Manual

Instruction Sheet
IS-MA60/125/250
Issued: 5-1-14
Lowell Manufacturing Company
100 Integram Drive Pacific, Missouri 63069 U.S.A.
Call: 800-325-9660
Fax: [phone] Click: www.lowellmfg.com
9
Connection to
three (3)
Lowell EQ1
equalizers using
Lowell PA250
booster amplifiers
with similar and
different types of
loudspeakers.
(Similar speakers
are fed by
the same equalizer).
LOWELL
PA250
BOOSTER
AMPLIFIER
Aux In
Jack
To Speakers
Note: Jumper cords shown
are not included.
Inside of MA60, MA125, or MA250 Chassis
INTERNAL
POWER
AMPLIFIER
Power
Amp
In
RCA
Jack
To Speakers
Preamp Out
RCA Jacks
Remove Factory
Installed Jumper
Between Pre-Out
And Power Amp In
LOWELL EQ1
1/3 OCTAVE
EQUALIZER

High-Z
Input

High-Z
Output
Type 1
Type 2
LOWELL
PA250
BOOSTER
AMPLIFIER
Aux In
Jack
To Speakers
LOWELL
PA250
BOOSTER
AMPLIFIER
Aux In
Jack
To Speakers
Type 2
Type 3
LOWELL EQ1
1/3 OCTAVE
EQUALIZER

High-Z
Input

High-Z
Output
LOWELL EQ1
1/3 OCTAVE
EQUALIZER

High-Z
Input

High-Z
Output
Connection to
One (1)
Lowell EQ1
equalizer using a
Lowell PA250
booster amplifier
with similar
loudspeakers fed
by both amplifiers
LOWELL
PA250
BOOSTER
AMPLIFIER
Aux In
Jack
To Speakers
Note: Jumper cords shown
are not included.
Inside of MA60, MA125, or MA250 Chassis
INTERNAL
POWER
AMPLIFIER
Power
Amp
In
RCA
Jack
To Speakers
Preamp Out
RCA Jacks
Remove Factory
Installed Jumper
Between Pre-Out
And Power Amp In
LOWELL EQ1
1/3 OCTAVE
EQUALIZER

High-Z
Input

High-Z
Output
Type 1
Type 1
Connection to
two (2)
Lowell EQ1
equalizers using
Lowell PA250
booster amplifiers
with similar and different
types of loudspeakers.
(Note: Similar speakers
are fed by the
same equalizer).
LOWELL
PA250
BOOSTER
AMPLIFIER
Aux In
Jack
To Speakers
Note: Jumper cords shown
are not included.
Inside of MA60, MA125, or MA250 Chassis
INTERNAL
POWER
AMPLIFIER
Power
Amp
In
RCA
Jack
To Speakers
Preamp Out
RCA Jacks
Remove Factory
Installed Jumper
Between Pre-Out
And Power Amp In
LOWELL EQ1
1/3 OCTAVE
EQUALIZER

High-Z
Input

High-Z
Output
LOWELL EQ1
1/3 OCTAVE
EQUALIZER

High-Z
Input

High-Z
Output
Type 1
Type 2
SPEAKER SYSTEM CONNECTIONS
The amplifier includes a speaker output screw terminal
strip. 
the hot side to the 70V, 25V, 8W, or 4W terminals.
_
70V 25V
8W 4W
COM
+
24V DC
INPUT
Never connect an 8W or 4W speaker system (that has no 70V or 25V matching transformers) to the 70V or 25V outputs.