JVC SX-DW303 Operations, Additional Information, Turning On the Power-POWER Å, Speaker layout

Operations

Front view

Power lamp

Rear view

The unit automatically accommodates AC power between 110V and 240V. You do not need any setting to match the unit with your local power voltage.

Turning On the Power—POWER Å

Press the ON [ ❙ ] portion of the POWER switch.

The main power turns on and the power lamp in the front panel lights in green.

• The power lamp lights in red when the Auto Power On/Standby places the

unit into standby mode.

To completely cut off the power to this unit

Press the OFF [ ‡ ] portion of the

POWER switch.

This will disconnect the mains lead.

Adjusting the Volume—VOLUME ı

Adjust the volume output level through this unit while comparing with the sounds coming out of the main (front) speakers.

•Once you have adjusted the volume output level of this unit, you do not need to adjust it each time you use this unit. Adjusting the volume level on the connected amplifier will also adjust the volume level through this unit.

1 Turn the VOLUME knob to the MIN position.	VOLUME
	MIN
	MAX

2 Turn on the connected amplifier and start playing a source. Playback sounds come out of the main (front) speakers and this unit.

3 Adjust the VOLUME knob to obtain a well-	VOLUME
balanced sound level with that of the main	MIN
(front) speakers.
	MAX

If your amplifier is not provided with a crossover frequency setting:

1 Press out the CUT OFF FILTER button to set it	CUT OFF FILTER
to the — VARIABLE position.		VARIABLE
Now the FREQUENCY knob is activated and you		FIX
can adjust the crossover frequency on this unit.
2 Turn the FREQUENCY knob to obtain the	FREQUENCY

best matching crossover frequency with

your main speakers.	50Hz
Adjust the frequency (50 Hz to 200 Hz) while	200Hz
listening to playback sound coming out of both
the main speakers and this unit.

•If your main speakers can reproduce the bass sound well, adjust the frequency at a lower level.

•If you feel bass sounds are not sufficient, adjust the frequency at a higher level.

Changing the Phase—PHASE Î

You can change the sound phase to match your preference. Select either “NORMAL” or “REVERSE” to obtain a better bass sound.

Press in or out the PHASE button to select either	PHASE
the NORMAL position or the REVERSE position.		NORMAL
		REVERSE
• NORMAL : Normally select this.

•REVERSE : Select this when you feel the bass sound is better with this mode rather than with “NORMAL.”

Operating the Unit Automatically According to the Incoming Signals—AUTO POWER ON/STANDBY ‰

By using this function, this unit automatically enters standby mode even though the POWER switch is turned ON [ ❙ ].

Press the AUTO POWER ON/STANDBY	AUTO POWER ON / STANDBY
button to the — ON position.
		ON
		CANCEL

ı

VOLUME

Î

PHASE

‰

AUTO POWER ON/STANDBY

Å

POWER

VOLUME	FREQUENCY
MIN	50Hz		Ç
MAX	200Hz
PHASE		CUT OFF FILTER	FREQUENCY
	NORMAL	VARIABLE
	REVERSE	FIXED	Ç
AUTO POWER ON/STANDBY

ON	RIGHT LEFT/MONO	CUT OFF
CANCEL	INPUT 1	FILTER
	(LOW-LEVEL)
RIGHT	LEFT
	INPUT 2
	(HIGH-LEVEL)
	TO MAIN
	SPEAKERS
RIGHT	LEFT

POWER

OFF ON

If the volume is set at a high level before starting play, the sudden blast of sound energy can permanently damage your hearing and/or ruin your speakers.

Adjusting the Crossover Frequency —CUT OFF FILTER and FREQUENCY Ç

You can adjust the crossover frequency to determine the bass sound level this unit handles.

•Once it is set, only the sounds below the frequency come out of the built-in speaker.

When the main speakers in use are JVC’s SP-X103, SP-F303 or SX-XD33

Press in the CUT OFF FILTER button to set it to the	CUT OFF FILTER
_ FIX position.		VARIABLE
		FIX

•The FREQUENCY knob is deactivated.

•When your amplifier is equipped with crossover frequency setting, set it within the range of 100 Hz to 150 Hz.

•When your amplifier is equipped with speaker size setting, select “small.”

•If no sound comes in for about 10 minutes, the unit automatically enters standby mode. The power lamp lights in red. Then if the unit detects incoming signals, this unit starts operating automatically (the power lamp now lights in green).

If Auto Power On/Standby does not work	AUTO POWER ON / STANDBY
correctly (see “MEMO” below), press out the
AUTO POWER ON/STANDBY button to set it to		ON
the _ CANCEL position. Auto Power On/		CANCEL
Standby is canceled.

When the volume level of the amplifier is so low or the incoming signals are so weak that this unit cannot detect sounds, Auto Power On/Standby may not work correctly.

•This unit may enter standby mode even though signals are coming in.

•This unit may not start operating after entering standby mode, even though signals start coming in.

Additional Information

Speaker layout

To obtain the best possible sound from your unit:

—Place a subwoofer wherever you like since bass sound is non-directional. Normally place it in front of you.

—Place all the main speakers at the same distance from the listening position.

Left front	Right front	Subwoofer
speaker	speaker
	Center
	speaker
	Listening position
Left surround	Right surround
speaker	speaker

Troubleshooting

Use this chart to help you solve daily operational problems. If there is any problem you cannot solve, contact your dealer.

Symptom	Possible Cause			Action
Power does not come on.	Is the unit pugged in?			Plug the AC power cord firmly into the AC
				outlet.
Auto Power On/Standby does not	Signals are too weak or volume			This is not a malfunction. If this happens, cancel
function correctly.	level is too low.			Auto Power On/Standby.
No sound is heard.	Is the VOLUME knob turned to the			Turn the VOLUME knob until a suitable volume
	MIN position?			is found.
	Connections are incorrect, or loose.			Check the connections. If incorrect, redo the
				corrections.
	Audio signals through the amplifier			Increase the volume level on the amplifier.
	are extremely weak.
Sounds fluctuate (suddenly become	The built-in protective circuit is			Lower the volume level on the amplifier so that
loud or soft).	working.			the symptom will not occur.
Suddenly no sound comes out.	The VOLUME knob on the rear is			Turn down the volume, then turn off and on this
—the power lamp lights in red.	set to a very high level.			unit.
Suddenly no sound comes out.	The volume of the playback source			Turn down the volume of the playback source,
—the power lamp still lights in green.	is too high.			turn off and on the source, then adjust the
				volume properly on the source.
Specifications
	Type	:	Powered Subwoofer
			Bass-reflex type, (magnetically shielded type)
	Speaker unit	:	16.0 cm cone (⋅ 1)
Frequency range		:	30 Hz to 200 Hz
Input impedance		:	50 kΩ (LOW-LEVEL), 470 Ω (HIGH-LEVEL)
Input terminals		:	INPUT 1 (LOW-LEVEL), INPUT 2 (HIGH-LEVEL)
Power requirements		:	AC 110 V –240 V	, 50 Hz/60 Hz
Output power of built-in amp		:	100 W (45 Hz, 4 Ω, 10 % THD)
Power consumption		:	27 W
	Dimensions	:	217 mm (width) ⋅ 393 mm (height) ⋅ 376 mm (depth)
	Mass	:	9.2 kg
	Accessories	:	Monaural audio cord (⋅ 1), AC plug adaptor (⋅ 1)