How to do

ROY BOY
ROY BOY Posts: 89
edited October 2008 in Vintage Speakers
Hi every one.
I like to know how to do common ground for sda srs 1.2TL. My AMP is ROTEL RB-1090. I have no idea if I need to run wire in both - of the speakers on back of amp or need to get done some other way. Any one willing to help ?. Thanks Roy
Post edited by ROY BOY on
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  • awe-d-o-file
    awe-d-o-file Posts: 146
    edited October 2008
    just follow the diagram on the speaker cabinet. I'm 99% sure the Rotel is common ground.


    ET

    System: MF Trivista SACD > Placette passive> CJ passive horizontal bi-amp> MF 2500A(LF) MF2100(HF) > 1.2TL's

    Other: Speltz silver Eichmann IC's & speaker wire, Econotweaks Detail Magnifiers, PS Audio P-300(source), R. Gray 600, Al Sekala's AC R/C filters, R. Gray HT PC's, Oyaide R-1's,WPC-Z , M-1, Herbie's & DIY Isolation
    Room: Qty 7 - 4' tall 18" diam. bass traps, Qty 4 - 4' X 2' X 4" panels. All DIY - man my wife is tolerant!
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  • zingo
    zingo Posts: 11,258
    edited October 2008
    Do you have a digital multimeter? That is the easiest way to determine common-ground on an amp.
    Jake
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  • ROY BOY
    ROY BOY Posts: 89
    edited October 2008
    zingo wrote: »
    Do you have a digital multimeter? That is the easiest way to determine common-ground on an amp.

    YES I do. I will see whit meter if they are having open line or not. If they are open line then it is OK to do common ground on that amp ?. I know before I test I must take out the speakers wire.
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  • zingo
    zingo Posts: 11,258
    edited October 2008
    Use the continuity setting on your DMM and check the two negative binding posts. If they have continuity, you are in good shape and just hook-up the speakers like regular.
    Jake
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  • ROY BOY
    ROY BOY Posts: 89
    edited October 2008
    zingo wrote: »
    Use the continuity setting on your DMM and check the two negative binding posts. If they have continuity, you are in good shape and just hook-up the speakers like regular.

    OK. If they do not have continuity then ok to put wire in that amp ?. Roy
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  • zingo
    zingo Posts: 11,258
    edited October 2008
    If they do not have continuity, you will have to ask the Rotel or someone who knows if tying the negative binding posts together will damage the amp.
    Jake
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  • ROY BOY
    ROY BOY Posts: 89
    edited October 2008
    Hi. I did the test last night on my amp and amp did have the continuinty in all four negative post. Do i need hook up my speaker SDA SRS 1.2TL to amp rotel RB-1090 like bi amp or just do like singel amp ?. Because I had hook up like bi amp before and it did not have good sound it all. It feel like hum in it. any thing moor to do ?.
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