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SECTION II
SETTING UP THE SYSTEM
SOUND SYSTEM CONNECTIONS
The SRA 200 is a stereo (two channel) amplifier and
special care must be taken in setting it up. The unit
contains two channels of power amplification, and
offers some special connections which may be ad¬
vantageous under certain conditions. The normal
set-up and some of the special connections are de¬
tailed in this section.
Speaker Placement
(Fig. 3)
In order to minimize feedback in a typical stage
set-up the speakers should be placed forward of the
microphones. The speakers should be used in their
normal up-right position (not turned on their sides) in
order to take advantage of their inherent directional
quality.
SPEAKER CONNECTION
Each output channel of the SRA 200 is designed for a
minimum total load impedance of 8 ohms. If the total
impedance of the speakers on either channel output
is less than 8 ohms the amplifier may be overloaded
and cause the corresponding channel's speaker
fuse to blow. For example; at high volume, overload
might occur if two 8 ohm speakers were plugged into
one channel's pair of output jacks (a parallel connec¬
tion resulting in a load impedance of 4 ohms), or, if
only one 4 ohm speaker were used. Connect the
speakers to the power amplifier using #18 AWG or
larger unshielded wire. "Zip Cord" is suitable for this
purpose. For long runs of speaker cable (over 25
feet), #16 AWG or larger wire is recommended.
While use of a shielded guitar cable to connect the
speakers will not damage the equipment, a loss of
volume or damage to the shielded cable may result.
Choose only high quality
Va"
phone plugs, and
check the cables for possible short-circuits; an inter¬
nal short-circuit or a cracked phone plug insulator
might blow a fuse in the power amplifier.
Stereo Program Connection
(Fig. 4)
The conventional stereo program system setup is
illustrated in Figure 4. In this connection the program
outputs of a conventional stereo mixer are fed to the
corresponding channel inputs of the SRA 200.
Channel outputs of the SRA 200 are then connected
to their corresponding speakers. The speaker on the
left side of the stage should be connected to one of
the left speaker output jacks on the back of the
amplifier.
The speaker on the right side should be connected to
one of the right speaker output jacks.
3
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