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17
(8) Using the active subwoofer (DSW-3L) (D-M51DVS only)
• This unit is equipped with a high-speed protection circuit. The purpose of this circuit is to protect the speakers under circumstances such as
when the output of the power amplifier is inadvertently short-circuited and a large current flows, when the temperature surrounding the unit
becomes unusually high, or when the unit is used at high output over a long period which results in an extreme temperature rise.
When the protection circuit is activated, the speaker output is cut off and the power supply indicator LED flashes. Should this occur, please
follow these steps: be sure to switch off the power of this unit, check whether there are any faults with the wiring of the speaker cables or
input cables, and wait for the unit to cool down if it is very hot. Improve the ventilation condition around the unit and switch the power back
on.
If the protection circuit is activated again even though there are no problems with the wiring or the ventilation around the unit, switch off
the power and contact a DENON service center.
Protector circuit
• The protector circuit may be activated if the set is played for long periods of time at high volumes when speakers with an impedance lower
than the specified impedance (for example speakers with an impedance of lower than 4 Ω/ohms) are connected. If the protector circuit is
activated, the speaker output is cut off. Turn off the set’s power, wait for the set to cool down, improve the ventilation around the set, then
turn the power back on.
Note on speaker impedance
• With this unit’s speaker outputs, signals with the reverse phase of the “+” side output terminal’s signals are also output from the “–” side
output terminal.
Do not connect to a device for switching between multiple speakers (a speaker selector or audio channel selector) or connect in ways other
than described in this manual. Doing so will result in damage.
Cautions on connecting
Either twist the core wires
firmly or terminate the wires.
qTurn the speaker
terminal
counterclockwis
e to loosen it.
wInsert the cord’s
core wires.
eTurn clockwise to
tighten the
terminal.
When using banana plugs, turn
clockwise to tighten the terminal
before inserting.
Connecting banana plugs
1. Set the power switch to the “ON” position.
• When the unit’s AC power cord is plugged into a switched AC outlet on the amplifier, if the power switch is left at the “ON” position, the
unit’s power turns on and off automatically when the amplifier’s power is turned on and off.
• If the AC power cord is not plugged into a switched AC outlet on the amplifier, set the unit’s power switch to the “ON” position after turning
on the amplifier’s power. When turning the power off, set the unit’s power switch to the “OFF” position before turning off the amplifier’s power.
2. Adjust the volume using the volume adjustment control.
For details, see “PART NAMES AND FUNCTIONS”.
(9)
Removing the speaker net (SC-A3L) (D-M51DVS only)
* The net on the front of the speaker systems (SC-A3L) can be removed.
• To remove, grasp both sides of the net and pull forward.
• To mount, line up the holes in the four corners of the speaker net with the projecting pieces in the four corners of the cabinet and press in.
The red side is the “+” side, the black side
the “–” side.
To “+” side on amplifier
(copper colored core wire)
NOTE: Make sure the core wires do not
touch each other.
To “–” side on amplifier
(silver colored core wire)