Portable Bluetooth speaker weighs only 2.5 kg and is the loudest speaker in its class. It produces a clear midrange, deep bass and extended highs that are unrivalled for a speaker this size, and its multi-directional sound will immerse you in your music, indoors or out. Echoing the legacy of rock 'n' roll, Kilburn II has a solid metal grille that pays homage to the steel mesh grille found on many microphones and a guitar inspired carrying strap for easy portability. Its flush mounted corner caps and water-resistant (IPX2) design make it supremely rugged and durable. Power amplifiers: One 20 Watt Class D amplifier for the woofer. Two 8 Watt Class D amplifiers for the tweeters. Bass-reflex. SPL: 100.4 dB SPL @ 1 m. Frequency range: 52 - 20,000 Hz. Wireless connectivity: Bluetooth 5.0 aptX. Wired connectivity: 3,5 mm input. Top panel controls: Bass control knob, Battery indicator, Bluetooth button, Power/volume knob, Treble control knob. Battery: Built-in, rechargeable Li-ion battery. Play time: 20+ hours. Charging time: 2,5 hours. Package included: Kilburn II Portable Stereo Loudspeaker, mains lead, manual. Dimensions: 243 x 162 x 140 mm. Weight: 2,5 kg. Colour: Black