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Posted

At Friday's gig the venue had a rope light around the stage that was set on a fading pattern. Until I asked them to switch it off there was a terrible buzz coming through my rig, especially during the fading up and down part of the sequence. The lights and amp were plugged in to different sockets.

I've played here before with no problems but this time with a different rig and bass. Is this an indication of something wrong with either bass or amp that I need to look at do you think?

steve

Posted (edited)

[quote name='Muppet' timestamp='1433108117' post='2787976']
At Friday's gig the venue had a rope light around the stage that was set on a fading pattern. Until I asked them to switch it off there was a terrible buzz coming through my rig, especially during the fading up and down part of the sequence. The lights and amp were plugged in to different sockets.

I've played here before with no problems but this time with a different rig and bass. Is this an indication of something wrong with either bass or amp that I need to look at do you think?

steve
[/quote]

I take it that the LED rope light was there previously when you played ?

What are the respective basses and rigs ?

Single Coil / Humbuckers / Active Pickups ?

In any case I's say it's the LED rope light that is the real issue.

Does it run off a power supply box that takes mains and output a DC Current / Voltage ?
these are notorious for causing interference. Many won't pass EMC tests for interference but it's not really enforced effectively..

Edited by rmorris
Posted

Thanks for the replies.

Bass has twin humbuckers, both on, amp was Markbass CMD121P. Yes the rope light was there previously. I did just switch it off and problem went away. I'm happy to think the issue was with the power and the rope light transformer rather than the amp and bass but you never know!

Posted

LEDs radiate radio frequencies. Not much but its there.

You can sometimes hear it if you put an analogue radio near them, and often see it on the screen with cheapo CCTV cameras fitted with IR LEDs. Surprised it doesn't cause more problems than it seems to tbh.

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