theo minh thi cung tuy vao tui tien tung nguoi thoi.neu chon mixer co echo thi nen chon soundcaft thi echo xai rat tot.ma lai vua tui tien nua.con khong thi dung loai ko co echo thi phai them echo roi.theo minh echo detalfex cua peavey model su dung nut dieu chinh bang co thi rat hay.