User manual B&W DM 570

[. . . ] [. . . ] DM 57070 Stand-mount/Bookshelf loudspeaker system Product Summary q The DM 57070 is the successor to the D5 which in recent years has earned a worldwide reputation for out-performing many loudspeaker systems. q The DM 57070 has extremely low system resonance and `Q' typically a system resonance of some 53Hz and a "Q" of 0. 7 - figures that would do credit to loudspeakers four times its size. Technical highlights q The bass/midrange unit has been redesigned using new suspension materials, and by a small increase in the enclosure volume of the D5. q The improvements are of vital importance in the useful extension of low frequency performance and allowing the unit to be tightly coupled in a room by wall mounting or by fitting in a bookshelf. Drive Units 1 x TW20 high freqeuncy unit voice coil diameter 19mm 1 x 140mm bass/midrange unit; voice coil diameter 26mm Nominal Impedance 8 ohms Power Handling Dimensions 10W ­ 25W Height: 455mm Width: 227mm Depth: 241mm Finish Standard: teak or walnut Special: satin white or selected veneers of walnut, teak or rosewood Frequency Response 100Hz ­ 20kHz. ± 5dB, Sensitivity 6. 8 watts into nominal impedance (i. e. [. . . ] [. . . ]