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Per 4 Kabel Methode den Preamp im Boss GT-10 bzw. GT-8 einschleifen Boss GT-10 / GT-8: Using the preamp of your guitar amp with the 4 cable method
Xycl » Guitar Effects » Boss GT Series » 4 Cable-Method

Boss GT-10 / GT-8: Using the preamp of your guitar amp with the 4 cable method


With the 4 cable method (4cm) you can connect your Boss GT-8 /GT-10 to your guitar amp, that you can use the preamp of your guitar amp. This is especially usefull when using a good sounding tube preamp, because then you can still use it. Another advantage of the 4 cable method is that you can switch between your built-in tube preamp and the preamp models of your Boss GT-10 / GT-8. The basic requirement for the 4 cable method is that your guitar amp has an effects loop.


  1. Wire: Guitar into the input of the Boss GT-10
  2. Wire: Effects loop send of the Boss GT-10 into the input of your guitar amp
  3. Wire: Effects loop send of the guitar amp to the effect loop return of the Boss GT-10
  4. Wire: Boss GT-10 output into the effects loop return of the guitar amp

Programming of the patch

  1. Preamp effect off 
  2. External loop on


  1. Preamp effect on
  2. External Loop off

In the first case you will use the built-in preamp of your guitar amp. Therefore the preamp model of the Boss GT-10 is switched off . In the second case the external loop is switched off (you don't use the preamp of your amp) and the preamp model of the Boss GT-10 is used.

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Showing comments 1 to 10 of 46 | Next | Last
Reply #46 on : Mon July 08, 2013, 08:55:27
if this Laney Schematic is the correct wiring diagram then the best way would be to use the clean input and the Boss GT in front of the amp.
Last Edit: July 08, 2013, 08:56:02 by Arne  
Alfredo Laranjinha
Conection of a Boss GT 10 to a Laney KD 65 combo
Reply #45 on : Sun July 07, 2013, 14:01:38
I would like to conect, simplest way as possible, a Boss GT10 efects pedal to a Laney KD 65 Combo. Is there someone that can help me? Much obliged in advance. Alfredo from Portugal
Gt-10 4-cable method to TWO amps
Reply #44 on : Fri March 15, 2013, 01:00:24
Hey, I've got a Carvin V-3 full stack and a Bogner Überschall with 2 4x12 Überkabs. How can I hook up both rigs with the 4-cable method to get a stereo effect? Do I need to get splitters with 1-way gates to prevent bleed-through between the 2 different send/return signals?
GT-10 with a Line 6 Spider III120 Combo Amp
Reply #43 on : Tue February 21, 2012, 18:42:41
my wife bought my the GT-10 for Christmas this passed year and I have searched everywhere for a solution as to the best way to hook these two pieces of equipment up to work with each other.....any advice would be greatly appreciated........thank you very much
Reply #42 on : Sun December 11, 2011, 20:32:48
I would connect the looper between GT Out and Amps FX return
add a looper?
Reply #41 on : Thu December 08, 2011, 23:10:13
I'm technically challenged: Can you diagram the 4CM as it applies to my (guitar)+(amp head)+(cabinet)+(GT-10)+(RC-20XL Loop Station)? I have an effects send/return on the amp head.
Triple Rec
Reply #40 on : Mon November 28, 2011, 11:42:31
The GT10 has only one switch. So it's not enough to switch the Triple Rec channels
triple rectifier
Reply #39 on : Sat November 26, 2011, 20:57:25
Can I use the GT-10 to switch the channels on my triple rec. or do I have to use the tap dance method which I am trying to get away from?
4CM Tonelab LE
Reply #38 on : Mon November 21, 2011, 23:29:46
Question: is the 4CM method is posible with my Tonelab LE?

I plugged it on to my AC30TB.. But when i turn te pre amp knobs on my amp it doesnt effects the sound. Only my power volume has effect...

I did like this:
Cable 1: Guitar OUT to ToneLab IN
Cable 2: ToneLab SEND to Amp IN
Cable 3: Amp SEND to ToneLab RETURN
Cable 4: ToneLab OUT to Amp RETURN

I olso used a 3 cable method:
Guitar out -> Amp in
Amp send -> Tonelab in
Tonelab out -> Amp return

With this method my amps pre amps is effective on my guitar ouput. but my pedal effects from the Tonelab like the 'wah' or 'Octafuzz' wont go trough my amps pre amps like they should for the best sound, so its not completely satisfying...

Anyone has advice for me? Thank u in advance
Aaron Napier
boss gt10 with marshall jcm 900 halfstack
Reply #37 on : Mon October 24, 2011, 20:26:01
how can I use the 4 cable method and get good sounds out of my stack?
Showing comments 1 to 10 of 46 | Next | Last

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