AKG WMS420 Instrument Wireless Guitar System Leave a Comment / Uncategorized / By Alexander / March 14, 2017 83 GEARANK 83 out of 100. Incorporating 10+ ratings and reviews. Street Price: $299.99 Manufacturer: AKG Features: Audio Bandwidth 40Hz – 20kHz 8 Channels in one Band 8 Hours operation (1 x AA battery) The Best Wireless Guitar Systems The Best Guitar / Instrument Cables The Best Wireless Microphone System Guide The Best Wireless In-Ear Monitor Systems