Can I use the VG-8 and another GK device (GR-30, GR-09, GI-10, Axon, etc.) simultaneously?
Yes you can. You need to invest in the Roland US-20 Unit Selector. Note to RMC Poly Drive I users, this unit needs to be modified for use with your pickups. For those able to build electronic equipment themselves, there is a DIY safe clone here. You may also use the GKP-4 GK Parallel Box, a four-units-in-parallel device. Some users have reported that the US-20 has exhibited problems with noise, whereas when they move to the GKP-4, the noise is reduced or eliminated. The difference is that the GKP-4 has no switching – every output port is always on, whereas the US-20 has foot switches to select either one or both output ports.
