Напольная акустика — Blumenhofer Acoustics Tempesta 20

The Tempesta 20 is the model Blumenhofer Acoustics calls the top expression of its Tempesta series, a line the German horn specialist first created with home cinema in mind and later positioned for stereo listening as well. It stands above the Tempesta 17 floorstander and the Tempesta Bookshelf in the range. Like its siblings, it combines a bass reflex cabinet vented toward the floor with a compression driver working into a horn for everything above the woofer band, and Blumenhofer lists high efficiency among its main properties.

Key specs that matter

Blumenhofer fits a 200 mm woofer with a P2F paper sandwich cone. At 1,200 Hz the crossover hands over to a 1 inch throat compression driver whose Mylar membrane measures 44 mm. Blumenhofer gives the frequency range as 40 Hz to 20 kHz within plus or minus 2 dB and rates efficiency at 92 dB. The nominal impedance is 8 ohm, and the speaker accepts up to 150 W RMS. Each cabinet is 1165 mm high, 240 mm wide and 346 mm deep, weighing 27 kg. The speakers are shipped one per carton, each box measuring 140 x 50 x 50 cm with a packed weight of 30 kg.

Engineering and use context

Cabinet panels are cut from 19 mm MDF, and unlike the smaller Tempesta 17 the cabinet of the 20 is internally braced. A dedicated chamber inside the enclosure holds the crossover network. Bass output leaves the cabinet through a divergent bass reflex tunnel that Blumenhofer says is optimised for resonance and flow, with the opening pointing at the floor. The maker lists a flat impedance curve among the features of the model. Adjustable spikes are supplied for the base. Walnut and Dark Walnut are the finishes listed for this speaker, and Blumenhofer notes that its workshop can produce true wood veneers whose colour and structure will vary with the timber. The warranty runs for five years.

Pairing

Blumenhofer rates the Tempesta 20 as tube friendly, placing valve amplifiers among the partners it supports. Its gold-plated tellurium copper posts are provided as a double set, meaning the woofer section and the horn section can receive separate cable runs or be driven in a bi-amping setup. For home cinema, the company names the Center 20 and the Center 17 as centre speakers intended to accompany this model.

Alternatives

The Blumenhofer Tempesta 17 is the entry floorstander of the Tempesta line, built around a 170 mm Peek-carbon woofer with 90 dB efficiency and a 16 kg cabinet.