Nady Systems SPA 1400 - Manual (Page 7)

The following instructions describe the most common ways to install your amplifier into a sound system.
1. Turn off the amplifier power switch before making any connections.
2. The SPA Series amplifiers maybe operated in one of three modes (stereo, bridged-mono, and parallel mono).
Refer to the following wiring diagrams for the speaker connections you wish to make.
(Note: Nady Systems assumes no liability for damaged speakers resulting from improper wiring, careless amplifier
use, or over powering.)
• Stereo (Two-Channel) Mode
To put the amplifier into stereo mode, first turn the amplifier off, then slide the mode selector switch (13) to the center
“STEREO” position, and properly connect the input/output wiring as shown.
(Note: Do not connect a speaker load less than 2 ohms as it can damage your amplifier.)
8
CONNECTIONS
CHANNEL B
CHANNEL A
CHANNEL B
PIN 1+ +
-
PIN 1-
CHANNEL A
PIN 1+ +
- PIN 1-
(Note: You can also connect
both channel outputs to the
Channel A Speakon™. Ch A
Pin2+ = ChB Pin1+ and Ch A
Pin2- = Ch B Pin1-)
1 2
3
2 1
3
Ground (Screen)
Cold (-)
(Out of Phase Signal)
Hot (+)
(In Phase Signal)
MICROPHONE INPUTS
Socket (female) Plug (male)
UNBALANCED USE OF
MONO 1/4” PLUGS
Tip =
Signal
Sleeve =
Ground/Shield
Tip
Sleeve
Strain relief
clamp
BALANCED USE OF
STEREO 1/4” PLUGS
Tip =
hot (+)
Ring =
cold (-)
Sleeve =
Ground/Shield
Tip
Ring
Sleeve
Strain relief
clamp
Input Wiring Tips