.
important. If the amplifier is not rated for the impedance load, the
internal protection circuitry of the amplifier may prevent full-power
output. Additionally, if the amplifier is not of high enough quality
or does not have good internal protection against over-load, the
amplifier may be damaged - or the speakers connected to the
amplifier may be damaged.
When you connect two speakers together so that both speakers work
off one amplifier channel, you are connecting them in parallel. Two
speakers connected in parallel do not have the same impedance as
one speaker. Knowing the combined impedance is very important
when selecting an amplifier. You need to select an amplifier that will
operate at the combined impedance and produce enough power for
both speakers. Check to make sure the amplifier you wish to use
will match this requirement. To figure out how much power you
need, just add the program power of the two speakers. The drawing
shows the combined impedance for two 8 ohm speakers connected
in parallel and their combined power requirements.
5
When the socket head screws of all four grille clamps have been
loosened, the grille may be removed. Hook the short arm of the key
through a grille perforation near a corner and pull that corner of the
grille up until the edge of the grille just clears the edge of the
cabinet. Repeat this with the other corner on the same side of the
grille. Once one side of the grille is free, the grille will spring back to
its natural flat shape. Use the key to lift the other edge of the grille
and remove the grille from the cabinet.
Note: Be very careful when
handling the grille near the cone of the woofer. A corner of the grille
can very easily puncture the paper cone of the woofer.
GRILLE INSTALLATION
The socket head screws in the four grille clamps should
still be in their loosened condition, as they were left when the
grille was removed. Pull upward on the end of each grille
clamp to be sure it has returned to its natural unclamped
position. Slide one side of the grille down between the clamps
and the side of the cabinet until the edge of the grille rests on
the face of the cabinet.
Note: Occasionally one of the clamps will engage
the edge of the grille and prevent it from seating properly on the face. If this
occurs, insert the short arm of the key through the grille about ¾” (19 mm) to one
side of the clamp. Hook the short arm of the key under the end of the clamp and
pull it up. This will disengage the clamp from the grille and allow the grille to be
pushed down until it is seated on the face.
(see drawing, next page)
10
