Backes&Muller BM30
¥ 6,000,000 (a set of two cars, around 1995)
Commentary
This is a flagship model of active speaker from Backs & Mueller.
The Bucks & Mueller active speaker system incorporates feedback that compares the input and output signals to compensate for distortion, including the physical vibration of the enclosure.
The low-mid range unit uses inductive negative feedback, which corrects the voltage generated between the sensor attached to the diaphragm and the magnetic field of the unit by comparing it with the original signal, while the high-range unit uses capacitive negative feedback, which compares the voltage between the diaphragm and the grid with the original signal.
The BM30 is a 5-way 8-unit configuration with two 25 cm cone woofers in the low band, two 20 cm cone mid-bus units in the middle band, two 13 cm cone mid-range units in the middle band, a 3.7 cm dome tweeter in the high band, and a 1.9 cm dome super tweeter in the ultra high band.
Model Rating
| Method | Built-in Amplifier / 5-Way / 8-Speaker Floor Type |
| Speaker Unit | |
| Units Used | For low band : 2 x 25 cm cone type (with inductive feedback system) Medium and low band : 2 x 20 cm cone type (with inductive feedback system) For Medium Range : 2 x 13 cm cone type (with inductive feedback system) For High Range : 3.7 cm Dome Type (with Capacitive Feedback System) For Super High Band : 1.9 cm Dome Type (with Capacitive Feedback System) |