The Jamo Professional 400 is a three-way loudspeaker designed for professional audio use. Manufactured between 1990 and 1994 in Denmark, this model features a closed cabinet design with seven speakers, optimized for delivering high sound pressure levels across its frequency range. The loudspeaker includes a 381 mm woofer, a 197 x 430 mm horn midrange driver, and five 86 x 86 mm horn tweeters. The unit is capable of handling a nominal power of 400 watts and music power of up to 560 watts, with an impressive efficiency of 96 dB / W / m. The frequency response spans from 25 Hz to 20 kHz, making it suitable for a variety of audio applications. The transitional ranges are set at 900 Hz and 4,000 Hz, ensuring clear sound separation across frequencies. With an 8 Ohm impedance, the Professional 400 is designed for use with appropriate amplification, ideally over 500 watts per channel for optimal performance. Additionally, its portability is enhanced by the inclusion of wheels and transport handles. The model comes in a sleek black finish and has substantial dimensions of 900 x 520 x 425 mm, weighing about 42 kg. The original price was approximately 1,400 DM.
