dynamating RTA 12c's

soundfreak1
soundfreak1 Posts: 3,414
edited August 2011 in Vintage Speakers
In a word WOW! Tightened bass up way beyound expectations! Punchier, faster, deeper, brought the mids right out of the cabinets. Very surprising. The B's are next! Seems to open the sound stage up quite a bit. Those of you that have hessitated as I did
don't! Cheep at twice the price. BTW. Has anyone spiked your 12's like some feedback on how long a spike u used ( have carpet) but I'm a little concerned about stability, considering making some ourriggers insread. Anyone tried that?
Main Rig:
Krell KAV 250a biamped to mid/highs
Parasound HCA1500A biamped to lows
Nakamichi EC100 Active xover
MIT exp 1 ic's
Perreaux SA33 class A preamp
AQ kingcobra ic's
OPPO 83 CDP
Lehmann audio black cube SE phono pre, Audioquest phono wire (ITA1/1)
Denon DP-1200 TT. AToc9ML MC cart.
Monster HTS 3600 power conditioner
ADS L1590/2 Biamped
MIT exps2 speaker cable
Post edited by soundfreak1 on
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Comments

  • thsmith
    thsmith Posts: 6,082
    edited August 2011
    Reminds me I need to do mine. Are the RTA12s on a stand? I do not have any for mine and need to make some, do you know the demensions ?
    Speakers: SDA-1C (most all the goodies)
    Preamp: Joule Electra LA-150 MKII SE
    Amp: Wright WPA 50-50 EAT KT88s
    Analog: Marantz TT-15S1 MBS Glider SL| Wright WPP100C Amperex BB 6er5 and 7316 & WPM-100 SUT
    Digital: Mac mini 2.3GHz dual-core i5 8g RAM 1.5 TB HDD Music Server Amarra (memory play) - USB - W4S DAC 2
    Cables: Mits S3 IC and Spk cables| PS Audio PCs
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  • Mr. Bubbles
    Mr. Bubbles Posts: 736
    edited August 2011
    what all did you cover with the dynamat?
    If con is the opposite of pro, is Congress the opposite of Progress?!


    Monitor 5Jr, Monitor 5, RTA12, RTA 15TL, SDA 2A, 1c, SRS 2, 1.2TL, CRS, Atrium.
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  • Michael8it
    Michael8it Posts: 192
    edited August 2011
    oliverbubbles wrote: »
    what all did you cover with the dynamat?

    Yes, please do tell. I am preparing to rehab a pair of RTA12's and am considering this as well.
    Carver C-1, M-500 MKII, Yamaha HTR-5835, Polk RTA 12BM's (M-for mod'd).
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  • Michael8it
    Michael8it Posts: 192
    edited August 2011
    thsmith - I have stands - can take photos and dimensions if you want.
    Carver C-1, M-500 MKII, Yamaha HTR-5835, Polk RTA 12BM's (M-for mod'd).
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  • thsmith
    thsmith Posts: 6,082
    edited August 2011
    Michael8it wrote: »
    thsmith - I have stands - can take photos and dimensions if you want.

    Yes please and thank you.

    oliverbubbles, When I dynamat'ed my 1Cs I did the spokes on the basket and the top circle the spokes connect to just below the magnets.
    Speakers: SDA-1C (most all the goodies)
    Preamp: Joule Electra LA-150 MKII SE
    Amp: Wright WPA 50-50 EAT KT88s
    Analog: Marantz TT-15S1 MBS Glider SL| Wright WPP100C Amperex BB 6er5 and 7316 & WPM-100 SUT
    Digital: Mac mini 2.3GHz dual-core i5 8g RAM 1.5 TB HDD Music Server Amarra (memory play) - USB - W4S DAC 2
    Cables: Mits S3 IC and Spk cables| PS Audio PCs
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  • drumminman
    drumminman Posts: 3,396
    edited August 2011
    soundfreak1 wrote: »
    In a word WOW! Tightened bass up way beyound expectations! Punchier, faster, deeper, brought the mids right out of the cabinets. Very surprising. The B's are next! Seems to open the sound stage up quite a bit. Those of you that have hessitated as I did
    don't! Cheep at twice the price. BTW. Has anyone spiked your 12's like some feedback on how long a spike u used ( have carpet) but I'm a little concerned about stability, considering making some ourriggers insread. Anyone tried that?

    Plus 1 on the dynamat! And the Xover upgrades, rewiring, installing hurricane nuts and socket head cap screws on MW's and PR's, and spikes. :tongue:

    On the latter I used the small ones from Parts Express. They're solid brass and short.

    I wanted 'em short because I, too, am concerned that the speakers are a bit top heavy. But I'm not putting them on carpet, only on wood, so they don't need to be long.
    "Science is suppose to explain observations not dismiss them as impossible" - Norm on AA; 2.3TL's w/sonicaps/mills/jantzen inductors, Gimpod's boards, Lg Solen SDA inductors, RD-0198's, MW's dynamatted, Armaflex speaker gaskets, H-nuts, brass spikes, Cardas CCGR BP's, upgraded IC Cable, Black Hole Damping Sheet strips, interior of cabinets sealed with Loctite Power Grab, AI-1 interface with 1000VA A-L transformer
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  • soundfreak1
    soundfreak1 Posts: 3,414
    edited August 2011
    I am not set up to make the outrigers my self. Looks like a machine shop could cut some steel, slot them and drill them fairly Cheep than just need spikes. Maybe paint or a bike shop ( or paint shop) to powder coat if wanted. Doesn't look like rocket science. I'll look around my area and aee if its reasonable cost wise.
    Main Rig:
    Krell KAV 250a biamped to mid/highs
    Parasound HCA1500A biamped to lows
    Nakamichi EC100 Active xover
    MIT exp 1 ic's
    Perreaux SA33 class A preamp
    AQ kingcobra ic's
    OPPO 83 CDP
    Lehmann audio black cube SE phono pre, Audioquest phono wire (ITA1/1)
    Denon DP-1200 TT. AToc9ML MC cart.
    Monster HTS 3600 power conditioner
    ADS L1590/2 Biamped
    MIT exps2 speaker cable
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  • soundfreak1
    soundfreak1 Posts: 3,414
    edited August 2011
    As far as covering with Dynamated goes I winged it. Just covered the metal baskets on the drivers. Prob over did the pr's but the mids were easy saw a good pict. Of someone else's in the diy forem and cipher his .
    Main Rig:
    Krell KAV 250a biamped to mid/highs
    Parasound HCA1500A biamped to lows
    Nakamichi EC100 Active xover
    MIT exp 1 ic's
    Perreaux SA33 class A preamp
    AQ kingcobra ic's
    OPPO 83 CDP
    Lehmann audio black cube SE phono pre, Audioquest phono wire (ITA1/1)
    Denon DP-1200 TT. AToc9ML MC cart.
    Monster HTS 3600 power conditioner
    ADS L1590/2 Biamped
    MIT exps2 speaker cable
    · Share on FacebookShare on Twitter
  • soundfreak1
    soundfreak1 Posts: 3,414
    edited August 2011
    Correction: picts were on this forem by darqueknight under heading : SDA DRIVER SEALS....
    Main Rig:
    Krell KAV 250a biamped to mid/highs
    Parasound HCA1500A biamped to lows
    Nakamichi EC100 Active xover
    MIT exp 1 ic's
    Perreaux SA33 class A preamp
    AQ kingcobra ic's
    OPPO 83 CDP
    Lehmann audio black cube SE phono pre, Audioquest phono wire (ITA1/1)
    Denon DP-1200 TT. AToc9ML MC cart.
    Monster HTS 3600 power conditioner
    ADS L1590/2 Biamped
    MIT exps2 speaker cable
    · Share on FacebookShare on Twitter
  • Michael8it
    Michael8it Posts: 192
    edited August 2011
    Thanks for the description!
    Carver C-1, M-500 MKII, Yamaha HTR-5835, Polk RTA 12BM's (M-for mod'd).
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  • soundfreak1
    soundfreak1 Posts: 3,414
    edited August 2011
    Be aware, I've learned through another thread and confirmed thru polk that the risers on rta 12's are hollow and may not support spikes without reinforcement.
    Main Rig:
    Krell KAV 250a biamped to mid/highs
    Parasound HCA1500A biamped to lows
    Nakamichi EC100 Active xover
    MIT exp 1 ic's
    Perreaux SA33 class A preamp
    AQ kingcobra ic's
    OPPO 83 CDP
    Lehmann audio black cube SE phono pre, Audioquest phono wire (ITA1/1)
    Denon DP-1200 TT. AToc9ML MC cart.
    Monster HTS 3600 power conditioner
    ADS L1590/2 Biamped
    MIT exps2 speaker cable
    · Share on FacebookShare on Twitter
  • drumminman
    drumminman Posts: 3,396
    edited August 2011
    soundfreak1 wrote: »
    Be aware, I've learned through another thread and confirmed thru polk that the risers on rta 12's are hollow and may not support spikes without reinforcement.

    That's good to know! I installed the inserts, but have not put the spikes in as I need to build extension platforms for the speakers.

    I'll watch for that!
    "Science is suppose to explain observations not dismiss them as impossible" - Norm on AA; 2.3TL's w/sonicaps/mills/jantzen inductors, Gimpod's boards, Lg Solen SDA inductors, RD-0198's, MW's dynamatted, Armaflex speaker gaskets, H-nuts, brass spikes, Cardas CCGR BP's, upgraded IC Cable, Black Hole Damping Sheet strips, interior of cabinets sealed with Loctite Power Grab, AI-1 interface with 1000VA A-L transformer
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  • soundfreak1
    soundfreak1 Posts: 3,414
    edited August 2011
    I've desided to build new risers ( solid wood ) and replace the original ones, than I've talked to a local machine shop who can make a set of outrigers for me. 1/4" x 1" steel drilled for mounting and drilled annd taped ( 1/4 - 20 ) for the points. The cost will be aprox. 45.00 per pair plus the cost of the points. May be over kill but I think they will plenty stable and will get then up another inch or so.
    Main Rig:
    Krell KAV 250a biamped to mid/highs
    Parasound HCA1500A biamped to lows
    Nakamichi EC100 Active xover
    MIT exp 1 ic's
    Perreaux SA33 class A preamp
    AQ kingcobra ic's
    OPPO 83 CDP
    Lehmann audio black cube SE phono pre, Audioquest phono wire (ITA1/1)
    Denon DP-1200 TT. AToc9ML MC cart.
    Monster HTS 3600 power conditioner
    ADS L1590/2 Biamped
    MIT exps2 speaker cable
    · Share on FacebookShare on Twitter