Loud pop when pedals on and off in BE-100 loop??

[vince3808]

Hey guys wondering if anyone here ran into this issue yet. BE-100 Ser 0089 used loop for the first time couple days ago and getting a crazy loud pop when kicking the pedals in the loop on and off? No ground issues and I know my cables are good. Doesnt do it with my Boss DD3 but I dont use that pedal very often, seems to be a problem with the true bypass higher end pedals i have. Any suggestions?

 

[RG955TT]

Noticed the same thing on mine, would like to know too...my TRex delay pops really loud, none of my other amps seem to do this.

 

[Tone Jones]

I probably won't give the proper technical explanation but in short, capacitance gets built up on the inputs of true bypass switches. The pop you're hearing is the capacitance being discharged. As an experiment, try switching the pedal on and off a few times and you'll notice the popping subsides because the repeated switching has discharged the capacitance. This is not a solution rather a verification exercise.

The solution is to either use a relay based true bypass pedal or a buffered bypass one. This should at least get rid of the popping.

 

[vince3808]

I think it is a buffer issue, I tried to kick it on and off several times and the pop was just as loud every time. There must be a pedal that will buffer at the end of the loop to put behind the bypass pedals?

 

[Tone Jones]

What are you running in the loop?

 

[vince3808]

Just a soundbox dimension reverb. Just found out it has a universal bypass option. I am going to try to put it into analog buffered mode and I am pretty confident that will fix the problem since my buffered Boss pedal does not pop. My theory is you cant use true bypass pedals in the BE-100 loops. I'll let you know if it works.

 

[vince3808]

Success! Have to use buffered effects in the loop. Unless somthing is wrong with my amp? If you place a buffered pedal in the first position in the chain you can place true bypass pedals behind it. Works fine.

 

[supersonic]

The loop is buffered.

 

[bwgintegra]

Try this, have your effects hooked up but leave the loop switch off. Turn the amp on and then off standby. Play the amp for a few minutes to let the voltage come up on the loop. Then turn the loop switch on and see if it still does it.

 

[Tone Jones]

If you use something true bypass that's relay switched instead of something that's uses a 3DP switch, I'm pretty confident there will be no popping issues. Examples of relay switched pedals are Eventide Factor-series pedals, Strymon, Line6 M-series, and I believe the TC toneprint stuff. Line vs. instrument level concerns would still need to be considered to ensure optimal signal to noise ratio but the popping should not be an issue.

 

[RG955TT]

The pedal that pops for me is my T Rx Replica which I think is relay true bypass. Still would like to get more info on this.

 

[LP Freak]

The pedal that pops for me is my T Rx Replica which I think is relay true bypass. Still would like to get more info on this.

I had the dame issue with my TG Flashback. I switched the true bypass off and it was gone.

 

[RG955TT]

So are we to assume this should be considered normal, loud pop and can't use a true bypass pedal in the loop?

 

[Tone Jones]

This behavior would not be unique to the Friedman and shouldn't be considered a design flaw (not saying you're insinuating that). This sort of thing is likely to happen when you have a hot, gained out signal building up capacitance on a 3DP switch. There are plenty of relay based true bypass options that wouldn't suffer from this issue.

 

[LP Freak]

This behavior would not be unique to the Friedman and shouldn't be considered a design flaw (not saying you're insinuating that). This sort of thing is likely to happen when you have a hot, gained out signal building up capacitance on a 3DP switch. There are plenty of relay based true bypass options that wouldn't suffer from this issue.

Agreed

 

[Nilo]

Lehle has a little thing called the DC filter. A cheap little box which eliminates DC in the audio path. With no DC in the audio path there is nothing that can build up on the switches. If you place this before all your pedals in the loop you should have pop-free switching regardless if it's true bypass or relayswitched.

 

[lehlesupport]

Lehle has a little thing called the DC filter. A cheap little box which eliminates DC in the audio path. With no DC in the audio path there is nothing that can build up on the switches. If you place this before all your pedals in the loop you should have pop-free switching regardless if it's true bypass or relayswitched.

The DC Filter should be placed right behind the pedal or unit that causes the switching pop, we have a T-R Replica here which makes no noise, but that also depends very much on the power supply and whether it´s sharing power with other pedals.

 

[RG955TT]

My Trex is on its own power supply and is first in the loop followed by a Neuaber Stereo Wet reverb,those are the only 2 things in the loop at this time.

 

[vince3808]

Just wanted to do a follow up on this. Got contacted by Rack Systems a while ago and they were very helpfull, encouraging customer service from these guys! Got some great tips and some time was put into the reply from them, the pop goes away after about 10 minutes of the amp being on and everything is silent after that regardless of true bypass or buffering. All is good, had i had a little patience I would have discovered this for myself but like many other guys I kick on and off all my board when I turn the amp on to avoid any surprises and never got past that haha.

 

[Suhr]

Hey guys wondering if anyone here ran into this issue yet. BE-100 Ser 0089 used loop for the first time couple days ago and getting a crazy loud pop when kicking the pedals in the loop on and off? No ground issues and I know my cables are good. Doesnt do it with my Boss DD3 but I dont use that pedal very often, seems to be a problem with the true bypass higher end pedals i have. Any suggestions?

Measure from tip to ground using DC on a volt meter when plugging a cord in to the send and the return jacks
There should be none. If that is good it is in the design of the pedal, it might not have a pull down resistor on the input or output.