B&W : CM-1 (Black) The CM1 may be ideal for smaller spaces, but don’t let the size of this bookshelf speaker fool you. Thanks to the quality of its construction, it’s capable of producing a sound that’s a match for its bigger brothers. The partnership of a 130mm Kevlar® cone bass/midrange driver with a Nautilus™ tube-loaded aluminium dome tweeter helps the speaker handle musical detail with ease across the full frequency spectrum. Despite the size of the speaker, the CM1’s bass is always deep and under control thanks to the CM Series’ magnet and voice coil system technology, which keeps distortion to a minimum. The quality of CM Series drive units has made it possible to use minimalist crossovers throughout the whole range. The resulting gentle transition between drivers avoids the unnaturally rapid changes in dispersion that bedevil more complex designs, while the high quality components, carefully chosen after exhaustive listening tests, ensure that as little as possible gets between you and the sound of the original recording. All CM Series speakers come with aluminium driver trims. Grilles attach magnetically, so there are no unsightly grille-mounting features to spoil the clean lines of the speaker’s façade. For the finish, you can choose either one of two real-wood veneers in Rosenut or Wengé, or a highly polished gloss black. SpecificationsWoven Kevlar YesCrossover Tuning YesNautilus Tapering Tube YesFlowport YesTechnical features Nautilus™ tube loaded aluminium dome tweeterKevlar® brand fibre cone bass / midrangeFlowport™Description 2-way vented-box systemDrive units 1x ø25mm (1 in) aluminium dome high-frequency1x ø130mm (5 in) woven Kevlar® cone bass / midrangeFrequency range -6dB at 45Hz and 50kHzFrequency response 55Hz - 22kHz ±3dB on reference axisDispersion Within 2dB of reference responseHorizontal: over 60º arcVertical: over 10º arcSensitivity84dB spl (2.83V, 1m)Harmonic distortion 2nd and 3rd harmonics (90dB, 1m)อ่านเพิ่มเติม