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SP400C – 3
4. Introduction
The SP400C is a complete two-way bass-reflex
flush-mount loudspeaker assembly designed for
ease of installation, extremely wide coverage, and
high-fidelity full-range sound reinforcement.
The SP400C is ideal for use in business music
systems and foreground/background music applications.
Installing the SP400C is simple. The one-piece
assembly includes the backcan, mounting tabs
(clamps), front baffle rim, high- and low-frequency
drivers, and our proprietary two-way waveguide based
on Mackie Designs award-winning HR824 studio
monitors. Support rails are supplied that attach to
the C-ring (included) and distribute the speaker’s
weight to the ceiling tile T-channels. A template is
also included for marking the correct cutout size.
The Phoenix-style connector on the back of the
assembly provides input and loop-through
connections for 70V/100V distribution systems, or
low-impedance operation. An easily accessible
rotary switch on the front panel selects the
appropriate tap (from 3.7 watts to 30 watts). A
second switch allows you to select among full-range
operation, high-pass (when used with a subwoofer),
and full-range low-impedance operation (16 ohms).
A plastic paint shield is provided that protects
the transducers so the front baffle rim and grille can
be painted to match the surrounding décor.
5. Product Description
1. Grille
2. C-Ring
3. Support Rails
4. Mounting Tabs
5. Attachment Screws
6. Backcan
7. Terminal Cover Plate
8. Connector
9. Strain Relief
10. Seismic Safety Tab
11. Waveguide
12. Tap Selector Switch
13. Full-range/High-Pass Selector Switch
1
2
3
4
+
LOOP
THRU
LOOP
THRU
IN IN
+–
–
3.7
7.5
15
30
70v
100v
HIGH
PAS S
FULL
RANGE
FULL
RANGE
(16 OHMS)
7.5
15
30
5. Attachment
Screws
12. Tap Selector
Switch
1. Grille
6. Backcan
7. Terminal
Cover Plate
8. Connector
9. Strain Relief
10. Seismic
Safety Tab
11. Waveguide
13. Full-Range/High-Pass
Selector Switch
4. Mounting
Tabs
2. C-Ring
3. Support Rails