Product News April 2013 Extended Low Frequency Cone Driver BMS extends its range of ultra low distortion drivers. The new 18S450 is a very high excursion, high power 18” for use in high output subwoofers.
BMS-18S450 18" ultra low distortion woofer Features: Power Handling AES noise: Sensitivity (1W/1m): Frequency response: Voice coil diameter: Max. linear excursion:
1200 W 95 dB 20 - 200 Hz 4" (101.6 mm) Xmax ± 12 mm
Thiele-Small Parameters Resonance Frequency DC Resistance Mechanical Q Factor Electrical Q Factor Total Quality Factor Equivalent Volume Moving Mass Mechanical Complience BL Factor Effective Piston Area Max. linear Excursion Voice Coil Inductance
Fs Re Qms Qes Qts Vas Mms Cms BL Sd Xmax Le1k Le10k
Hz Ohm
L kg mm / N Tesla m m² mm mH mH
29 5.5 7.25 0.32 0.31 281 0.224 0.134 26.5 0.1213 ± 12 1.1 0.58
Recommended reflex enclosure: 140 l / 32 Hz, BRD = 200 mm / 502 mm long Mounting Information Overall diameter Mounting holes diameter Bolt circle diameter Baffle cut-out diameter Overall depth Net weight
mm mm mm mm mm kg
458 8 x 8.5 440 414 233 14.5
BMS Speakers GmbH, Rue de Gent 2, 30539 Hannover, Germany phone: +49-511-8793898, fax: +49-511-8793901 e-mail:
[email protected], www.bmsspeakers.com
Product News April 2013 Frequency Response measured 1000 W (89.4 V) 1 m in a vented box of 170 l tuned 32 Hz incl. 2nd and 3rd harmonic distortion raised 10 dB.
Impendance – 8 Ohm woofer
BMS Speakers GmbH, Rue de Gent 2, 30539 Hannover, Germany phone: +49-511-8793898, fax: +49-511-8793901 e-mail:
[email protected], www.bmsspeakers.com
