Monitor 5 Midrange

canadianicon25
canadianicon25 Posts: 200
edited July 2010 in Vintage Speakers
Hello all,

I need to replace the midrange drivers in a pair of Monitor 5. Can anyone suggest a good alternative to actual Polk product if i am not able to find any?

Any suggestions would be great.
Post edited by canadianicon25 on
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Comments

  • Bobsama
    Bobsama Posts: 526
    edited July 2010
    The original is pretty darn common. Try looking for it first; MW6502.
    polkaudio Monitor 5 Series II
    polkaudio SDA-1 (with the SL1000)
    TEAC AG-H300 MK III stereo receiver
    beyerdynamic DT-880 Premium (600 Ω) headphones
    SENNHEISER HD-555 headphones
    Little Dot MK IV tube headphone amp
    Little Dot DAC_I balanced D/A converter
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  • jrgoswick
    jrgoswick Posts: 159
    edited July 2010
    Why would you put a non-Polk spec driver in it? It would wreak havoc with the XO and ultimately your sound(unless you change the XO and do BOTH speakers). I'd take Bobsama's advice, try to find another one. Worst case scenario, order a NEW one from Polk CS(they're uber nice and hella quick to get it to you).
    Onkyo TX-SR705 AVR
    Onkyo M-501-Given to my father.
    Onkyo DX-C730 CD Changer
    Onkyo DV-BD507 Blu Ray player
    Onkyo CP-1036A turntable with Grado, Audio Technique, and Azden cartridges(GOT CARTRIDGE??)
    Polk Monitor 12's with RDO's and XO's
    Polk CS300 Center
    Polk Monitor Series 4 rears

    EBAY is like cocaine. At first you only look, next thing you know, your house is full of crap you have no idea why you own.:eek:
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  • canadianicon25
    canadianicon25 Posts: 200
    edited July 2010
    thanks.

    i will contact polk parts about pricing for new drivers. meanwhile i have ebay to scour...
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  • canadianicon25
    canadianicon25 Posts: 200
    edited July 2010
    BTW,

    I've read that many rebuild the crossovers for the larger speakers (ie: SDA series). Would it be worth it to rebuild on mon 5's? If so, could someone give me a link to post(s) on the forum that talk about it?

    Thanks
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  • mhardy6647
    mhardy6647 Posts: 33,995
    edited July 2010
    Good quality, fresh new crossover capacitors would be a simple, cost-effictive "upgrade".
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  • mhardy6647
    mhardy6647 Posts: 33,995
    edited July 2010
    polkmonitorXOs.jpg

    The two XOs on the right are Monitor 5s (the other one's a 10B).
    (EDIT: I am not responsible for the 20A (?!!) fuse that may be seen in the center XO...)
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  • comfortablycurt
    comfortablycurt Posts: 6,745
    edited July 2010
    canadianicon25 wrote: »
    BTW,

    I've read that many rebuild the crossovers for the larger speakers (ie: SDA series). Would it be worth it to rebuild on mon 5's? If so, could someone give me a link to post(s) on the forum that talk about it?

    Thanks


    Here ya go.

    http://www.polkaudio.com/forums/showthread.php?t=51420
    The nirvana inducer-
    APC H10 Power Conditioner
    Marantz UD5005 universal player
    Parasound Halo P5 preamp
    Parasound HCA-1200II power amp
    PolkAudio LSi9's/PolkAudio SDA 2A's/PolkAudio Monitor 7A's
    Audioquest Speaker Cables and IC's
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  • canadianicon25
    canadianicon25 Posts: 200
    edited July 2010
    thanks.

    i think i def'n need to overhaul to XOs. One speaker sounds really dead and lifeless; the other is better but still kinda listless. Hopefully some new components will liven them up.

    Is there any advantage to upgrading the tweeter? Currently both are peerless.
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  • heiney9
    heiney9 Posts: 25,217
    edited July 2010
    canadianicon25 wrote: »
    BTW,

    I've read that many rebuild the crossovers for the larger speakers (ie: SDA series). Would it be worth it to rebuild on mon 5's? If so, could someone give me a link to post(s) on the forum that talk about it?

    Thanks

    http://www.polkaudio.com/forums/showthread.php?t=51420&highlight=5b*

    Yes, with the right gear the upgrades are fantastic.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • skrol
    skrol Posts: 3,393
    edited July 2010
    Keep the Peerless tweeters if they are working properly. There is no upgrade and they are very good.

    You said you needed a replacement mid-woofer. Do you know what model it is (MW65xx)? My Monitor 5A's have MW6500 and I may have a spare.
    Stan
    Stan

    Main 2ch:
    Polk LSi15 (DB840 upgrade), Parasound: P/LD-1100, HCA-1000A; Denon: DVD-2910, DRM-800A; Benchmark DAC1, Monster HTS3600-MKII, Grado SR-225i; Technics SL-J2, Parasound PPH-100.

    HT:
    Marantz SR7010, Polk: RTA11TL (RDO198-1, XO and Damping Upgrades), S4, CS250, PSW110 , Marantz UD5005, Pioneer PL-530, Panasonic TC-P42S60

    Other stuff:
    Denon: DRA-835R, AVR-888, DCD-660, DRM-700A, DRR-780; Polk: S8, Monitor 5A, 5B, TSi100, RM7, PSW10 (DXi104 upgrade); Pioneer: CT-6R; Onkyo CP-1046F; Ortofon OM5E, Marantz: PM5004, CD5004, CDR-615; Parasound C/PT-600, HCA-800ii, Sony CDP-650ESD, Technics SA 5070, B&W DM601
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  • FTGV
    FTGV Posts: 3,649
    edited July 2010
    mhardy6647 wrote: »
    (EDIT: I am not responsible for the 20A (?!!) fuse that may be seen in the center XO...)
    Well atleast it will eliminate the possibility of any nuisance blowing.:D
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  • canadianicon25
    canadianicon25 Posts: 200
    edited July 2010
    i actually want to replace the midranges in both speakers. they are MW6502.

    i am waiting to hear back from Polk about the cost of the new ones.
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  • jrgoswick
    jrgoswick Posts: 159
    edited July 2010
    Call customer service and MAKE SURE to tell them you are a Forum member. That'll give you a member discount. Kinda odd waiting to hear back from them-they always take my order up front.
    Onkyo TX-SR705 AVR
    Onkyo M-501-Given to my father.
    Onkyo DX-C730 CD Changer
    Onkyo DV-BD507 Blu Ray player
    Onkyo CP-1036A turntable with Grado, Audio Technique, and Azden cartridges(GOT CARTRIDGE??)
    Polk Monitor 12's with RDO's and XO's
    Polk CS300 Center
    Polk Monitor Series 4 rears

    EBAY is like cocaine. At first you only look, next thing you know, your house is full of crap you have no idea why you own.:eek:
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  • canadianicon25
    canadianicon25 Posts: 200
    edited July 2010
    i will try contacting CS again.

    BTW:

    does anyone know what the original fuse amperage was for the mon 5s?
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  • skrol
    skrol Posts: 3,393
    edited July 2010
    I believe that it is a 1Amp fast blow.
    Stan

    Main 2ch:
    Polk LSi15 (DB840 upgrade), Parasound: P/LD-1100, HCA-1000A; Denon: DVD-2910, DRM-800A; Benchmark DAC1, Monster HTS3600-MKII, Grado SR-225i; Technics SL-J2, Parasound PPH-100.

    HT:
    Marantz SR7010, Polk: RTA11TL (RDO198-1, XO and Damping Upgrades), S4, CS250, PSW110 , Marantz UD5005, Pioneer PL-530, Panasonic TC-P42S60

    Other stuff:
    Denon: DRA-835R, AVR-888, DCD-660, DRM-700A, DRR-780; Polk: S8, Monitor 5A, 5B, TSi100, RM7, PSW10 (DXi104 upgrade); Pioneer: CT-6R; Onkyo CP-1046F; Ortofon OM5E, Marantz: PM5004, CD5004, CDR-615; Parasound C/PT-600, HCA-800ii, Sony CDP-650ESD, Technics SA 5070, B&W DM601
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  • mhardy6647
    mhardy6647 Posts: 33,995
    edited July 2010
    s'posed to be AFAIK.
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  • canadianicon25
    canadianicon25 Posts: 200
    edited July 2010
    does anyone know what kind of capacitors the originals are? they don't look like electrolytic. if so, the loss of capacitance over time should be very small. my caps would have to in very bad condition to have one speaker not making much sound at all.

    it weird. at the same amp volume, sliding between L and R, one speaker is actually louder than the other! the quiet one is also very muddy sounding. could all this be attributed to capacitors?

    **EDIT**

    The schematic says electrolytic. My bad.
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  • mhardy6647
    mhardy6647 Posts: 33,995
    edited July 2010
    yes, it could be the capacitors.
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  • heiney9
    heiney9 Posts: 25,217
    edited July 2010
    I've seen many fried resistors in older polks. That could be the culprit. Just spend the money recapping and putting new resistors in. If you want to be ecomonical the Clarity Cap PX line is really good.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • canadianicon25
    canadianicon25 Posts: 200
    edited July 2010
    i didn't think about the resistors. too bad you can't accurately measure them in place.
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  • heiney9
    heiney9 Posts: 25,217
    edited July 2010
    canadianicon25 wrote: »
    i didn't think about the resistors. too bad you can't accurately measure them in place.

    In my case the wonderful "white" sandcast was brown and dark grey when I pulled it.
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • canadianicon25
    canadianicon25 Posts: 200
    edited July 2010
    what is the nominal impedance of the MW6502? There are some on sale on ebay and the seller lists them as 4ohm. I thought they were 8ohm to match an 8ohm tweeter.

    here is the ebay link:

    http://cgi.ebay.ca/Polk-MW6502-MW-6502-6-5-Woofers-M4-M5-jr-M5-M7-/230496264821?cmd=ViewItem&pt=Speakers_Subwoofers&hash=item35aaa5e275
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  • heiney9
    heiney9 Posts: 25,217
    edited July 2010
    Earlier Monitor 5's were 4 ohm nominal later Monitor 5's were 6 ohm nominal. That rating having nothing to do with what the stock drivers are. It's based on slight differences in x-over parts (values)

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • skrol
    skrol Posts: 3,393
    edited July 2010
    Here are some specs on some of the MW65xx variants. Don't you love how they took all the numbers out to 4 decimal places?

    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 6501 Driver's model #.
    Brand: Polk Driver's brand name.
    Fs: 31.0000 Hz (Free air resonance)
    Vas: 2.7545 ft^3 (Compliance volume)
    Qts: 0.2790 Total Q
    Qms: 1.4700 Mechanical Q
    Qes: 0.3440 Electrical Q
    Sd: 0.0130 M^2 (Piston area)
    Xmax: 3.1800 mm (Cone excursion, linear)
    Revc: 7.7500 ohms (DC resistance)
    Znom: 8.0000 ohms (Nominal impedance)
    Pmax: 35.0000 watts maximum rated power


    Driver: MW 6502 Driver's model #.
    Brand: Polk Driver's brand name.
    Fs: 44.0000 Hz (Free air resonance)
    Vas: 1.2360 ft^3 (Compliance volume)
    Qts: 0.2790 Total Q
    Qms: 1.9700 Mechanical Q
    Qes: 0.3250 Electrical Q
    Sd: 0.0130 M^2 (Piston area)
    Xmax: 3.1800 mm (Cone excursion, linear)
    Revc: 3.5200 ohms (DC resistance)
    Znom: 4.0000 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
    Stan

    Main 2ch:
    Polk LSi15 (DB840 upgrade), Parasound: P/LD-1100, HCA-1000A; Denon: DVD-2910, DRM-800A; Benchmark DAC1, Monster HTS3600-MKII, Grado SR-225i; Technics SL-J2, Parasound PPH-100.

    HT:
    Marantz SR7010, Polk: RTA11TL (RDO198-1, XO and Damping Upgrades), S4, CS250, PSW110 , Marantz UD5005, Pioneer PL-530, Panasonic TC-P42S60

    Other stuff:
    Denon: DRA-835R, AVR-888, DCD-660, DRM-700A, DRR-780; Polk: S8, Monitor 5A, 5B, TSi100, RM7, PSW10 (DXi104 upgrade); Pioneer: CT-6R; Onkyo CP-1046F; Ortofon OM5E, Marantz: PM5004, CD5004, CDR-615; Parasound C/PT-600, HCA-800ii, Sony CDP-650ESD, Technics SA 5070, B&W DM601
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  • canadianicon25
    canadianicon25 Posts: 200
    edited July 2010
    okay. it looks to me then that i want 4ohm drivers. i also noticed that the values of the resistors in my mon5 XO's is slightly different than the schematic. My values are 6.2ohm and 2.7ohm ( both 5W). Any idea what that is all about?
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  • heiney9
    heiney9 Posts: 25,217
    edited July 2010
    Because Polk made minor changes on the fly all the time. Always consult your X-over. In your case since you have the Peerless tweets the X-over listed is for the model with the sl2000 tweets. So there are differences because of using two different tweeters. Go with the values already in your X-over.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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