- Sirus Quad B 823 MKII- professional bodypack transmitter; compatible with Sirus Quad R 823 # 502806; Mini-XLR 3-pin (TQG) connector (compatible to the t.bone and AKG); synchronisation with receiver via Infra-Red; frequency band: 823-832 and 863-865 MHz; frequency range: 40 Hz - 18 kHz; THD: EUR 68.00 - See more - Buy online