SYNERGY Bogner Uberschall DUAL CHANNEL ALL-TUBE MODULEThere was no way Synergy wasnt going to get Reinhold Bogner to re create his classic metal machine in a Synergy module format. And thats precisely what hes done. By slipping the Synergy berschall preamp module into your Synergy rig, youll unleash the same aggressive tones and impeccable response as the original amplifier. Reinhold even took it a step further with the addition of Pre EQ, Boost, and Cut mini toggles to further shape your ideal tones.