GSM: +420 734 152 981.
Street and postal address for amp mods & service:
U Elektry 650/2, 19300 Praha 9
Company address (postal address):
Norde Systems s.r.o.
Ke Katerinkam 1403/1
149 00 Praha 4
4rockers is the registrated trademark owned by D.Samal, founder of 4rockers/Norde Systems s.r.o.