we get some good news from him on Monday!
    <3 my 3.1TLs

    I will fix your shifted magnets for free. :)
  • cyrialcyrial Posts: 10
    Woohoo! I'll be sure to let you all know just how good it sounds. These speakers are awesome, without so much bass that I disturb the neighbors. Gonna be great for doing homework...
  • westmassguywestmassguy Posts: 6,116
    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"
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