Video & TV in Car. To buyers from the United Kingdom. AUDIO SYSTEM R08 FLAT EVO 8 20cm 175W flat subwoofer 4Ohm install depth: 64mm. TOP FEATURES AT A GLANCE. 20cm / 8 inch slim subwoofer. 175W RMS / 275W peak. Ultra-flat design, for maximum flexibility during installation. Membrane deflection for optimal air mass movement. Steel basket with KPC paper cone & elastane surround. 1.5 / 38mm single voice coil on aluminum support. PPTA Connex centering spider. Stable flat IMPP dust cap. Solid nickel-plated push terminals. Radial pole plate ventilation, Long Life Edge (LLE) & pole core drilling. Optimized for closed housings. Installation depth: 6.4cm. Voice coil: 1.5 / 38mm. Re (Dcr): 3.2. FS (Hz): 56.4. BL (Tm): 9.89. Vas (L): 7.63. SPL (dB): 87.5. Outside diameter: 214 mm. Installation diameter: 178 mm. Magnet diameter: 120 mm. Installation depth: 64 mm. Total depth: 79 mm. Weight: 2.7 kg. 35 Hz – 120 Hz. There are no vehicle compatibilities for this article. Some of our customers reviews.