![GK QuadBox Roland US-20 and GKP-4 clone with user expandability and customization. Dual US-20 with 1 input and 4 outputs GK QuadBox Roland US-20 and GKP-4 clone with user expandability and customization. Dual US-20 with 1 input and 4 outputs](https://www.joness.com/gr300/pics/quadbox/GK-QUADBOX_ROLAND_US-20_GKP-4_CLONE_07.jpg)
GK QuadBox Roland US-20 and GKP-4 clone with user expandability and customization. Dual US-20 with 1 input and 4 outputs
![GK QuadBox Roland US-20 and GKP-4 clone with user expandability and customization. Dual US-20 with 1 input and 4 outputs GK QuadBox Roland US-20 and GKP-4 clone with user expandability and customization. Dual US-20 with 1 input and 4 outputs](https://www.joness.com/gr300/pics/quadbox/gk_quadbox.jpg)
GK QuadBox Roland US-20 and GKP-4 clone with user expandability and customization. Dual US-20 with 1 input and 4 outputs
![GK QuadBox Roland US-20 and GKP-4 clone with user expandability and customization. Dual US-20 with 1 input and 4 outputs GK QuadBox Roland US-20 and GKP-4 clone with user expandability and customization. Dual US-20 with 1 input and 4 outputs](https://www.joness.com/gr300/pics/quadbox/GK-QUADBOX_ROLAND_US-20_GKP-4_CLONE_05.jpg)
GK QuadBox Roland US-20 and GKP-4 clone with user expandability and customization. Dual US-20 with 1 input and 4 outputs
![GK QuadBox Roland US-20 and GKP-4 clone with user expandability and customization. Dual US-20 with 1 input and 4 outputs GK QuadBox Roland US-20 and GKP-4 clone with user expandability and customization. Dual US-20 with 1 input and 4 outputs](https://www.joness.com/gr300/pics/quadbox/GK-QUADBOX_ROLAND_US-20_GKP-4_CLONE_09.jpg)