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Mode Block Diagrams:
The following diagrams are excerpts from the system block diagrams and are intended to provide a simplified view of
the three operating modes of the amplifier. For more complete information please refer to the text on page 5 (items #16 &
17), and the text and/or illustrations on pages 8 – 21.
Stereo Mode:
SPA-1400/1400C Rack Mount Power Amplifier
1+
1–
CH 2
INPUTS
CH 2
LEVEL
PARALLEL
MONO
BRIDGE
MONO
CH 1
INPUTS
CH 2 OUTPUTS
CH 1 OUTPUTS
+ –
+ –
CH 1
LEVEL
CH 1
AMP
CH 2
AMP
MONO/BIAMP
OUTPUT
1+
1–
1+
1–
2+
2–
Parallel Mono Mode:
CH 2
LEVEL
PARALLEL
MONO
BRIDGE
MONO
+ –
+ –
CH 1
LEVEL
CH 1
AMP
CH 2
AMP
MONO/BIAMP
OUTPUT
1+
1–
1+
1–
1+
1–
2+
2–
CH 2
INPUTS
CH 1
INPUTS
CH 2 OUTPUTS
CH 1 OUTPUTS
Bridge Mono Mode:
CH 2
INPUTS
CH 2
LEVEL
PARALLEL
MONO
BRIDGE
MONO
CH 1
INPUTS
CH 1
LEVEL
+
+
CH 1
AMP
CH 2
AMP
1+
1–
1+
1–
1+
1–
2+
2–
MONO/BIAMP
OUTPUT
"MONO
+
"
"MONO
–
"
CH 2
OUTPUT
CH 1
OUTPUT