Speakers popping when adding plugs to same extention

[ukpartydj]

Just got some RCF310a speakers and tried them out for the first time at the weekend and found it odd that when I plugged a light into the same extention lead the speaker popped and again when I unplugged it!
Not a big deal but I seem to remember this happening with some crappy old speakers I used at home!

Is it an issue?

[JAMdisco]

Answer: plug light in before turning speakers on, unplug light after turning speakers off

It can happen and maybe something to do with earthing (either your equipment or venue wiring). Generally if you're plugging in to same extension you will get a 'popping' sound when plugging/unplugging things.

Where possible I always try and run the speakers off a separate loop but in most venues this isn't possible.

I did have a some issues a few years back when I used a smoke machine, every time I pressed the switch to give a burst of smoke, there was a 'pop' from the speakers. Hasten to add I don't use smoke/haze these days as most venues unfortunately won't allow it

[DJ Jules]

I get this with my RCF 422a's when I power up/down equipment with noisy power switches and even noisier motors - namely Smoke and Bubble machines. I have to be very careful as I've found both these pieces of equipment can cause USB communication failure if the power cables or the wired remotes for them are too close to the USB cables. I've seen both DMX and MIDI controllers lock up because of this.

Julian

[Djanddisco]

I have a similar issue with a datamoon that goes off when I press the fog

[Vectis]

http://www.amazon.co.uk/Movable-Offs.../dp/B007Q94DMO

Other diameters and sizes are available

[ukpartydj]

http://www.amazon.co.uk/Movable-Offs.../dp/B007Q94DMO

Other diameters and sizes are available

Always wondered why my VGA cables had these on them... are they used for data cables though??

[SamV]

Those ferrite cores are only good for ground hums, they shouldn't work for whats being discussed here. Sounds like dodgy wiring.

[DJ Jules]

Those ferrite cores are only good for ground hums, they shouldn't work for whats being discussed here. Sounds like dodgy wiring.

I think you might be mixing up ferrite cores with ground loop isolators. Ferrite cores remove high frequency noise from cables and prevent the cables from acting as radio antenna - specifically they remove the radio frequency signals associated with the tiny sparks created across switches that gets broadcast as noise.

See http://en.wikipedia.org/wiki/Ferrite_bead for more details.

Julian

P.S. Going to have to get me some of these, none of the USB cables used for my decks or DMX interface have these on at present.

[JAMdisco]

Is it an issue?

I would say, don't worry about it, just make sure if you plug/unplug anything, make sure you turn the volume all the way down on your speakers or do it before you power them up (i.e. setting up)
Other thing to try is use a different wiring loom to power your speakers (separate from lights etc.) although this is not always physically possible and also difficult to ascertain where the 'other' loop actually is (if at all there is one).

[Solitaire Events Ltd]

I used to use a suppressed switch pack a while back and that stopped all the bangs and pops.