Polk LS 90 inductors

geppy1
geppy1 Posts: 3,075
in Speakers
Still not completly sold on 90s and the cabinets have damage but willing to try and the xovers look easy I am going to order Clarity Caps and Mundorf MOX res and the one small inductor All this is from Madisound as it will get here Saturday.

Which small inductor should I be ordering?

IF I was to do the two large ones which ones? Cost does matter

Goertz Inductors 12 AWG

Goertz Inductors 14 AWG

Goertz Inductors 16 AWG

Solen "Perfect Lay" Inductors 14 AWG

Steel Laminate "Sledgehammer" Inductors 15 AWG

Madisound Sidewinder Inductors 16 AWG

Madisound Air Core Inductors 19 AWG

Madisound Air Core Inductors 20 AWG






· Share on FacebookShare on Twitter

Comments

  • DollarDave
    DollarDave Posts: 2,575
    Someone can chime in on their inductor recommendations, but you may want to make sure that you are modifying them to the latest revision of the xover. They changed the value of an inductor in one of the driver pairs and also the resistor in the tweeter circuit. I can e-mail you the schematics if you would like.
    · Share on FacebookShare on Twitter
  • geppy1
    geppy1 Posts: 3,075
    Thanks I get that and would do the revised one The question is which ones?
    · Share on FacebookShare on Twitter
  • skrol
    skrol Posts: 3,387
    You should go with inductors that are the same inductance and close to the same DCR as the originals.
    Per the latest (revised) schematic:
    L1 = 0.4mH, 0.7 ohm DCR
    L2 = 1.55mH, 0.28 ohm DCR
    L3 = 1.0mH, 0.25 ohm DCR
    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
  • geppy1
    geppy1 Posts: 3,075
    Correct but there are air core, stteel lam (originals were also steel lam) and differeni wire sizes. thanks
    · Share on FacebookShare on Twitter
  • skrol
    skrol Posts: 3,387
    Air core are going to be larger but generally will have better sound. The steel core makes the inductor more efficient but there can be distortion due to eddie currents within the core.

    The wire size will dictate the DCR, which is more important.
    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
  • geppy1
    geppy1 Posts: 3,075
    I have two sets of Xovers Could I use the spare 1.55mh for the 1mh?? it is very close and remember that one started at 4mh in the original version so it gets me most of the way there and no cost plus the DCR is very close and closer then the air cores or the steel lams I am looking at.

    I also feel like if I change the one to an air core now i should change the other steel lam to an air core More cost
    · Share on FacebookShare on Twitter