[. . . ] [. . . ] impedance DC resistance VC diameter VC height Former Layers Wire Inductance Xmax Magnet (hxd) Magnet weight Flux density Polyglass Butyl 4 ohm 2. 9 ohm 50 mm 20 mm Aluminum 4 Copper 1. 5 mH 6 mm 120 x 25 mm 870 g 0. 8 T 8 mm 3. 95 kg 0. 31 in 8. 7 Ib 1/4 in 43/4 x 1 in 1. 93 lb 2 in 3/4 in Response curve Vented enclosure Gap height Net weight Parameters SPL (dB) 1W/1m Fs Vas Qts Qes Qms Re 39. 01 Hz 21. 43 I 0. 44 0. 51 3. 47 2. 9 ohm 330 cm2 1. 53E-07 m5/N 109. 11 kg/m4 7707. 32 ohm. ac 1. 40E-04 m/N 118. 87 g 8. 40 kg/s 717. 49 mF 23. 20 mH 19. 73 ohm 12. 87 N/A 85. 8 dB/W/m 0. 25 lb 511/16 in2 0. 75 Ft3 15 litres (0. 530 cu. ft. ) F - 3 = 33Hz / Deep and articulate bass Frequency (Hz) Sd Cas Mas Ras Cms Mms Rms Ces Mechanical Drawing Les Res BI SPL ©Focal-JMlab - SCFR050504/1 Suggested application Load Vented Vented Unit: mm Vol 15 l 20 l 30 l Fb 51 44 36 F-3 (Hz) 46 40 33 Ql 7 7 7 Vented Focal ® is a trademark of Focal-JMlab ® 108, rue de l'Avenir - BP 374 - 42353 La Talaudière cedex - France - Tel. [. . . ] [. . . ]