B.E.S. SM 80 Speaker System Review

 The SM 80 is the furthest down the line expansion to the line of howdy fi amplifiers made by Bertagni Electroacoustic Systems, Inc. (B.E.S.). The SM 80, the most affordable B.E.S. speaker, utilizes similar one of a kind development as the organization's different models. Its chief transmitting surface gives off an impression of being a practically level plastic stomach, generally oval in shape and estimating around 8-1/2 x 14 inches, mounted on an unbending cast-metal edge. The driving voice loop and magnet get together are suspended over the focal point of the stomach on a metal scaffold. A comparable magnet/voice-curl structure for the tweeter is mounted at the upper left of the edge. Since the front grille is dark and not removable, we were unable to see the tweeter stomach (or the front of the woofer stomach), however the magnet structures were apparent through the back grille.

Since it utilizes the radiation from the two sides of the stomachs to make a "fold over sound" quality, the B.E.S. SM 80 ought to be introduced a couple of feet before a wall. The producer recommends testing, notwithstanding, with irregular situating, for example, having one or the two speakers at right points to the audience. The SM 80's planar stomachs transmit similarly from both front and back. In its generally expected unsupported position, it has an almost omnidirectional even polar example (really, a figure-8) with yield nulls at each side. The framework's recurrence reaction is appraised as 60 to 19,000 Hz and its ostensible impedance is 8 ohms. The hybrid between the woofer and tweeter happens at 1,500 Hz.

The SM 80 stands upstanding on an oak-veneered wooden base that is 14 inches wide and 9 inches down. The speaker legitimate is 15 inches wide, 24 inches high, and 4 inches down. Its front and back are covered with dim earthy colored fabric, and the sides are done in reproduced oak vinyl facade. Every speaker unit weighs around 18-1/4 pounds. Cost: $330 per pair.

We set the B.E.S. SM 80 speakers around 3 feet from the wall behind them and 6 to 8 feet separated, however their areas didn't appear to be at all basic. The room-reaction bend was fairly unpredictable in the lower midrange, and the bass result dropped off quickly under 76 Hz. Albeit the reaction bends from the left and right speakers (estimated on hub and 30 degrees off pivot, individually) contrasted by 7 to 10 dB over a significant part of the sound reach over 1,000 Hz, they had comparative shapes. For our nearby miked woofer-reaction estimation we set the receiver at the focal point of the lower grille.

The bass reaction strongly crested at 76 Hz and dropped to a level around 10 dB lower in the 130-to 400-Hz range. Over 400 Hz it turned out to be exceptionally worn out, perhaps in view of impedance between soundwave parts emanating from various pieces of the huge bass stomach. The bass result fell steeply around 30 dB for each octave "under 76 Hz. The bass and room-reaction bends joined effectively, with some direction from our semi anechoic FFT reaction estimations. The speaker likewise had an unmistakable top somewhere in the range of 200 and 300 Hz that appeared in both the FFT and room-reaction estimations. B.E.S. provided us with reaction bends run on our test tests, and notwithstanding the totally different test conditions, they matched our own intently. From our composite bend, the reaction was dB from 270 to 18,000 Hz, with pinnacles of 10 or 11 dB at 250 and 76 Hz. The speaker's successful bass-reaction limit was around 50 Hz.