[. . . ] Before connection, turn off the amplifier to avoid damaging the speaker system. [. . . ] ), not including front grille Finish Black foil laminated Mass Approx. â· Keep recorded tapes, watches, and personal credit cards using magnetic coding away from the speaker system. â· Be sure to install the grill net in the correct direction. Please note that room acoustics can often produce large difference in the sound for small changes in speaker placement. [. . . ] ), not including front grille Finish Black foil laminated Mass Approx. [. . . ]