Parasound Halo C1 Controller manual Level and Distance Autocalibrate

ADJUSTMENTS, MENUS, AND SETUP continued 31

Level and Distance Autocalibrate

First, prepare the calibration microphone supplied with the C 1, by unscrewing its barrel to open the battery compartment, inserting the AA battery supplied with its + (button) end toward the switch, screwing the barrel back on, and pushing the microphone’s On-Off switch toward the dot.

C o n t r o l l e r

			Autocalibrating
			Please	wait
		Speaker Level
Phones Cal Mic	Mute Dim	Ref. Level:		Left
		Noise Level:		-29.5dBr
		Press	Exit key to
		abort	autocalibration

C 1

THX SURROUND EX Status Menu

7 . 5 C H A N N E L

E N H A N C E D

S U R RO U N D

On-Off Zone Zone Display Main Source Surround

Plug the microphone into the “Cal Mic” input on the front of the C 1. Then sit in your favorite lis- tening chair, holding the microphone with its mesh screen pointing upward. Tilt the Master remote’s thumbpad to scroll down to the autocalibration mode you want (level or distance), press the center of the thumbpad to start the calibration, and sit back.

At the start of level autocalibration, the C 1 will briefly check the ambient noise level in your room, to make sure it is low enough for the speakers’ output to be measured properly, and will display that level on the screen. For the remaining tests, which take about 5 minutes, the C 1 will play a noise signal through each speaker in turn, starting at a very low level, then raising it until each speaker’s output reaches the THX 0-dB level. The on-screen display shows which channel is being calibrated and its output level.

Note: Autocalibration is a precision measuring and adjusting technique that requires a reasonably quiet environment. Do not move the microphone once calibration starts. And do not talk or make noise during autocalibration, especially level autocalibration, as high ambient noise or fluctuating noise levels may interfere with and interrupt the process.

If autocalibration is interrupted by extraneous noise, the OSD will ask for silence, count down for five seconds, and then resume from where it left off. It will keep try- ing to autocalibrate until it either succeeds or it gives up and displays “Exit to Abort.”

To exit Autocal, press the ESC (escape) button on the Master remote, not the Exit button on the front panel.

If the subwoofer cannot be autocalibrated after three tries, the OSD will request that you adjust subwoofer level manually, as discussed under “Level setup,” above. If the subwoofer’s level is still too high or low, adjust the gain of the inter- nal or external amplifier powering it.

At the start of distance autocalibration, the C 1 once again checks ambient noise, then plays repeated brief bursts of low-level noise through each speaker in turn. The display shows which speaker is being measured, how near completion the measurement is, and the required delay,