Resistor Dilemma - Polk Audio LS90

thsmith
thsmith Posts: 6,082
edited January 2013 in Vintage Speakers
I am raising this outside of my LS90 upgrade and tweak post since I need some additional help so I can place my order on Monday.

According to the original LS90 schamatic I should have a 5 watt .8 ohm resistor in my crossover. Even the circuit board in my crossovers has .8 ohms printed but I found a 1 ohm in one crossover and 2 ohm in the other crossover.

They appear to be original. Maybe Polk ran out of .8 ohm resistors (?).

Anyway, by my way of thinking I should just pick up a couple of Mills 5-MRA .8 ohm resistors.

Anything wrong with my logic ?

Thanks,

Tracy
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
Post edited by thsmith on
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Comments

  • 20hz
    20hz Posts: 636
    edited January 2013
    .8 to 1 ohm is just 2/10 of a ohm I dont think its audible plus all resisters have some variance .
    I wouldnt worry about it , if the rest of the board is on spec I would replace it with a .8 or a .9 with the .9 you cant go wrong by much either way .
    But it you want to be sure wait untill monday and call polk tech support or maybe someone from plk will writt in on your message
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  • F1nut
    F1nut Posts: 50,559
    edited January 2013
    Go with the .8 ohm.
    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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  • thsmith
    thsmith Posts: 6,082
    edited January 2013
    Thanks guys, .8 makes the most sense.

    I guess Polk had some extra resistors laying around and used what was close.
    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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  • PolkieMan
    PolkieMan Posts: 2,446
    edited January 2013
    Made in China?
    thsmith wrote: »
    Thanks guys, .8 makes the most sense.

    I guess Polk had some extra resistors laying around and used what was close.
    POLK SDA 2.3 TLS BOUGHT NEW IN 1990, Gimpod/Sonic Caps/Mills RDO-198
    POLK CSI-A6 POLK MONITOR 70'S ONKYO TX NR-808 SONY CDP-333ES
    PIONEER PL-510A SONY BDP S5100
    POLK SDA 1C BOUGHT USED 2011,Gimpod/Sonic Caps/Mills RDO-194
    ONKYO HT RC-360 SONY BDP S590 TECHNICS SL BD-1
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  • thsmith
    thsmith Posts: 6,082
    edited January 2013
    DSCN3422.JPG
    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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  • gimpod
    gimpod Posts: 1,793
    edited January 2013
    F1nut wrote: »
    Go with the .8 ohm.
    +1, also go with the 12 watt Mills.
    “The two most important days in your life are the day you are born and the day you find out why.” ~ Mark Twain
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  • thsmith
    thsmith Posts: 6,082
    edited January 2013
    Why not 5 watts since that is what was spec?
    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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  • gimpod
    gimpod Posts: 1,793
    edited January 2013
    The 12 watt will give you a little insurance and can handle the power better also wont get as hot as a 5 watt would. I'm sure the 5 watt will work fine your call.
    “The two most important days in your life are the day you are born and the day you find out why.” ~ Mark Twain
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  • thsmith
    thsmith Posts: 6,082
    edited January 2013
    gimpod wrote: »
    The 12 watt will give you a little insurance and can handle the power better also wont get as hot as a 5 watt would. I'm sure the 5 watt will work fine your call.

    thanks, good to know.
    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
    · Share on FacebookShare on Twitter
  • PolkieMan
    PolkieMan Posts: 2,446
    edited January 2013
    ah Mexico good stuff! ....:cheesygrin::eek:
    POLK SDA 2.3 TLS BOUGHT NEW IN 1990, Gimpod/Sonic Caps/Mills RDO-198
    POLK CSI-A6 POLK MONITOR 70'S ONKYO TX NR-808 SONY CDP-333ES
    PIONEER PL-510A SONY BDP S5100
    POLK SDA 1C BOUGHT USED 2011,Gimpod/Sonic Caps/Mills RDO-194
    ONKYO HT RC-360 SONY BDP S590 TECHNICS SL BD-1
    · Share on FacebookShare on Twitter