magnet issue?

thejck
thejck Posts: 849
edited January 2012 in Vintage Speakers
On one of my mid drivers drivers.. when I push on it with my fingers spread across the cone from top to bottom and sides I do not hear any scrapping. However if my finger is just on the bottom of the driver and i push I hear a scrapping sound.. Is this a problem?
Post edited by thejck on
· Share on FacebookShare on Twitter

Comments

  • Toolfan66
    Toolfan66 Posts: 17,243
    edited January 2012
    Your tilling the voice coil just enough to make it rub is my guess..
    · Share on FacebookShare on Twitter
  • thejck
    thejck Posts: 849
    edited January 2012
    thats what it feels like. i guess i can tell for sure when the coils move the cone rather than my finger. sigh...
    · Share on FacebookShare on Twitter
  • F1nut
    F1nut Posts: 50,565
    edited January 2012
    That's normal, not a problem.
    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

    · Share on FacebookShare on Twitter
  • skrol
    skrol Posts: 3,375
    edited January 2012
    I have a MW6500 like that if you press the cone slightly unevenly. Musically, sounds fine and plays just as well as the one I replaced it with. I even connected a function generator and ran it through the frequency range and no abnormal sounds were produced.
    Stan
    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
    · Share on FacebookShare on Twitter
  • thejck
    thejck Posts: 849
    edited January 2012
    thanks guys... appreciate your putting my mind to ease.. for those of us without special equipment.. is there a way to check a driver other than a ohm meter and putting your ear to the speaker?
    · Share on FacebookShare on Twitter
  • F1nut
    F1nut Posts: 50,565
    edited January 2012
    If a driver has a problem, you'll hear it.
    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

    · Share on FacebookShare on Twitter
  • gdb
    gdb Posts: 6,012
    edited January 2012
    " if my finger is just on the bottom of the driver and i push I hear a scrapping sound."

    Don't do that................. let the electrons do the majority of cone movement.:wink:
    · Share on FacebookShare on Twitter
  • thejck
    thejck Posts: 849
    edited January 2012
    hehe... I was freaking out cause I had such a hard time pulling the driver off the cab.
    · Share on FacebookShare on Twitter