RBH Sound MC SERIES - Manual (Page 3)

Care and Cleaning
To maintain speaker appearance, we recommend an occasional application
of furniture grade polish to the wood surface of the cabinet. To clean dust from
the grille cloth, use a vacuum with a brush attachment.
Features
At the heart of the MC Series loudspeakers is a proprietary aluminum cone
bass/midrange driver (speaker). The unique aluminum cone material combines
stiffness, low mass and self damping properties in a manner which allows
virtually uncolored presentation of program material. A powerful magnet,
extended voice coil and bumped back plate give the bass/midrange driver
high excursion capability, which ensures accurate dynamic reproduction. The
drivers are shielded by using a steel cup and an additional magnet to cancel
any stray magnetic field which may cause interference with video equipment
such as tube televisions.
For high frequencies, a proprietary aluminum dome tweeter was developed.
This tweeter uses Ferro Fluid ® liquid cooling, allowing the tweeter to handle
greater power while retaining detail and accuracy.
Steep acoustic slope crossovers are used to integrate drivers. The use of steep
crossover slopes allows high power handling, minimizes driver interaction
anomalies, and maximizes the clarity with which each driver is able to produce
its respective frequency band. A polyswitch, or current limiting device, is used
in the crossover to prevent damage to the tweeter if overdriven.
Cabinets are constructed of ¾-inch medium density fiberboard due to its inert
properties, thereby preventing sound coloration due to cabinet diffraction. The
thickness of the front baffles also prevents excess acoustic radiation. Large
oversized gold binding posts ensure a good electrical contact. Sophisticated
computer modeling and measurement techniques are used extensively in the
RBH loudspeaker design process.
Attaching Speaker Wires
When attaching speaker wire to the terminals, it may become necessary to
remove the black and red plastic protective inserts. To do this, loosen the
binder nut from the post by twisting counter-clockwise until the nut is removed
completely from the post. Remove the plastic inserts by pulling straight out.
Replace the nut on the post by twisting clockwise. A hole is then provided
in the top of the post to allow for banana type jacks to slide into. The nut is
tightened until the wire is secure. Remember to strip the insulation from the
wire prior to inserting the wire into the post. Repeat for the other speaker
wire(s) as necessary. (See illustration on following page).