ULTRA-COMPACT, PASSIVE BASS ENCLOSURES For powerful, high-impact in-car bass, Focal has developed the ultra-compact, twin subwoofers ISUB TWIN. Easy to install under a seat and delivers outstanding performance, the twin subwoofers complement any on-board installation. The pair of ISUB TWIN passive subwoofers drastically improves the impact of the bass in an in-car audio installation, specifically thanks to the double ferrite speaker drivers and heavy-duty, tough aluminium cone. The front grilles promote optimum sound dispersion throughout the cabin. These ultra-compact subwoofers are quick and easy to install too, without any car modifications required. They slide comfortably underneath the seats and are super easy to attach, with no tools required, using the self-adhesive strips provided. However, it is also very easy to screw them to the floor if you so wish. We recommend powering the ISUB TWIN with amplifier Impulse 4.320, its two front channels will remain available to connect a pair of speaker drivers in the front doors, for example. Check the available space before installation. KEY POINTS Ultra-compact, twin subwoofers Power: 2 × 200 W High-fidelity sound Easy, invisible integration Self-adhesive strips provided Type Underseat passive subwoofers Max. Power 2 x 200W Nom. Power 2 x 100W RMS Sensitivity (2.83V/1m) 83dB Impedance 2? Dimensions (WxDxH) 101/4×91/2×31/8″ (260x240x80mm) Cone Aluminium Frequency response 50 – 150Hz Weight 5.95lbs (2.7kg) x 2 Voice coil diameter 3/4″ (20mm) Surround Butyl In order to get the best of your ISUB TWIN speakers, a running-in period must be respected to ensure they are ready for this. We recommend that, once the system is ready for listening, the drive units should be run-in with medium volume setting, with music that has the full bandwidth of frequencies (sub-bass through treble). This running-in period should last for a few weeks, to gain the full potential. After which the excellent performance of your ISUB TWIN kit can be fully appreciated.