Driver Rotation?

skrol
skrol Posts: 3,391
edited November 2008 in Vintage Speakers
This may be a dumb question but here it goes anyway...

Does it make sense to rotate the drivers (ie. 45 deg or 90 deg) from time to time? I was thinking that all my drivers have been mounted the same direction for close to 20 years. For example, over time would the stamped steel baskets tend to deform with the weight of the magnet pulling the same direction? There is also the weight of the voice coils / cones that are constantly pulling on the spider springs and surrounds.

I have never heard of this being an issue but there are a lot of things that I have not heard of yet.
Stan

Main 2ch:
Polk LSi15 (DB840 upgrade), Parasound: P/LD-1100, HCA-1000A; Denon: DVD-2910, DRM-800A; Benchmark DAC1, Monster HTS3600-MKII, Grado SR-225i; Technics SL-J2, Parasound PPH-100.

HT:
Marantz SR7010, Polk: RTA11TL (RDO198-1, XO and Damping Upgrades), S4, CS250, PSW110 , Marantz UD5005, Pioneer PL-530, Panasonic TC-P42S60

Other stuff:
Denon: DRA-835R, AVR-888, DCD-660, DRM-700A, DRR-780; Polk: S8, Monitor 5A, 5B, TSi100, RM7, PSW10 (DXi104 upgrade); Pioneer: CT-6R; Onkyo CP-1046F; Ortofon OM5E, Marantz: PM5004, CD5004, CDR-615; Parasound C/PT-600, HCA-800ii, Sony CDP-650ESD, Technics SA 5070, B&W DM601
Post edited by skrol on
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Comments

  • treitz3
    treitz3 Posts: 19,197
    edited November 2008
    This is just an educated guess with absolutely no facts to back it up but I wouldn't think so.
    ~ In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence. ~
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  • Face
    Face Posts: 14,340
    edited November 2008
    In some cases the suspension can sag, causing the voice coil to rub, etc... This usually is a problem for larger drivers though.
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
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  • dorokusai
    dorokusai Posts: 25,577
    edited November 2008
    Agreed, nope. You're efforts are best spent elsewhere. I'm sure some lunatic will write a Club Polk term paper on it eventually but I'd rather go to sleep.
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • TNRabbit
    TNRabbit Posts: 2,168
    edited November 2008
    Have you ever felt the weight of a spider/coil? They weight next to NOTHING....I can't imagine it would make a hill of beans worth of difference.
    TNRabbit
    NO Polk Audio Equipment :eek:
    Sunfire TG-IV
    Ashly 1001 Active Crossover
    Rane PEQ-15 Parametric Equalizers x 2
    Sunfire Cinema Grand Signature Seven
    Carver AL-III Speakers
    Klipsch RT-12d Subwoofer
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  • Face
    Face Posts: 14,340
    edited November 2008
    TNRabbit wrote: »
    Have you ever felt the weight of a spider/coil? They weight next to NOTHING....I can't imagine it would make a hill of beans worth of difference.
    You're forgetting the weight of the cone.

    This is well documented in the Tannoy community and I've experienced it myself. But it's probably the last thing a Polkie needs to worry about.
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
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  • skrol
    skrol Posts: 3,391
    edited November 2008
    Just the engineer in me. OK, I'll stop worrying now. I might just flip them around while I have them out for the mods though.
    Stan

    Main 2ch:
    Polk LSi15 (DB840 upgrade), Parasound: P/LD-1100, HCA-1000A; Denon: DVD-2910, DRM-800A; Benchmark DAC1, Monster HTS3600-MKII, Grado SR-225i; Technics SL-J2, Parasound PPH-100.

    HT:
    Marantz SR7010, Polk: RTA11TL (RDO198-1, XO and Damping Upgrades), S4, CS250, PSW110 , Marantz UD5005, Pioneer PL-530, Panasonic TC-P42S60

    Other stuff:
    Denon: DRA-835R, AVR-888, DCD-660, DRM-700A, DRR-780; Polk: S8, Monitor 5A, 5B, TSi100, RM7, PSW10 (DXi104 upgrade); Pioneer: CT-6R; Onkyo CP-1046F; Ortofon OM5E, Marantz: PM5004, CD5004, CDR-615; Parasound C/PT-600, HCA-800ii, Sony CDP-650ESD, Technics SA 5070, B&W DM601
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  • gdb
    gdb Posts: 6,012
    edited November 2008
    SKROL, the same idea occurred to me a while ago, and I think you are right about the long-term effects of gravity, at any rate,I don't see what it could hurt to flip em ! You gonna do the Mortite seal thing ? Geoff
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  • skrol
    skrol Posts: 3,391
    edited November 2008
    Already did it. The cabinets do seem to be more air tight. I have not gotten to really try them out sonically as I finished them up late last night and family was sleeping.
    Stan

    Main 2ch:
    Polk LSi15 (DB840 upgrade), Parasound: P/LD-1100, HCA-1000A; Denon: DVD-2910, DRM-800A; Benchmark DAC1, Monster HTS3600-MKII, Grado SR-225i; Technics SL-J2, Parasound PPH-100.

    HT:
    Marantz SR7010, Polk: RTA11TL (RDO198-1, XO and Damping Upgrades), S4, CS250, PSW110 , Marantz UD5005, Pioneer PL-530, Panasonic TC-P42S60

    Other stuff:
    Denon: DRA-835R, AVR-888, DCD-660, DRM-700A, DRR-780; Polk: S8, Monitor 5A, 5B, TSi100, RM7, PSW10 (DXi104 upgrade); Pioneer: CT-6R; Onkyo CP-1046F; Ortofon OM5E, Marantz: PM5004, CD5004, CDR-615; Parasound C/PT-600, HCA-800ii, Sony CDP-650ESD, Technics SA 5070, B&W DM601
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  • F1nut
    F1nut Posts: 50,736
    edited November 2008
    For example, over time would the stamped steel baskets tend to deform with the weight of the magnet pulling the same direction? There is also the weight of the voice coils / cones that are constantly pulling on the spider springs and surrounds.

    Nope, not going to happen with those drivers.
    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."

    President of Club Polk

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  • Gretsch6136
    Gretsch6136 Posts: 80
    edited November 2008
    I flipped 'em a few years ago.

    Didn't notice any difference. Whoa, maybe its time to flip 'em back!
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