- Bogen 2 ft x 2 ft drop-in speaker- 70V/25V, 4W transformer (4, 2, 1, .5, .25 watt) taps; selected by rotary switch- 8" main speaker cone with 10 oz. magnet, plus secondary high frequency cone- Front-mounted, recessed volume control available (VR)BGCSD2X2VRU