2
F E A T U R E S
BH Commercial loudspeakers consist of two models, the A-615-70 and
the MC-615-70. Both models incorporate metal enclosures to reinforce
bass frequencies allowing a deeper and more controlled bass response. Both
models also utilize an acoustic suspension design and offer operation in either
8 Ohm or 70 volt modes.
A powerful magnet, extended voice coil and bumped back plate give the
bass/midrange drivers high ex cur sion capability. This ensures accurate
dynamic re pro duc tion. The MC-615-70 uses a proprietary aluminum woofer
and tweeter. The special aluminum cone material combines stiff ness, low
mass and self damping prop er ties in a manner that allows virtually un col ored
pre sen ta tion of program ma te ri al. Both tweeters feature Ferro Fluid
TM
liquid
cooling to allow greater power handling.
Steep acoustic slope crossovers are used to integrate drivers. The use
of steep cross over slopes allows high power handling, minimizes driver
interaction anom a lies, and maximizes the clarity with which each driver is able
to produce its re spec tive fre quen cy band. Sophisticated computer modeling
techniques are used extensively in the RBH loudspeaker design process.
A switch connected to the tweeter allows you to custom tailor the sound to
your tastes. This switch is located next to the woofer on the front baffl e of the
speaker and has three positions: +3dB, 0, -3dB. The +3 position increases
output of the tweeter, the -3 position decreases the output of the tweeter rela-
tive to the woofer. The 0 position is the factory setting and generally provides
the most natural response from the speaker.
The use of a 70 volt transformer allows many speakers to be used
together by running a connecting wire from one speaker to the next,
without concern for the impedance seen by the amplifier. A 70 volt
amplifi er must be used to accomplish this. Please refer to the following
pages for instruction and wiring diagrams to properly install a 70 volt system.
