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  • Connecting Looper to existing GT-100 4CM Setup

Hi All,

I am considering purchasing the RC-300 Looper pedal from Boss however a little daunted on all the cabling connections going on here.

I currently have a Marshall JVM410C paired with a Boss GT-100 using the 4 cable method through the amp and pedal's FX Loop. I don't use the amp simulation part of the GT-100 as I really prefer my amp's tone. I primarily use the GT-100 to create a simulated bass-guitar tone and some backing delay/chorus effects.

I have been enjoying playing with the looper function on the GT-100 however somewhat outgrown it and I am now planning to buy the RC-300 pedal to add to this (to me) complicated mix of things.

My question (before I go spend R 7k) is this - Would I be able to connect this into my current setup and continue as I have been without any change but using the looping functions on the RC-300 instead of the GT-100? And how would I go about doing this?

Essentially I would like to be able to select a patch from the GT-100 for some chords, change the patch to bass and put that down, then switch to something else for lead melody and play over that for example, all along with the RC-300's built-in drum loops.

Something like this here, so somehow the different FX must sound still through the power amp part of the amp (I sincerely hope that makes sense)

Incidentally (before some suggest another pedal) the reason I am buying the RC-300 (even though it is overkill like killing an ant with a nuke for what I do and where I am) is because I want the functionality that it offers (rythms, 3 tracks, 2 pedals each, midi sync etc) and don't want to sell and upgrade again later.

Thank you kindly for helping out - glad I found GFSA
    I recently just sold my RC300 (was just too big). But, basically it works that whatever comes into it it stores and plays back. But because your delays are ahead of the RC300, they will come through on all channels, as well your amps overdrive. If that makes sense?

    So, if you want a clean sound for channel 1 and a crunchy sound for channel 2, you can't use your amps dirty and clean channel, as that'll affect everything. Your delays and verbs in the fx loop of your amp will do the same.

    I couldn't tell from the soundclip you linked if the lead guitar also had all the chorus with it, if it didn't, then no, you can't do that with the 4 cable method. Then you'd have to run the GT-100 into the RC300 and then the RC300 into your amp.
      Was a quick cellphone recording grab but yes it didn't have the chorus sound in so it will be a problem.

      I appreciate the heads-up. I will then consider maybe just getting an RC-3 to play around with so that if I don't manage to find a workable solution I at least haven't lost that much.
        7 days later
        Bought it, 2 minutes, all sorted out.

        Signal Chain For Normal 4CM :
        Guitar              => Input on GT-100
FX Send on GT-100   => Amp Input
FX Send on Amp      => GT-100 FX Return
Output on GT-100    => Amp FX Return
        All sorted out by putting the RC-300 between the GT-100 and the Amp's FX Return like this:
        Guitar              => Input on GT-100
FX Send on GT-100   => Amp Input
FX Send on Amp      => GT-100 FX Return
Output on GT-100    => Input on RC-300
Output on RC-300    => Amp FX Return
        Just thought I'd post it if anyone else was interested. Get to use my amp's preamp sound, with some gt-100 patches (sometimes) for faking bass or adding chorus/delay etc and putting it all into channels on the RC-300 separately!

        Good purchase I think. Lots of floor space but probably all I'd really need.

        ?
          Yes it indeed becomes a bit large with the GT-100 next to the RC-300. My project this weekend is to figure out the Midi channel switching between the GT-100 and my amp so that I don't need the massive 5-button pedal of the JVM410 as well
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