Chrisso86 Posted July 26, 2017 Share Posted July 26, 2017 Hello, I am trying to sort an interesting conundrum. Our church uses a Roland M300 desk with S-1608 multi core. We are using fisher mini amp packs and a head phone amplifier. (ART headlamp 6) The worship leader needs a foot switch to be able to switch his mic from FOH to the IEM'S. We bought a Hotshot DM1 and it caused loud clicking on both sides when used, as it said it didn't do this we got a replacement and the same thing happened. All phantom power was switched off to both channels, but stil very loud clicking. We are wondering because the S-1608 is powered and all the pre-amps are in the multi, if this was part of the issue.Everything is on single phase powered from an EMO The Switcher 1 - Has anyone had this issue before? 2 - anyone know how to overcome it? 3 - any wiring or changes or making of kit we could do to sort this problem? FYI SM58 into DM1, Out1 goes to FOH mix, Out 2 goes to IEM mix. Simples, all balanced XLRs, 4m from DM1 to SD16 Link to comment Share on other sites More sharing options...
timsabre Posted July 26, 2017 Share Posted July 26, 2017 Clicks are caused by changes in DC voltage. So your outputs must have different DC voltages on them - are you saying that both outputs just go straight into the stagebox? (M300 is a Roland desk - did you mean X32?) Link to comment Share on other sites More sharing options...
Chrisso86 Posted July 26, 2017 Author Share Posted July 26, 2017 Hi Timsabre. Yep, both outputs going into the stage box. Sorry, yes Roland M300 with S-1608 (updated post to reflect this) I'm away camping and vert tired ** laughs out loud **. Link to comment Share on other sites More sharing options...
timsabre Posted July 26, 2017 Share Posted July 26, 2017 Get a voltmeter and meter the 2 stagebox connections you're using - pin 2 to pin 1 then pin 3 to pin 1 to check for unintended voltages. You might be able to fix it by putting series capacitors between the stagebox and the switch, but you shouldn't need to so it might be best to find out why the problem is occurring. (why are you worrying about PA when you are away camping?? go and find a nice fire to sit next to and burn things!) Link to comment Share on other sites More sharing options...
alistermorton Posted July 26, 2017 Share Posted July 26, 2017 (why are you worrying about PA when you are away camping?? go and find a nice fire to sit next to and burn things!) Reminds me ... one of the guys on our last show had a t-shirt: Once a venture scout, always a pyromaniac. Link to comment Share on other sites More sharing options...
revbobuk Posted July 26, 2017 Share Posted July 26, 2017 Is the behaviour the same irrespective of the position of the 'Ground' switch on the DM1? The other checks I would make would be to put the cables you are using into a tester - just check that there are no reversals, and that shells are not connected to pin 1. And try swapping the outputs over (I realise that won't work as a solution, as the DM-1 is a non-latching switch, but it will give more information. My guess would be that the S-1608 is leaving some residual voltage on the input even when Phantom is switched off. Link to comment Share on other sites More sharing options...
Chrisso86 Posted July 26, 2017 Author Share Posted July 26, 2017 Camping with friends from church on a church camp so it came up in convo Yer, no difference if turned on the ground lift. I also tried removed ground from both connections but same issue. If unintended voltage I would expect the same to be on both inputs on the stage box, so feel shouldn't make the issue either. Link to comment Share on other sites More sharing options...
Simon Lewis Posted July 26, 2017 Share Posted July 26, 2017 The switch might actually be the wrong type?I'm also at a church event... I'll ask FOH what switch they use Link to comment Share on other sites More sharing options...
sandall Posted July 26, 2017 Share Posted July 26, 2017 Reminds me ... one of the guys on our last show had a t-shirt: Once a venture scout, always a pyromaniac. My venture scouts had more trouble with axe-heads & hands in close proximity (never follow an axe up a ladder) Link to comment Share on other sites More sharing options...
Chrisso86 Posted July 26, 2017 Author Share Posted July 26, 2017 Never give a young scout an axe. Spoke with people at event I'm at, NSN in Stafford, they use the Hotshot DM1 also usually. The switch is good and works ok on non digital multi, wondering about remoting in and seeing if firmware may help. Link to comment Share on other sites More sharing options...
timsabre Posted July 26, 2017 Share Posted July 26, 2017 The other thing you could try is a couple of resistors (10k ish) down to ground at the end of each cable leading to the stagebox. If some floating voltages are appearing there, that'll get rid of them. Link to comment Share on other sites More sharing options...
cedd Posted July 26, 2017 Share Posted July 26, 2017 Just to clarify, do both of the outputs of this switch go to the stage box (and then the IEM signal find its' way to them IEM's via desk routing) or does one go directly to the IEM system's input and one to the stage box? If it's the latter then try sending both outputs of the switch to the stage box (take the IEM feed to a spare channel), then route this input directly to a stage box output in the REAC patchbay (it's possible to route inputs direct to outputs with the Roland kit). You can make gain adjustments by going in to the REAC config page on the desk - forget exactly where, but it's definitely possible to do pre amp gain without having the input patched to a desk channel. You'll need to then pad down the line output going to your IEM system - don't try doing mic in and expecting mic level out, you'll need to use the pre amp on the mic input. Now both your switch outputs are going to the same stage box, so the same ground potential. The stage box is buffering your IEM system from your switch, so if all is good with the switch you should have silent switching. I'd put money on it being the ground on the IEM system that's causing the issue. Link to comment Share on other sites More sharing options...
timsabre Posted July 26, 2017 Share Posted July 26, 2017 He said in post 3 that both switch outputs are going directly to the stagebox. So it is a bit mysterious. Link to comment Share on other sites More sharing options...
Chrisso86 Posted July 26, 2017 Author Share Posted July 26, 2017 Indeed, both outputs go to stagebox. No phantom power No difference with ground switch. Both go to desk as the mic needs to be leveled to different aux outs and the FOH mix when not pressed. Only thing is possible power going through the inputs even when phantom off. Wonder if something to do with the preamps being in the stagebox? Link to comment Share on other sites More sharing options...
Simon Lewis Posted July 26, 2017 Share Posted July 26, 2017 1501084898[/url]' post='553269'] Spoke with people at event I'm at, NSN in Stafford, they use the Hotshot DM1 also usually. Ah... Pop by the late night venue and say hello! Link to comment Share on other sites More sharing options...
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