27 V1 270mm (11") Polyglass subwoofer · 50mm / 4 layers voice-coil · Polyglass cone · Zamak basket Specifications Nominal power Maximum power 250 W 500 W Sensitivity (2.83V/m) 90 dB Cone Surround Nom. 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 = 46Hz / Fast and tight bass 20 litres (0.706 cu. ft.) F - 3 = 40Hz / Punchy and dynamic bass 30 litres (1.059 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. 00 33 4 77 43 57 00 - Fax 00 33 4 77 43 57 04 - www.focal-fr.com ...