Dynamat & The LSiM Series???

Not long after I got my RTi setup, I removed all the drivers and applied Dynamat to the baskets and magnet covers with the help of the members here. I remember when I first played a song afterwords, I didn't really hear a difference. I was used to playing music at a lower volume level with the Rti8's because of their brightness. Once, I turned the volume up, I could hear the benefit of the Dynamat. At the time, I was using a CSi3 as a center, before buying the CSi5. I thought that biggest difference could be heard in the center channel during movies. It seemed to bring out a lot more detail in voices and had a warmer sound with deeper voices. Cost vs. benefit, I love Dynamat. I had planned on taking apart my 703's soon and giving them the same Dynamat treatment.

Last night I downloaded the Info Sheet on the LSiM series from Polk's website. From the pictures, I saw that these baskets weren't the typical baskets I was used to seeing in speakers.
is0znp3is76d.jpg

Then after reading further, I learned the these speakers use cast aluminum baskets. Since cast aluminum doesn't ring like stamped steel, are there any parts inside that are worth Dynamating? Should I leave everything as is?
hpvh7v6fp3bk.jpg

I have to leave for a few hours. I'll check back later to see any comments or suggestions. Thanks!

Components - Pioneer Elite SC-05 | Pioneer BDP-51FD | Monster PowerCenter HTS 5000 | Sony Bravia | Dish Network
Speakers - Polk LSiM: 703, 706c | Polk: RTi8, CSi5, F/Xi3, CSi3 Single Rear | Subs: HSU Research VTF-2 MK4, PSW125, PSW303
Cables - Doug's Furez DCF124BW SC's | Pangea: AC-9SE x2, 14SE, 14 PC's | AudioQuest Chocolate HDMI's | Monster M850SW
Tweaks - PS Audio Power Port Classics | Acoustic Treatments OC703 | Dynamat: Components, Baskets | Pio SC-05 IEC Inlet Mod
| Sanus Mass Loaded UF30

Comments

  • F1nutF1nut Posts: 38,502
    Nothing to Dynamat in those speakers that I'm aware of.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."


  • xschopxschop Posts: 711
    Glue/Powergrab any magnets would be a wise investment in time.
  • HermitismHermitism Posts: 1,304
    F1nut wrote: »
    Nothing to Dynamat in those speakers that I'm aware of.
    Thanks, this is great news. One less thing I have to do this month. You know, when I got them home and was cleaning all the smudges off the outside, I noticed what a great build quality the cabinets were on the outside. The way the side wood panels come together with the top panel, the way the front piano black panel fits, just really nice quality. Looks like the innards are just as nice. Never owned a set of speakers with cast aluminum baskets before, I feel like I'm in the big time now!
    xschop wrote: »
    Glue/Powergrab any magnets would be a wise investment in time.
    That's another thing I don't know much about. I've read comments about magnet shifting in threads regarding vintage speakers, but never saw mention of what causes it. Is it due to the life span of the glue used to seat the magnets or because older speakers have been moved around more, from one home to another, transit bumps, etc.? Is there a certain age of a speaker when one should start looking into re-gluing their magnets?


    note: I'm very lazy when it comes to "liking", "agreeing" and marking comments "insightful". I always appreciate members answering my questions, even if I don't like or lol them. It's soooo facebook!
    Components - Pioneer Elite SC-05 | Pioneer BDP-51FD | Monster PowerCenter HTS 5000 | Sony Bravia | Dish Network
    Speakers - Polk LSiM: 703, 706c | Polk: RTi8, CSi5, F/Xi3, CSi3 Single Rear | Subs: HSU Research VTF-2 MK4, PSW125, PSW303
    Cables - Doug's Furez DCF124BW SC's | Pangea: AC-9SE x2, 14SE, 14 PC's | AudioQuest Chocolate HDMI's | Monster M850SW
    Tweaks - PS Audio Power Port Classics | Acoustic Treatments OC703 | Dynamat: Components, Baskets | Pio SC-05 IEC Inlet Mod
    | Sanus Mass Loaded UF30
  • WLDockWLDock Posts: 2,043
    edited November 2017
    Much engineering went into limiting resonance in the driver cone, surround, basket, etc. You will appreciate them even more when you read the Technical Brief:

    http://www.sohmerassoc.com/cedia_2011/sa_cedia_2011_downloads/polk_audio/LSiMSeries_technical_brief.pdf

    I've rebuild a LSiM706C center channel speaker that got damaged in shipping. The drivers are heavy advanced units. The cones are light, the basket is about as open as you can get, and the ferrite magnets are large. No need to bother with these drivers.

    eljztxowus8w.jpg
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  • gp4jesusgp4jesus Posts: 1,037
    Dynamat, Armaflex, pipe wrap from Lowe's...

    Covering those shiny surfaces will improve your SQ.
    Samsung 60" UN60ES6100 LED
    Outlaw Audio 975 Pre/Pro
    Samsung BDP, DirecTV Rcvr, Xbox 360, Dennon LDP, Phillips CD chgr

    Canare 14 ga - LCR tweeters inside; CC outside
    BJC 10 ga - LCR mids, inside & out
    8 ga Powerline - LR woofers, inside & out

    LR: tri-amped RTi A7. Woofers, Rotel 98X amp; M & T, P'sound HCA-1000
    CC: Rotel RB985 -> tri-amped CSi A6
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    Surrounds: Hafler XL280 -> AR 12 ga -> RTi A3*
    Power Conditioning & Distribution:
    3 dedicated 20A feeds; APC H15; 4 Furman Miniport 20s
    *Bi-amped early 2018 (I hope)
  • pitdogg2pitdogg2 Posts: 8,296
    I don't know cast aluminum baskets do not ring like stamped steel.
  • Viking64Viking64 Posts: 1,056
    pitdogg2 wrote: »
    I don't know cast aluminum baskets do not ring like stamped steel.

    What about that flesh-colored part off to the left? Those are known to have rings on occasion.
  • HermitismHermitism Posts: 1,304
    WLDock wrote: »
    Much engineering went into limiting resonance in the driver cone, surround, basket, etc. You will appreciate them even more when you read the Technical Brief
    Hey, thanks for the link and photo of the driver/basket. I'll read the technical brief tomorrow. I had downloaded the manual and info sheet, but didn't have the one you posted. Greatly appreciated!
    Viking64 wrote: »
    pitdogg2 wrote: »
    I don't know cast aluminum baskets do not ring like stamped steel.
    What about that flesh-colored part off to the left? Those are known to have rings on occasion.
    You know, I applied a square of Dynamat to my earring once to keep it from rattling during a movie. I'm a real trend setter and the chicks dig me! My hair was so short then.

    a5170e4pn2bb.jpg


    Components - Pioneer Elite SC-05 | Pioneer BDP-51FD | Monster PowerCenter HTS 5000 | Sony Bravia | Dish Network
    Speakers - Polk LSiM: 703, 706c | Polk: RTi8, CSi5, F/Xi3, CSi3 Single Rear | Subs: HSU Research VTF-2 MK4, PSW125, PSW303
    Cables - Doug's Furez DCF124BW SC's | Pangea: AC-9SE x2, 14SE, 14 PC's | AudioQuest Chocolate HDMI's | Monster M850SW
    Tweaks - PS Audio Power Port Classics | Acoustic Treatments OC703 | Dynamat: Components, Baskets | Pio SC-05 IEC Inlet Mod
    | Sanus Mass Loaded UF30
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