Vintage speaker xovers and pics

faster100
faster100 Posts: 6,124
edited October 2003 in Speakers
Hey, i had these old speakers i just found hooked up and the amp kept shutting down, so i find out its one that has a problem, I bridge the AMC on one and man this thing opened up.. But something is wrong with the other one????

what would cause it to shut the integra down and AMC, at low volume???? heres some inside pics
MY HT RIG:
Sherwood p-965
Sherwood sd871 dvd
Rotel 1075 amp x5
LSI15 mains
LsiC center
LSIfx surround backs
Lsi7 side surrounds
SVS pb12/plus2

2 Channel Rig:

nad 1020 Pre-amp
Rotel 1080 stereo amp
Polk sda 2B
kenwood grunt Tuner
realistic lab 450 TT
Signal cable IC
Post edited by faster100 on
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  • faster100
    faster100 Posts: 6,124
    edited October 2003
    and
    MY HT RIG:
    Sherwood p-965
    Sherwood sd871 dvd
    Rotel 1075 amp x5
    LSI15 mains
    LsiC center
    LSIfx surround backs
    Lsi7 side surrounds
    SVS pb12/plus2

    2 Channel Rig:

    nad 1020 Pre-amp
    Rotel 1080 stereo amp
    Polk sda 2B
    kenwood grunt Tuner
    realistic lab 450 TT
    Signal cable IC
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  • faster100
    faster100 Posts: 6,124
    edited October 2003
    last
    MY HT RIG:
    Sherwood p-965
    Sherwood sd871 dvd
    Rotel 1075 amp x5
    LSI15 mains
    LsiC center
    LSIfx surround backs
    Lsi7 side surrounds
    SVS pb12/plus2

    2 Channel Rig:

    nad 1020 Pre-amp
    Rotel 1080 stereo amp
    Polk sda 2B
    kenwood grunt Tuner
    realistic lab 450 TT
    Signal cable IC
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  • gatemplin
    gatemplin Posts: 1,595
    edited October 2003
    It sounds like the problem is impedence related. That is why the amps are going into protect mode.

    Check the DC resistance of the working woofer and compare it to the broken one. Maybe there is a short across part of the coil.

    Just a suggestion.
    Graham
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  • scornful
    scornful Posts: 272
    edited October 2003
    Faster...

    Seems like a very simple circuit. Sit down, draw it out, and be sure to get the same values for the electronics. Should be a piece of cake to build another one. If at all possible get the EXACT same brand and model components. The manufacturer had reasons to use those components. If you're lucky you can prolly still use the PCB rather than a Ratshack board.

    assuming it's the x-over rathe than a speaker
    Denon 3802
    B&K 7270
    Outlaw ICBM
    Behringer DSP1124P
    Samson S1000
    SVS 20-39CS+ (x2)
    RTi150's
    CSi40
    FXi30's
    RTi38's
    Win Vista HTPC
    InFocus 4805 ~100" Screen
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  • gatemplin
    gatemplin Posts: 1,595
    edited October 2003
    Faster, do the amps go into protect mode immediately?
    Graham
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  • faster100
    faster100 Posts: 6,124
    edited October 2003
    Its not both speakers, Just one and yes the amp go's right into protect, after i just start to move the dial, its gone into it.. what is this??
    MY HT RIG:
    Sherwood p-965
    Sherwood sd871 dvd
    Rotel 1075 amp x5
    LSI15 mains
    LsiC center
    LSIfx surround backs
    Lsi7 side surrounds
    SVS pb12/plus2

    2 Channel Rig:

    nad 1020 Pre-amp
    Rotel 1080 stereo amp
    Polk sda 2B
    kenwood grunt Tuner
    realistic lab 450 TT
    Signal cable IC
    · Share on FacebookShare on Twitter
  • gatemplin
    gatemplin Posts: 1,595
    edited October 2003
    It seems to be a short circuit. Unfortunately it is probably a melted voice coil. Get a multi-meter and start checking the resistance of the coils (disconnect each of them from the crossover first). That seems most likely to me. The amps are seeing almost no resistance, that is why they shut down, to protect themselves. The only other reason would be a short somewhere on the crossover network board but this is less likely.
    Graham
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