Setting Analog Input Levels, Is now set

SETTING ANALOG INPUT LEVELS

1.	Install DEQ 30 into your system.
2.	With your source unit volume control set at a low
	position, test the function of the system. Once
	satisfied proceed to the next step.

COM

POW

REM	GND

DIGITAL TOSLINK

3.	Turn the gain controls of the DEQ 30, your
	amplifiers and other components in your system
	to their minimum positions.
4.	Cue up the reference CD to the track with the 1
	kHz test tone at “all bits high”. This is also
	referred to as ”0dB.” If you do not have a CD
	player, see Non CD Setup.
5.	Set your volume on your source unit to 3/4
	volume.
6.	Slowly turn up the gain controls on the DEQ 30
	until you can hear the pure tone. HINT! The
	lower the initial volume the better.
7.	Turn up your volume of your source unit until the
	output of the pure tone becomes distorted
	(sounds like fuzziness in the tone) and then turn
	back down until you hear a pure tone again. The
	maximum undistorted output of the source unit
	is now set.

C OS/

OAX

	OUT
		A
		NA
	IN	LOG
A	IN
	NAL
DIG OG/
	ITAL	CO
		CO
		AX
		L

OUTPUT

RCA

L	AN
		ALO
		GI
	B	NP	UT
R	B	ALA	UT
		ALA
		NC
RCA		ED
RCA			IN
	L		IN
	L		A	PU	T
				DJ	T
		R		UST

Absorption/Reflection Related Non-Linearity Problems are caused by the interaction of speakers with the interior acoustics of the vehicle. Examining the speaker mountings and locations may give clues to potential problems and potential solutions. Be sure the speakers have an un-obstructed path to the listening position. Any object in the speakers path will affect the sound quality of the system.

Non-Equalizer Solutions

Examine the surrounding of the speaker. If any object blocks the path of the speakers remove it. If this is not possible, minimize the effect of the obstruction by applying a type of absorption material on the object like felt or high density fiberglass. Install the absorption material in the path between the speaker and the obstruction so as to minimize the effect. If the rear of the speaker (midrange or woofer) is close to a reflective panel, place damping material between the speaker and the reflective baffle. Also if any frequency response errors occur near crossover points, try changing the speaker polarity of the speaker or try using different crossover frequencies.

Equalizer Solutions

Use the DEQ 30 first as a cut only device to try to smooth out the non-linearity of the system. Cut frequencies gradually starting with the center point of the problem area. Do not cut the centered band to get the frequency response to the flat position for it will dip below when you change adjacent bands. When boosting the DEQ 30 is required, take care not to exceed the maximum undistorted output level of the DEQ 30. For reference, an illuminated “Clip” LED indicates that the maximum output level has been exceeded. Periodically listen to your system during this process to make sure that the changes improve the system’s advanced equalization.