No SDA effect

keith allen
keith allen Posts: 734
edited October 2009 in Vintage Speakers
I have had the sda's goin on four days now have spent a lot of time listening to them,I know there is no sda effect.I tested them like the polk manual explains by using balance,negative on both sides,but man they still sound gooood.Anywho gonna get some time today and check things out,Im guessing that my problem is in the xovers,or the ic cable.Anything specific to look for?I have the ohm test sheet from another thread as well
Post edited by keith allen on
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  • george daniel
    george daniel Posts: 12,096
    edited October 2009
    P/B or B/B ?
    JC approves....he told me so. (F-1 nut)
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  • Jed Leland
    Jed Leland Posts: 183
    edited October 2009
    Hello,
    One possible answer is that you have a pin/blade version of the SDA series and are using a non-common ground amplifier. That would result in no sound from the SDA components.
    Cheers, Ken
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  • NJPOLKER
    NJPOLKER Posts: 3,474
    edited October 2009
    I do believe other bad things would be heard if the power source was not common ground. Maybe you have something out of phase or a wire off/loose somewhere. I'd dive into the cabinet and investigate.
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  • Jed Leland
    Jed Leland Posts: 183
    edited October 2009
    Hello,
    The pin/blade version of the SDA speakers resulted in no damage or bad sounds, just no SDA. The earlier twin/blade version of the speakers would have shorted out a non-common ground amplifier, but not the pin/blade versions.
    Cheers, Ken
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  • keith allen
    keith allen Posts: 734
    edited October 2009
    george daniel wrote: »
    P/B or B/B ?

    B/B on the cable

    using the same amp as I did with my 2a's..nad c370
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  • Jed Leland
    Jed Leland Posts: 183
    edited October 2009
    Hello,
    What is the model number of the speakers?
    Ken
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  • george daniel
    george daniel Posts: 12,096
    edited October 2009
    Keith,, have you checked the cable for continuity?.If the cable checks out,I'm guessing that you have a crossover issue. Call or shoot Ben a pm,, he's at home,and may be able to get you going quickly. Good luck and keep us posted.
    JC approves....he told me so. (F-1 nut)
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  • keith allen
    keith allen Posts: 734
    edited October 2009
    Jed Leland wrote: »
    Hello,
    What is the model number of the speakers?
    Ken

    sda 1a
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  • keith allen
    keith allen Posts: 734
    edited October 2009
    george daniel wrote: »
    Keith,, have you checked the cable for continuity?.If the cable checks out,I'm guessing that you have a crossover issue. Call or shoot Ben a pm,, he's at home,and may be able to get you going quickly. Good luck and keep us posted.

    I'll do that George
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  • jim 249
    jim 249 Posts: 347
    edited October 2009
    Try a different SDA cable. Make sure that the speakers are in phase by checking the polarity of your speaker to amp wires. The one wire I got with mine had the connector colors reversed. (Red to black, black to red.) Don't assume they are correct by the connector color. Use the simple SDA test in the sticky section. If this all fails there is something wrong inside.
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  • TooChannel
    TooChannel Posts: 31
    edited October 2009
    Snoop around inside the cab, I had a problem with my original sda srs's with blade/blade IC and one of the female terminals had come loose, pushed right out of the receptical and was laying inside the cab
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  • Schurkey
    Schurkey Posts: 2,104
    edited October 2009
    Both speakers running reversed polarity?
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  • keith allen
    keith allen Posts: 734
    edited October 2009
    Thanx for all your reply's fellas.I got time to check everything out today,from wires inside to the resistance test,everything passed.So I ended up disconnecting the negative speaker wires again and started wigglin the ic plugs and found out I have very loose ic sockets,rigged them up and everything is workin nicely.I do need to replace the sockets in the very near future.Can I buy them,or will I have to make em?
    Thanx again!
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  • ben62670
    ben62670 Posts: 15,969
    edited October 2009
    I think I may have one or two.
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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  • george daniel
    george daniel Posts: 12,096
    edited October 2009
    good to hear you diagnosed it Keith--congrats.
    JC approves....he told me so. (F-1 nut)
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  • lightman1
    lightman1 Posts: 10,794
    edited October 2009
    ben62670 wrote: »
    I think I may have one or two.
    Ben is a freak. After what I did to him......he shouldn't be alive.
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  • jimbo1421
    jimbo1421 Posts: 772
    edited October 2009
    keith allen wrote: »
    Thanx for all your reply's fellas.I got time to check everything out today,from wires inside to the resistance test,everything passed.So I ended up disconnecting the negative speaker wires again and started wigglin the ic plugs and found out I have very loose ic sockets,rigged them up and everything is workin nicely.I do need to replace the sockets in the very near future.Can I buy them,or will I have to make em?
    Thanx again!

    Hi Keith,

    I think this is what you need if you have the blade/blade IC:

    http://www.alliedelec.com/search/productdetail.aspx?SKU=7503001

    Jim
    5.1 System:
    TCL R613 55" 4K
    Front: SRS-3.1TL
    Center: CS400i
    Surround: Monitor 10B
    PSW10 subwoofer
    Onkyo PR-SC886P Pre/Pro
    NAD T955 5 channel power amplifier
    Technics SL-1710 MK2 turntable
    Audio-Technica AT14Sa cartridge
    Parasound P3 pre-amp
    Oppo BDP-103 Blu-Ray
    2014 MacBook Pro 2.8 GHz

    2.0 Office System:
    Monitor 10A (Peerless)
    Outlaw 1050 receiver
    Parasound HCA-1000A power amp
    MacPro
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  • ben62670
    ben62670 Posts: 15,969
    edited October 2009
    Thats it.
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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  • keith allen
    keith allen Posts: 734
    edited October 2009
    Yes sir re,thats it
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  • TooChannel
    TooChannel Posts: 31
    edited October 2009
    Congrats Keith, and thanks for the link Jim. I need to replace mine also
    Joe
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