The EMG BQS System is the full installation kit version of the BQS three-band stacked active EQ, packaged with all of the wiring components needed to fit the module into an active EMG system. The kit carries the stacked bass/treble and mid pots, the EQ circuit board, the solderless quick-connect harness, the output jack and the battery connector configured for use with EMG's active and X-Series pickup ranges. A single 9V battery powers the entire chain. The Active and X wiring presupposes that the pickups feeding the EQ are EMG active or X-Series designs sending the relatively low-impedance line-level signal those circuits produce. Players running passive HZ pickups should look at the BQS-HZ System sibling instead, which carries the load resistor network HZ pickups need to sit in front of an active EQ stage. The System version saves the player or builder from sourcing the wiring kit separately. Best suited to a full rewire of an active EMG-equipped instrument where the BQS's compact two-knob, three-band layout is the goal and the player wants the wiring kit in the same box as the EQ itself. The compact stacked-pot footprint sits well in Strat-format and offset builds where control-cavity space is tight. Three-band stacked EQ; complete installation kit included. Distributed in the UK by Selectron.