Are Monitor 70's worth upgrading?

gdphoto
gdphoto Posts: 182
in Speakers
I stumbled across a very nice pair of Monitor 70's in my local thrift shop. They were asking $100.00 for them. I happened to have a 25% off coupon with me they had emailed me and got then for $75.00. They look and sound very good. I use them in my little work room where I clean LP's and tinker with fixing things. At best they sound as good as my Monitor 5B's, which I am waiting for parts to rebuild the XO's. Doing my homework on the 5B's rebuild I started wondering if the M70's are worth rebuilding. How old do you think they are?
Any suggestions on rebuilding their XO's, or any other mods worth doing? By the way,I will use them with my Hafler DH220 power amp which pumps out 115 watts per channel. I am also wondering if the M5B's sound so good in their original form, will they blow away the M70's after they are rebuilt?
Hafler DH220 Power amp Recapped
Hafler DH110 Preamp Recapped
Hafler Digital FM Tuner
Virtue Audio M1 Piano CD Player
Technics SL-1210-MK5 with a Rega Exact Cartridge
Polk SDA1c's(Rebuilt XO's by Ben) RDO194 Tweeters
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Comments

  • gdphoto
    gdphoto Posts: 182
    I just reposted this in Vintage Speakers.
    Hafler DH220 Power amp Recapped
    Hafler DH110 Preamp Recapped
    Hafler Digital FM Tuner
    Virtue Audio M1 Piano CD Player
    Technics SL-1210-MK5 with a Rega Exact Cartridge
    Polk SDA1c's(Rebuilt XO's by Ben) RDO194 Tweeters
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  • Nightfall
    Nightfall Posts: 10,086
    They're not that old. I'm surprised you think they're on par with your Monitor 5s. I wouldn't bother with their crossovers.
    afterburnt wrote: »
    They didn't speak a word of English, they were from South Carolina.

    Village Idiot of Club Polk
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  • gdphoto
    gdphoto Posts: 182
    I was pretty surprised as well that they didn't blow away the 5b's. They sure are prettier. I already ordered the parts to rebuild the 5b's. It will be a nice little project for a cold night. thanks for your input.
    Hafler DH220 Power amp Recapped
    Hafler DH110 Preamp Recapped
    Hafler Digital FM Tuner
    Virtue Audio M1 Piano CD Player
    Technics SL-1210-MK5 with a Rega Exact Cartridge
    Polk SDA1c's(Rebuilt XO's by Ben) RDO194 Tweeters
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  • Nightfall
    Nightfall Posts: 10,086
    edited January 2017
    Other way around, I'd say the M5's are better than the M70's except with maybe bass.
    afterburnt wrote: »
    They didn't speak a word of English, they were from South Carolina.

    Village Idiot of Club Polk
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  • Dabutcher
    Dabutcher Posts: 2,597
    Lower power I would guess the M5's would be better ,but with at least 75 watts from a strong reciever or amp I think the M70's outperform them. I own both. It's all in what you listen to and personal preferences. Peace. D
    MIT Magnum MH-750, Monster HTS 5100MKII, Sony 77" Class - A80CJ Series - 4K UHD OLED,PS4, Def Tech 15” sub,LSIM 706c, Sunfire Signature Grand 425 x 4,Parasound hca 120, LSiM 702 x 4, Oppo 103D, SDA SRS 1.2, Pioneer Elite SC63 , Pioneer Elite BDP-05 “Why did you get married if you wanted big speakers?”
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  • gdphoto
    gdphoto Posts: 182
    Received all of me XO parts and started taking apart the M5b's. One of the Mids has a dimple in the center and one PR is coming off of the center mesh that connects it to the magnet. Never noticed and issue with the sound. Is there a way to repair these?
    Hafler DH220 Power amp Recapped
    Hafler DH110 Preamp Recapped
    Hafler Digital FM Tuner
    Virtue Audio M1 Piano CD Player
    Technics SL-1210-MK5 with a Rega Exact Cartridge
    Polk SDA1c's(Rebuilt XO's by Ben) RDO194 Tweeters
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  • gdphoto
    gdphoto Posts: 182
    Noticed that there is no polyswitch on the M5B XO's. Also, What is the difference between the 5A's and the 5B's?
    Hafler DH220 Power amp Recapped
    Hafler DH110 Preamp Recapped
    Hafler Digital FM Tuner
    Virtue Audio M1 Piano CD Player
    Technics SL-1210-MK5 with a Rega Exact Cartridge
    Polk SDA1c's(Rebuilt XO's by Ben) RDO194 Tweeters
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  • Nightfall
    Nightfall Posts: 10,086
    gdphoto wrote: »
    and one PR is coming off of the center mesh that connects it to the magnet.

    Have your PR's been replaced with active drivers? There shouldn't be a magnet on them.

    Aleene's glue, I believe, is what you're looking for.
    afterburnt wrote: »
    They didn't speak a word of English, they were from South Carolina.

    Village Idiot of Club Polk
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  • gdphoto
    gdphoto Posts: 182
    Your right! No magnet.
    Hafler DH220 Power amp Recapped
    Hafler DH110 Preamp Recapped
    Hafler Digital FM Tuner
    Virtue Audio M1 Piano CD Player
    Technics SL-1210-MK5 with a Rega Exact Cartridge
    Polk SDA1c's(Rebuilt XO's by Ben) RDO194 Tweeters
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  • K_M
    K_M Posts: 1,629
    Nightfall wrote: »
    Other way around, I'd say the M5's are better than the M70's except with maybe bass.

    Are the Monitor series that bad really?
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