Question about Audio Players & Recorders
I have a loud hum problem with Velodyne CT100.
The hum appears when I turn up the volume with only sub cable in it, but when I unplug the sub cable the hum disappear. I replaced the cable with two known good sub cable the hum comes back.I removed the amp plate and didn't see any visual defect.
i have solved thsi problem. The reseller suggested that probably a earthconnection was demaged and indeed that was the problem. by heating the earthconnections, specially the wired ones this problem disappeared.
Posted on Feb 02, 2008
SOURCE: I have a Boston Acoustics
I'm thinking you have an open shield ground on the RCA input side. Connecting speaker inputs possibly restores the ground. Try connecting the high level inputs then disconnect the remote end of the cables (floating the grounds).
Then get out an ohmmeter and find that open circuitor or bad solder joint between RCA ground and real ground in the speaker's amplifier. Or.... if speaker ground kills the hum and you want to use RCA Line Level input to the sub, just connect one minus speaker output on your source amp to one minus on the sub's amp.
Posted on Mar 01, 2011
Testimonial: "Excellent diagnosis and troubleshooting steps to confirm suspected fault. Thanks..."
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