B&K amp HUM/buzz

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dalylaleahthor
dalylaleahthor Posts: 322
in Troubleshooting
I've been starting to notice that my b&k 7250 amp is causing my speaker to hum/buzz on power up. Seems like Its also isolated to just one channel. Its real quick then goes away and doesn't happen until I turn off the amp and turn it back on.

Should I take it in for a check up? I just hope it's nothing major and is easily fixed.
Epson 3020 projector. Da Lite screen. Oppo 103. Yamaha CXA5000. B&K 7250ii. HSU VTF2. Def Tech Supercube 4000. Polk Rtia9 CsiA6 FxiA6. Monster hts 2600. Home theater.

Bedroom consist of NHT model 2 powered by Parasound hca1200ii coming from my computer.

Stuff laying around. Too much to list but don't want to sell either.
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  • tonyb
    tonyb Posts: 32,909
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    I would switch out the interconnect cable related to the channel with the hum first. Sometimes a poorly constructed cable can give you the same results.

    Other than that, a cap maybe has seen it's last days. Pop the top and look for any leaking, bloated caps. Most any audio repair shop can fix that if your not comfortable doing it.
    HT SYSTEM-
    Sony 850c 4k
    Pioneer elite vhx 21
    Sony 4k BRP
    SVS SB-2000
    Polk Sig. 20's
    Polk FX500 surrounds

    Cables-
    Acoustic zen Satori speaker cables
    Acoustic zen Matrix 2 IC's
    Wireworld eclipse 7 ic's
    Audio metallurgy ga-o digital cable

    Kitchen

    Sonos zp90
    Grant Fidelity tube dac
    B&k 1420
    lsi 9's
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  • dalylaleahthor
    dalylaleahthor Posts: 322
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    Thanks Tony will do.
    Epson 3020 projector. Da Lite screen. Oppo 103. Yamaha CXA5000. B&K 7250ii. HSU VTF2. Def Tech Supercube 4000. Polk Rtia9 CsiA6 FxiA6. Monster hts 2600. Home theater.

    Bedroom consist of NHT model 2 powered by Parasound hca1200ii coming from my computer.

    Stuff laying around. Too much to list but don't want to sell either.
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  • dalylaleahthor
    dalylaleahthor Posts: 322
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    Forgot to ask if it can damage my speakers?
    Epson 3020 projector. Da Lite screen. Oppo 103. Yamaha CXA5000. B&K 7250ii. HSU VTF2. Def Tech Supercube 4000. Polk Rtia9 CsiA6 FxiA6. Monster hts 2600. Home theater.

    Bedroom consist of NHT model 2 powered by Parasound hca1200ii coming from my computer.

    Stuff laying around. Too much to list but don't want to sell either.
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  • WagnerRC
    WagnerRC Posts: 2,139
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    if your amp has xlr connections make sure the jumper is installed correctly
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  • dalylaleahthor
    dalylaleahthor Posts: 322
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    No xlr on my amp just rca.
    Epson 3020 projector. Da Lite screen. Oppo 103. Yamaha CXA5000. B&K 7250ii. HSU VTF2. Def Tech Supercube 4000. Polk Rtia9 CsiA6 FxiA6. Monster hts 2600. Home theater.

    Bedroom consist of NHT model 2 powered by Parasound hca1200ii coming from my computer.

    Stuff laying around. Too much to list but don't want to sell either.
    · Share on FacebookShare on Twitter