Common ground amp, easy way to test?

zarrdoss
zarrdoss Posts: 2,562
edited March 2009 in 2 Channel Audio
I am looking at some amps for my sda,s and need to make sure they are common groung. Can you just run a multi tester between the two grounds and Ohm it out? If not is there any other on the spot ways you can test?

Thank you!
Post edited by zarrdoss on
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  • ben62670
    ben62670 Posts: 15,969
    edited March 2009
    Yes if it reads next to 0 ohms you are good. Some amps have resistors on the input side that are used for negative feedback so if it is near 0 I still recommend strapping the grounds.
    Ben
    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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  • zarrdoss
    zarrdoss Posts: 2,562
    edited March 2009
    ben62670 wrote: »
    Yes if it reads next to 0 ohms you are good. Some amps have resistors on the input side that are used for negative feedback so if it is near 0 I still recommend strapping the grounds.
    Ben

    Cool thanks, Not that I need to do this but by "strapping the grounds" do you mean just running one wire from one ground to the other? or one wire out of each ground to the metal chassy?

    Thanks again
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  • heiney9
    heiney9 Posts: 25,171
    edited March 2009
    Run a substantial cable from one negative speaker terminal to the other. In most cases the chassis should be left alone, unless otherwise advised.
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • zarrdoss
    zarrdoss Posts: 2,562
    edited March 2009
    ok cool thats what I thought, the sda manual was kind of non-specific.

    Thanks all, you guys kick ****!!!
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