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Additional information
Troubleshooting
! Sometimes the problem may lie in another component. Inspect the other components and electrical appliances being used. If the problem cannot
be rectified, ask your nearest AlphaTheta Corporation authorized service center or your dealer to carry out repair work.
! This unit may not operate properly due to static electricity or other external factors. In this case, normal operation may be restored by unplugging
the power cord, waiting about 5 seconds or more, then plugging the power cord back in.
Problem
The power is not turned on.
No sound is output from the connected
device or the sound is low.
The POWER indicator (white) does not
light.
This unit does not recover (power-on)
from the standby state.
Distorted sound.
Oscillates (loud sound is output
continuously).
Sound is only output from the left
speaker.
Sound is only output from one speaker.
About trademarks and registered trademarks
! "Pioneer DJ" is a trademark of PIONEER CORPORATION, and is used under license.
! The names of companies and products mentioned herein are trademarks or registered trademarks of their respective owners.
Specifications
DM-40, DM-40-W
Model
Amplifier section
Amplifier output
Input terminals
Input impedance
Output terminals
Speaker section
Enclosure
Woofer (LF driver)
Tweeter (HF driver)
Power supply section / other
Supported voltages
Power consumption
Power consumption when waiting (standby status)
External dimensions W × H × D
Weight
! The specifications and design of this product are subject to change without notice.
! © 2020 AlphaTheta Corporation. All rights reserved.
8
En
Check
Is the power cord properly connected?
Is the connected device set properly?
Are the connection cables properly connected?
Are the terminals and plugs dirty?
Is the volume set to the proper position?
Is the power turned on?
Is the power turned on?
Are the speakers in the standby state?
Is the input signal level low?
Is the volume set to the proper position?
Is the level for input from the connected device
appropriate?
Is the volume set to the proper position?
Is the speaker cord connected properly?
Is the device connected properly?
2-Way Active Speaker
Lch: 21 W/4 W, Class AB
Rch: 21 W/4 W, Class AB
RCA × 1, 3.5 mm stereo mini plug × 1
10 kW
Headphone × 1
Bass reflex type/vinyl-laminated MDF
4 inch (102 mm) cone
3/4 inch (19 mm) soft dome
AC 110 V to 240 V, 50 Hz/60 Hz
35 W
0.5 W or less
Lch: 146 mm × 227 mm × 223 mm
Rch: 146 mm × 227 mm × 210 mm
Lch: 2.7 kg
Rch: 2.2 kg
Remedy
Plug in the power cord to an AC outlet.
Set the device external input and volume properly.
Connect the connection cables properly.
Clean the terminals and plugs before making connections.
Turn the [LEVEL] control on the front panel of this unit clockwise to increase
the volume.
Turn on the [POWER] switch on the rear panel of this unit.
Turn on the [POWER] switch on the rear panel of this unit.
Turn off the [POWER] switch on the rear panel of this unit once and then turn
it back on after a few seconds.
Increase the input signal level.
Turn the [LEVEL] control on the front panel of this unit counterclockwise to
reduce the volume.
Adjust the output level of the connected device properly.
Turn the [LEVEL] control on the front panel of this unit counterclockwise to
reduce the volume.
Connect the left and right speakers properly.
Connect the device to both the left and right input terminals.
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