Using a Boss GT100 with your Tube Amp via the 4 Cable Method - YouTube
BOSS GT-100 Amp Effects Processor GT-100Q B&H Photo Video
Second Hand Boss GT-100 w/ Flight Case & PSU - Andertons Music Co.
Roland BOSS GT 100 - Marshall JVM 205H - 4 Cable Method - Rößner-Network-Solutions
Boss GT-100 Guitar Effects Processor w/ Power Supply
BOSS GT 100 Connections with Roland GA 212 - YouTube | The 100, Connection, Boss
Amps & Effects – Ed's Guitar Lounge
GT-100 Tip: Four Cable Method - Roland Resource Centre
effects pedal - Using a looper with the 4-cable-method (4CM) - Music: Practice & Theory Stack Exchange
How to Use the Four Cable Method - Guitar Gear Finder
Signalfluß bei der 4 Kabel Methode | Musiker-Board
The BOSS GT-100 Four Cable Method (4CM) - YouTube
Guitar Pedal X - GPX Blog - Boss's GX-100 Guitar Effects Processor is its smartest Multi-FX unit yet - with Cool Touch Screen, and Blue Tooth Support Onboard
Seymour Duncan Get Wired: Four Cable Method - Guitar Pickups, Bass Pickups, Pedals