The Dual CL 4070 is a 3-way closed loudspeaker system manufactured around 1981 in St. Georgen, located in the Black Forest region of Germany. It features a classic design with a black finish and has dimensions of 315 x 500 x 260 mm, weighing approximately 10 kg. The speaker system is designed to handle power inputs of 90 watts nominally and 120 watts for music, offering solid performance. It has a low-frequency driver that measures 26 cm, a midrange driver at 10.5 cm, and a 2 cm dome tweeter, providing a wide frequency response from 25 Hz to 20,000 Hz. The transitional ranges are set at 900 Hz and 3,000 Hz, which help in the seamless integration of the drivers. The system accommodates both 4 ohm and 8 ohm connections with separate inputs for each, and it possesses an efficiency rating of 86 dB at 4 ohms and 87.5 dB at 8 ohms. Some of its special features include an electronic protection circuit and a 6 dB/octave crossover with a natural resonance frequency set at 70 Hz for the loudspeaker base.
