![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_ROLAND_US-20_GKP-4_CLONE_09.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_14.jpg)
GK QuadBox Roland US-20 and GKP-4 clone with user expandability and customization. Dual US-20 with 1 input and 4 outputs
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