Xantech PA635 installation instructions Speaker Phasing, Bridged position

Model PA635 Page 11

CAUTION: After lead ends are inserted and the screws tightened down, be sure there are no free strands that could cause shorting!

Speaker Phasing

To obtain stable imaging and full bass response, it is imperative that stereo speakers be connected "in phase" with each other. You can verify this as follows:

a)If the "+" (positive) and "–" (negative) terminals on your speakers are correctly marked, and visible, and you have wired the system as shown in Figs. 6 and 7, then the system will be "in phase". No further action is required. Most manufacturers identify the positive terminal with a red binding post, a "+" sign, or a red dot.

b)If you are unsure of the markings, you can verify the phasing. Using a mono sound source, such as AM radio, alternately reverse the leads to one of the speakers. Pick the connection that delivers a solid center image between the speakers as well as best bass response.

Bridged Mode Connections

In general, it is recommended that the BRIDGED mode not be used in multi-room applications where several speakers are driven through room volume controls and the like.

For such applications use the STEREO mode. Use the BRIDGED mode for single speaker, higher power applications, such as in surround sound systems. Use speakers with an impedance rating of 8-Ohms minimum.

	Preamp Outputs
VIDEO	ZPR68, etc.

LRCA Type

Patch Cords

AUDIO
R		Set MODE
		Switch to	PA635
	1	BRIDGED position	Rear Panel

		LEFT	1	RIGHT				LEFT	1	RIGHT
	MODE				COMMON		MODE				COMMON
	STEREO						STEREO
	MONO				LOCAL		MONO				LOCAL
BRIDGED						BRIDGED

			CI GROUND STATUS IR IN
+	BRIDGED --
SPEAKER
LEFT	--	RIGHT
+		--	+

			CI GROUND STATUS IR IN
+	BRIDGED --
SPEAKER
LEFT	--	RIGHT
+		--	+

Be sure speakers are connected with correct polarity as shown.

+	–	+	–
		Wall speakers,
		shelf speakers, etc.
	Left		Right

Figure 7 – Bridged Mode Connections

© 2001 Xantech Corporation