Iconic Vintage Philips Motional Feedback Box Philips 544 Book shelf unit. Dimensions (WHD) 288 x 391 x 216mm Fully checked. Contacts cleaned Idle of all amps set correct. Electronic HiFi speaker box with Motional Feedback system. Exceeds DIN45500. Two built-in amplifiers; one of 40 Watts for the bass and one of 20 Watts for the mid and treble range. Total output power 60 Watts continuous. Due to the use of Motional Feedback system, very flat frequency response and absolutely pure bass reproduction from 30 Hz. Separate speakers for bass, mid, and treble reproduction. Electronic and passive crossover filter. Continuously adjustable treble filter for adapting the speaker system to the room acoustics. Connection option to any control amplifier or power amplifier. Electronic mains switch that switches the box on and off automatically. Light indication when the box is switched on. Philips Active with integrated MFB amplifier; Transmission range: 30 20000 Hz; Sound pressure level: max. 105 dB at a distance of 1 m. Automatic operating switch, modulation controlled (response time < 1 sec, release time ~ 2 min. systems: 1" tweeter, 2" midrange and 8" woofer. Contacts cleaned Fully working perfectly. Very high sound pressure. 2x rca to Din cable included 28Kg Due weight and size extra costs. Carefully insured shipped