Clarion iDXZ775USB Compensation of frequency characteristics, Q curve, Setting P.EQ, English

Basic Operations

●Compensation

There is no need to compensate frequency characteristics if they are flat (no peaks or valleys) when you have measured the frequency characteristics with a measuring device. However, sometimes the frequency characteristics rise or fall in some places. If this happens, the frequency characteristics must be compensated. Create a frequency curve having characteristics that are opposite to the center frequency of parts where the characteristics rise and fall to cancel out these peaks and values, and make the frequency characteristics as flat as possible.

Making the frequency characteristics as flat as possible is called “Compensation”.

On this unit, frequency characteristics can be compensated by P.EQ (Parametric Equalizer).

●Compensation of frequency

characteristics

The figure below shows the relationship between the center frequency, gain and Q curve.

Level			Q curve(Q)
(dB)						F
					Q =
						f
Gain			3d	B
		f
				Frequency
				curve
	Center				Frequency
	Frequency (F)				(Hz)

●Q curve

The Q curve becomes sharper when the numerical value is increased, and smoother when the numerical value is decreased.

Flat frequency characteristics can be made by selecting a Q curve opposite to that of the curve to be compensated.

Q curve : 20 Q curve : 1

●Setting P.EQ

P.EQ (Parametric Equalizer) allows you to compensate the entire frequency level range in detail by smooth curve using frequency compensation matched to the type of your car.

The item corresponding to the system set in the section “Selecting speaker system” (page 10) will be displayed.

2-1.	Select “P.EQ”.
3-1.	Press the [	] button.

When speaker system is “NORMAL”:

3-2. Push the [SEEK PANEL] leftward or rightward and select from:

“SEDAN-1”↔ “SEDAN-2”↔ “MINI VAN-1”

↔“MINI VAN-2”↔ “WAGON” ↔ “USER”...

P.EQ basic menu

No.	Display name	Speaker Mounting
		position
1	SEDAN-1	Front: Front door
	(sedan-1)	Rear: Rear parcel
2	SEDAN-2	Front: Front door
	(sedan-2)	Rear: Rear door
3	MINI VAN-1	Front: Front door
	(mini van-1)	Rear: Luggage (side)
4	MINI VAN-2	Front: Front door
	(mini van-2)	Rear: Rear door
5	WAGON	Front: Front door
	(wagon)	Rear: Luggage (side)
6	USER (user)	User preference

3-3. Press the [OPTION] button.

3-4. Press the [MENU] button and select from:

“BAND1” ➜ “BAND2” ➜ “BAND3” ➜

“BAND1”...

3-5. Push the [SEEK PANEL] leftward or rightward and select from:

•FRONT (Front speaker)

•FREQUENCY (Frequency) (20 Hz to 20 kHz)

•GAIN (Gain) (–12 dB to +12 dB)

•Q (Q curve) (1, 3, 5, 7, 20)

•REAR (Rear speaker)

•FREQUENCY (20 Hz to 20 kHz)

•GAIN (–12 dB to +12 dB)

•Q (1, 3, 5, 7, 20)

•FRONT

English

DXZ775USB 13