The MB Quart 650 S is a 3-way floorstanding speaker that is characterized by its impressive design and technical specifications. It features a woofer with a cone diaphragm measuring 205 mm and has a 4-ohm impedance. The midrange driver is a 50 mm supronyl dome, which has an 8-ohm impedance, while the tweeter is a 25 mm titanium dome with a 4-ohm impedance. The speaker's power handling capabilities are notable, with a nominal power rating of 100 watts and a maximum music power handling of 120 watts, with an efficiency of 90 dB/1m. The frequency response ranges from 35 Hz to 32 kHz, allowing for a wide range of audio reproduction. The crossover frequencies are set at 400 Hz for the woofer to midrange and 2900 Hz for the midrange to tweeter. The dimensions of the speaker are 266 mm in width, 860 mm in height, and 288 mm in depth, with a total weight of 20 kg. Available in a variety of finishes, including black, white, walnut, and oak, the speaker can also be customized with other wood finishes for an additional cost. The MB Quart 650 S was originally priced around 1,800 DM when it was released, highlighting its position in the premium segment of consumer audio equipment.
