Bridging NAD 2155 for sub hook up HELP PLEASE

schwerhaiv
schwerhaiv Posts: 72
edited March 2006 in Basic Hookup/Wiring Questions
Hello,
I have an old NAD 2155, which I wanted to bridge, use at 4 ohms, and drive a SVS 20-39 sub. The amp has an A/B selector and switches for Bridging and for 4 versus 8 ohm. I am just not sure about the connections and don't want to fry the amp, which I otherwise have been very satisfied with for many years. PLEASE HELP.
-SchwerhaIV
Post edited by schwerhaiv on
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  • hoosier21
    hoosier21 Posts: 4,413
    edited March 2006
    I don't think that amp is rated for 4 ohms when bridged. I had a 2200 that is from that same line, and it was not rated for 4 ohms when bridged. You might give NAD a call and make sure.

    Russ
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  • seo
    seo Posts: 305
    edited March 2006
    I think Russ is right. Most of the NAD amps are recommended for 8 ohms only when bridged.
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  • shack
    shack Posts: 11,154
    edited March 2006
    This old NAD brochure doesn't say anything about the bridged ohm rating but all of the other NAD amps I've owned say to only drive 8 ohm speakers when bridged.

    http://207.228.230.231/info/NAD_2155.pdf
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  • flexthis
    flexthis Posts: 4
    edited March 2006
    I got your PM, the system won't let me PM you back. I love my NAD 2200. Lot's of power. I have had the police at my door telling me to turn it down. The cute blonde cop said it was impressive how clear and loud it was at the street with my doors and windows closed. Unless you are deaf I don't see a problem getting enough power to run your subs. I am running mine to a 15" Dayton that came from Partsexpress. Shoot me an eamil if you want more info....tomraman@yahoo.com
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  • reeltrouble1
    reeltrouble1 Posts: 9,312
    edited March 2006
    If you do it you will risk blowing the amp and damaging your speaker. Its a poor application when bridged. The amp will see 2 ohm loads with big bass hits, a recipe for disaster. If you use the soft clip its going to distort and sound like crap.

    RT1
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  • shack
    shack Posts: 11,154
    edited March 2006
    Big Ted...The NAD guru...knows what he is talking about! I wouldn't bridge that amp with with a sub. But hey...it's your gear...do what you want.
    "Just because you’re offended doesn’t mean you’re right." - Ricky Gervais

    "For those who believe, no proof is necessary. For those who don't believe, no proof is possible." - Stuart Chase

    "Consistency requires you to be as ignorant today as you were a year ago." - Bernard Berenson
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  • reeltrouble1
    reeltrouble1 Posts: 9,312
    edited March 2006
    everyone should have a least ONE big NAD, hopefully two!!!

    RT1
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  • ohskigod
    ohskigod Posts: 6,502
    edited March 2006
    dude, just use one channel, cant see that being a power shortage with that SVS. bridging aint worth it.
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