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  1. #1

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    Default Monitor 7 - which version do I have? What is best bang-for-the $ mod?

    (Same question, new thread with pics.)

    The prodigal son has returned to Polk-dom after decades of being away. Am returning slowly, with a pair of Monitor 7's a pair of 4's.

    Version - what version of the 7 do I have?

    Mods - what are the most value-oriented mods? Crossover upgrade? New tweeters? ...


    All thoughts welcome.
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  2. #2

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    Looks like 7C. I have the same one but haven't opened the drivers to check.

    Most bang: Crossover upgrade.

    Boston A400,VR950, DefTech BP10,, Klipsch Forte,KSP-400,KSF-C5,RF3,RC3.
    JBL L20t,L80t3, EPI 20+,T/E 280, Polk 4,4.5,5A,7C, KEF Coda III, Yamaha NS-690, Genesis 3+.
    SUB:Deftech PF15TL+, DCM TB1010, Velodyne VA08BVX10. Pre: HK AP2500. Amps: BB175, Adcom GFA-535,555II, Rotel RB-990BX.

  3. #3

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    Silver dome SL2000 tweeters are the give away there.

    How do you like their sound? Because if they sound a little bright to you. I'd replace those with the RD-0194s first. And then do the crossovers. If they don't bother you that much, go crossover first!

    Enjoy!

    cnh
    Onkyo TX-SR 805 System #1 HT AVR
    Office Two Channel: LSi-7s (Nakamichi CA-5, NAD 214, Pioneer BDP51fd)
    Vintage Polks: Polk Monitor 5As, Monitor 7Bs [HK 730], Monitor 10As [Marantz 2265], SDA-2Bs [Jolida JD-303, Jolida MV-MK4]
    Headphones: HD600, Q701, ATH-M50s etc. Bravo Audio Ocean amp., Onkyo P-304, Adcom GFA-555, Technics Direct Drive TT

  4. #4

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    Quote Originally Posted by Mystery View Post
    Looks like 7C. I have the same one but haven't opened the drivers to check.

    Most bang: Crossover upgrade.
    Would your recommendation change if I've never done soldering?

  5. #5

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    It's pretty simple crossover so you can do it.
    Just watch some YouTube videos on how to solder.

    Boston A400,VR950, DefTech BP10,, Klipsch Forte,KSP-400,KSF-C5,RF3,RC3.
    JBL L20t,L80t3, EPI 20+,T/E 280, Polk 4,4.5,5A,7C, KEF Coda III, Yamaha NS-690, Genesis 3+.
    SUB:Deftech PF15TL+, DCM TB1010, Velodyne VA08BVX10. Pre: HK AP2500. Amps: BB175, Adcom GFA-535,555II, Rotel RB-990BX.

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    Just ordered Sonicaps and Mills, to replace what's there and and to replace polyswitch with a .33. Hopefully I won't burn the garage down during the soldering.

  7. #7

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    Quote Originally Posted by cnh View Post
    Silver dome SL2000 tweeters are the give away there.

    How do you like their sound? Because if they sound a little bright to you. I'd replace those with the RD-0194s first. And then do the crossovers. If they don't bother you that much, go crossover first!

    Enjoy!

    cnh
    thats what id do. But i dont mind the stock tweets in my 7's.... Good luck on your crossover upgrades
    Last edited by boston1450; 04-30-2014 at 01:53 PM.
    Randy
    HT-SDA1c Yamaha-RXV1-Denon-POA2200-HK DVD25-Cs400i-Monitor4's-Premier Acoustic150
    2ch-SDA2b-ADCOM GFA-555-565-600-555-YaQinCd2-Pioneer PL-630
    Pioneer-SA9800-TXd1000-CTf9191-RT-909-Monitor11-Peerless
    Marantz-2252b-5025b-6300-YaQinCd1-TeacA4010s-Monitor7
    Yamaha-CR2040-Advent2-TeacA4010s-Monitor7

    Yamaha-CA810-CT810----- No Speakers Yet :( undecided ???

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    Quote Originally Posted by boston1450 View Post
    thats what id do. But i dont mind the stock tweets in my 7's.... Good luck on your crossover upgrades
    I'm with you there. I've noticed that I mind the SL2000 less and they don't sound that bad as I age. Probably can't hear the hump that well. Although my top end hearing is still around 15Khz. Maybe it's less sensitive up there?

    cnh
    Onkyo TX-SR 805 System #1 HT AVR
    Office Two Channel: LSi-7s (Nakamichi CA-5, NAD 214, Pioneer BDP51fd)
    Vintage Polks: Polk Monitor 5As, Monitor 7Bs [HK 730], Monitor 10As [Marantz 2265], SDA-2Bs [Jolida JD-303, Jolida MV-MK4]
    Headphones: HD600, Q701, ATH-M50s etc. Bravo Audio Ocean amp., Onkyo P-304, Adcom GFA-555, Technics Direct Drive TT

  9. #9

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    Quote Originally Posted by cnh View Post
    I'm with you there. I've noticed that I mind the SL2000 less and they don't sound that bad as I age. Probably can't hear the hump that well. Although my top end hearing is still around 15Khz. Maybe it's less sensitive up there?

    cnh
    I don't mind SL2000 either.

    It also depends upon how long you listen at a time.
    I never listen more than an hour sitting at a place, usually it's around 6 songs, 1/2 hour.
    While the music is always being played, I don't think that hump matters when you are away or doing other things around the house.
    May be those who listen critically for hours get annoyed by that hump thingy more as the time goes by.

    I even like Forte with those two big horns but a friend of mine who also has Forte says, they kinda start poking with those horns after a while.

    Boston A400,VR950, DefTech BP10,, Klipsch Forte,KSP-400,KSF-C5,RF3,RC3.
    JBL L20t,L80t3, EPI 20+,T/E 280, Polk 4,4.5,5A,7C, KEF Coda III, Yamaha NS-690, Genesis 3+.
    SUB:Deftech PF15TL+, DCM TB1010, Velodyne VA08BVX10. Pre: HK AP2500. Amps: BB175, Adcom GFA-535,555II, Rotel RB-990BX.

  10. #10

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    Ive listened to my 7's for 4+ hours without fatigue to my ears. The tweets dont sound as pleasing as the Peerless tweeters & ive never heard the RDO's but hope to change them out in the near future. If the dust ever settles here
    Randy
    HT-SDA1c Yamaha-RXV1-Denon-POA2200-HK DVD25-Cs400i-Monitor4's-Premier Acoustic150
    2ch-SDA2b-ADCOM GFA-555-565-600-555-YaQinCd2-Pioneer PL-630
    Pioneer-SA9800-TXd1000-CTf9191-RT-909-Monitor11-Peerless
    Marantz-2252b-5025b-6300-YaQinCd1-TeacA4010s-Monitor7
    Yamaha-CR2040-Advent2-TeacA4010s-Monitor7

    Yamaha-CA810-CT810----- No Speakers Yet :( undecided ???

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    After having them for a while, I can see why some people feel the high end is 'too much'. Will see the impact of the cap & resistor changes; if still too brilliant, may then consider the 194's.

  12. #12

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    Quote Originally Posted by SingleMaltKing View Post
    After having them for a while, I can see why some people feel the high end is 'too much'. Will see the impact of the cap & resistor changes; if still too brilliant, may then consider the 194's.
    The resister value you replace that polyswitch with will have an impact on your high end; I replaced mine with a 0.5 Ohm resister and am very happy (the PS measured out at >1 Ohm after I pulled it--but it was >20 years old). One thing is for sure: get rid of the PS!
    Yamaha DSP-A1 Integrated Amp
    (4) Polk Monitor 10B's w/SoniCaps, Mills, and RDO-194 tweets (R/L F/R)
    (2) Polk Monitor 4's w/peerless tweets (dual centers)
    B&O TX2 Turntable
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    Pioneer CLD-99 Elite LD
    Samsung BD-P2550 Blu-Ray/DVD
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    Princeton AF3.0HD Monitor
    Optoma HD65 Projector

  13. #13

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    Quote Originally Posted by StantonZ View Post
    The resister value you replace that polyswitch with will have an impact on your high end; I replaced mine with a 0.5 Ohm resister and am very happy (the PS measured out at >1 Ohm after I pulled it--but it was >20 years old). One thing is for sure: get rid of the PS!
    StantonZ, thanks. I followed the threads and opinions of what to replace with (and yes, I had concluded that the PS had to be replaced). Replacing with a .25 ohm, rather than a .5 and rather than a jumper. I am doing the replacements one part at a time, and will provide thoughts at each step.

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