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  1. #1
    Junior Member
    Join Date
    Nov 2018
    Posts
    2

    SB3 Picking up a Garbled Radio Static?

    Hey! So this is a dumb question about an old product, the SB3, that I still use. I'm running monster RCA cables out of the SB3 into the Aux port of a Marantz 2270. I just had the Marantz recapped, and everything's been great, until recently, I noticed a garbled static sound emanating from the speakers. I've heard it before when there were grounding issues with the pre/amp ports on the Marantz, the plastic part of the port had broken and the metal connectors would make contact, which was repaired and the sound disappeared. I have a Y-cable in the pre-amp port, which runs to my powered HSU subwoofer. So the sub is only receiving signal. I removed those plugs and the speakers still had static. When I removed the RCA that connects to the SB3 from the amp the static drops out. I tried different outlets and the garbled radio signal was still there. It could be grounding as I live in an old house, but I was wondering if maybe it is the SB3 power supply that's picking up noise or the radio signal? I'm somewhat of novice here, so I hope this makes sense Thanks!

  2. #2
    Senior Member
    Join Date
    Jan 2010
    Location
    Hertfordshire
    Posts
    3,044
    Quote Originally Posted by Beckett View Post
    Hey! So this is a dumb question about an old product, the SB3, that I still use. I'm running monster RCA cables out of the SB3 into the Aux port of a Marantz 2270. I just had the Marantz recapped, and everything's been great, until recently, I noticed a garbled static sound emanating from the speakers. I've heard it before when there were grounding issues with the pre/amp ports on the Marantz, the plastic part of the port had broken and the metal connectors would make contact, which was repaired and the sound disappeared. I have a Y-cable in the pre-amp port, which runs to my powered HSU subwoofer. So the sub is only receiving signal. I removed those plugs and the speakers still had static. When I removed the RCA that connects to the SB3 from the amp the static drops out. I tried different outlets and the garbled radio signal was still there. It could be grounding as I live in an old house, but I was wondering if maybe it is the SB3 power supply that's picking up noise or the radio signal? I'm somewhat of novice here, so I hope this makes sense Thanks!
    Have you tried an alternative audio source into the amplifier?

    Sent from my SM-G900F using Tapatalk

  3. #3
    Senior Member
    Join Date
    Apr 2005
    Location
    Watford, UK
    Posts
    1,888
    Be methodical about diagnosing this.

    1. Plug the SB3 into a different line level input on the Marantz. (Anything other than the phono input will do, eg the tape input). Static gone? Fault is the particular input on the Marantz. Otherwise...
    2. Try a different RCA cable to connect the SB3 to the Marantz. Static gone? Fault is in the cable. Otherwise...
    3. Try a different source component (eg. CD player, DVD player, etc) using the Monster Cable into the same input of the Marantz. Static gone? Fault is in the SB3. Otherwise...
    4. Fault is in the Marantz.
    Transporter -> ATC SCM100A

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