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    need help with my Marantz 7C

    I have a Marantz 7C preamp that recently made a sound like a car engine revving up. Quickly shut it down. After looking inside the preamp I noticed some stray voltage when using the high line input...
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    JBL C55 speaker modification question

    JBL high efficiency speakers, (2) 130B woofers, (1) 275 compression driver and (1) 075 Tweeter per side. JBL C55 rear horn loaded enclosure.
    Problem: Need more low bass extension.
    Would a rear...
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    Okay still need some help with this, Hamilton was...

    Okay still need some help with this, Hamilton was kind enough to offer a diaphragm he has, the only problem with that, is that I need a 16ohm diaphragm and he has an 8ohm. So if someone has 1 or...
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    JBL does not make the proper diaphragms for the...

    JBL does not make the proper diaphragms for the 075, You have to use the 2405 and make modifications to achieve the proper air gap. At least this is what I was told my a tech at JBL.
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    075 Diaphragm replacement & Gap

    My father-in law's 075 tweeters need the diaphragms replaced.:( I contacted JBL and was told that he could use the 2405 diaphragm if the phase plug was milled down to create the proper air gap. My...
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    NEED TO GET MEASUREMENTS OF LENSES

    I'm hoping someone can provide me with the correct measurements for the L-91 lenses. The 2308 lens measurments would work also. I need the flat dimensions. Thanks
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    Need help with Lenses

    Dear forum members I am looking for some pictures of the old style lenses L-91, it seems that at some point the shape of the center may have gone to a slight curve and I was wondering what that...
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    My father in-law is upgrading his JBL 275 driver...

    My father in-law is upgrading his JBL 275 driver with a H91 horn. He is replacing his current short throw horn with the H91 and wanted the L91 Lenses to go with them. He also has a JLB 075 tweeter...
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    LENSES OVER WOOFER

    My Father in-law has a pair of JBL C-55 enclosures and would like to put a pair of L-91's on them. The concern we have is that the Lenses will overlap the 2 woofers a little bit. Is that a problem?...
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