Mackie SP400C instruction manual Installation with Rigid Conduit

speaker connector (8) to the 4-pin terminal. Tighten the strain relief screws to secure the speaker cable or flexible conduit. Close the terminal cover plate (7) and tighten the locking screw (7a) firmly.

Flexible

Conduit

B. Installation with Rigid Conduit 1

B1.Remove the two screws holding the strain relief

(9)onto the rear cover and remove the strain relief assembly.

	1
+
LOOP	2
THRU	+	3
	IN
	–
	IN	4
		–
		LOOP
	THRU

A3.Insert the speaker into the hole all the way, so the front baffle rim is flush against the ceiling.

Support Rails

C-Ring

Ceiling Tile

T-Channels

B2.Open the terminal cover plate (7) on the back of the SP400C. Use a threaded conduit set-screw coupler (not supplied: For 1/2" conduit, use Thomas&Betts Steel City model TC221-SC or UL listed equivalent) and insert into the opening exposed by removing the strain relief assembly.

B3.Fasten the coupler to the cover using the nut supplied with the coupler.

Threaded Conduit Set-Screw Coupler (Thomas&Betts Steel City TC221-SC

or equivalent)

					4	–
		3				LOOP
				–		THRU
	2				IN
		+
1			IN
	+
	LOOP
	THRU

A4.Turn the four attachment screws (5) clockwise until tight to secure the mounting tabs over the C-ring. DO NOT OVERTIGHTEN.

	15	30
7.5	7.5	15	30	100v
	3.7			70v

FULL	FULL
RANGE	HIGH RANGE
(16 OHMS)	PASS

B4. Insert the speaker into the hole all the way, so the front baffle rim is flush against the ceiling.

B5. Turn the four attachment screws (5) clockwise until tight to secure the mounting tabs over the C-ring. DO NOT OVERTIGHTEN.

1This method can be used with 1/2" flexible conduit by substituting a Thomas&Betts Steel City model XC241 flexible conduit fitting (or UL listed equivalent).

SP400C – 5