Need help with a Mini Monitor crossover

Musicplayer
Musicplayer Posts: 13
in Vintage Speakers
the crossover in the MM have 2 resisters 2.7ohms & 1.0 ohms. Looking at schematics of other Monitor series(5jr, 5B, & 7's) they show replacing the 2.7 with a 2.0 ohms. Should I do that mod. here or keep the 2.7 resister? Also what does the change from 2.7 to 2.0 do for the speaker? Thanks for your help. MP
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  • codycatalist
    codycatalist Posts: 2,662
    http://forum.polkaudio.com/discussion/167152/polk-mini-monitors-help

    Hope this helps!
    Just a dude doing dude-ly things

    "Temptation is the manifestation of desire which equals necessity." - Mikey081057
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  • codycatalist
    codycatalist Posts: 2,662
    edited June 2016
    F1nut wrote: »
    Per Crossover;

    Caps
    (1) 12uF 50V or higher
    (1) 34uF 50V or higher

    Resistors
    (1) 1ohm 5W or higher
    (1) 2.7ohm 5W or higher

    For caps I like Sonicap, Clarity are also good. For resistors I like MIlls.

    You should remove the fuses and clean the ends as well as the holder clips.

    ***EDIT**** Welcome to the Forum!
    Just a dude doing dude-ly things

    "Temptation is the manifestation of desire which equals necessity." - Mikey081057
    " I have always had a champange taste with a beer budget" - Rick88
    "Just because the thread is getting views don't mean much .. I like a good train wreck doesn't mean i want to be in one..." - pitdogg2
    "Those that don't know, don't know that they don't know." - heiney9
    "Audiophiles are the male equivalent of cat ladies." - Audiokarma Member
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  • codycatalist
    codycatalist Posts: 2,662
    @F1nut Do you know what difference changing the values will have on the MMs?
    Just a dude doing dude-ly things

    "Temptation is the manifestation of desire which equals necessity." - Mikey081057
    " I have always had a champange taste with a beer budget" - Rick88
    "Just because the thread is getting views don't mean much .. I like a good train wreck doesn't mean i want to be in one..." - pitdogg2
    "Those that don't know, don't know that they don't know." - heiney9
    "Audiophiles are the male equivalent of cat ladies." - Audiokarma Member
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  • westmassguy
    westmassguy Posts: 6,850
    Pull one of your crossovers, and verify the values for all components. Do not change them when upgrading. Polk revised their schematics because of design changes. For example, when a fuse was deleted and replaced with a Polyswitch, the resistor value downstream was reduced to compensate. Another example, if a different tweeter was used, the resistor and capacitor in series with it may change, and the shunt inductor and resistor (if equipped) may change as well.
    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

    dhsspeakerservice.com/
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  • Musicplayer
    Musicplayer Posts: 13
    Thanks to everyone that answered my post, I'll will just update using the same size. I do have one more question for Westmassguy. When I got these MM's the original mid/woofers were gone and had been replaced with a pair of 4" sparkamatic series 8000 car speakers. In a past post you mentioned that Polk used CTS speakers in some speakers, do you know if they were used in the MM's and were the original speakers 4 or 8 ohms. Thank you for your help. MP
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  • westmassguy
    westmassguy Posts: 6,850
    CTS and Rola made essentially the same woofer back then. I'm very familiar with the 8 ohm version, but I believe Polk used the 4 ohm version. Several CP Members own the mini monitors, so they'd be the best source to verify 4 or 8 ohm.
    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

    dhsspeakerservice.com/
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