Speaker Connections - Pyramid PA105 User Manual

Connecting microphones
The MIC 1 and MIC 2 jacks permit you to connect two
microphones with 6.35mm plug.
mic1
mic2
Connecting a CD or tape player, or tuner
In this Situation, set the PHONO and AUX/CD
SELECTOR switch to the AUX/CD
Set the Switch to the
AUX/CD Position
Connecting a turntable
In this Situation, set the PHONO and AUX/CD
SELECTOR switch to the PHONO.
Set the Switch to
the Phono Position

Speaker connections

One or more speakers (4, 8, or 16-Ohm) speakers can
be connected to the amplifier with or without
transformers. However, before you connect any speaker
to the amplifier, the total speaker impedance must be
calculated in order to avoid damage to the amplifier.
A total speaker impedance greater than 16 Ohms or
less than 4 Ohms can be cause this damage to occur.
L
R CD or Tuner
or Tape Player
Turntable
GND
L
R
To begin with, in order to ensure equal volume from
each speaker, all connected speakers should have the
same impedance.
A proper total impedance with the 4 to 16 Ohms range
can be achieved by combining series and paralled
speaker connections. Please see the diagrams which
follow the same impedance.
Finally, always use the shortest length of speaker wire
possible of proper gauge. Usually, 18-gauge wire is
adequate for lengths under 25 feet, while 16-gauge is
used for greater lengths.
System 1: Single speaker system
1.Connect the speaker (-) terminal to the amplifier
COMMON terminal
2.Depending on the speaker being used, connect the
speaker (+) terminal to the amplifier's 4-Ohm, 8-
Ohm or 16-Ohm amplifier terminal.
+
_
System 2:Two (or more) speakers in series
1.Connect the LEFT SPEAKER (-) to the amplifier
COMMON terminal.
2.Connect the LEFT SPEAKER (+) to the RIGHT
SPEAKER (-).
3.Connect the RIGHT SPEAKER (+) to the amplifier's
4-Ohm, 8-Ohm, or 16-Ohm terminal, depending on
the TOTAL IMPEDANCE of the two speakers.
If each speaker has an impedance of 8 Ohms, the
total speaker impedance in this series configuration
is 16 Ohms.
4
This example shows
a 4 Ohm Speaker
+
Right
Speaker
_
This example shows a
two 4 Ohm Speakers , the
total impedance is 8
Ohms.
+
Left
Speaker
_