VDSM04 – PRO MIXER FOR 3 MICROPHONES
1. Introduction & Features
To all residents of the European Union
Important environmental information about this product
This symbol on the device or the package indicates that disposal of the device after its lifecycle could harm
the environment.
Do not dispose of the unit (or batteries) as unsorted municipal waste; it should be taken to a specialized
company for recycling.
This device should be returned to your distributor or to a local recycling service.
Respect the local environmental rules.
If in doubt, contact your local waste disposal authorities.
Thank you for buying the VDSM04! This unit is designed and manufactured for mixing 3 microphones together and
send their combined stereo signals through transformer-balanced XLR outputs. The individually switchable phantom
power and low-cut make the VDSM04 a valuable tool for any sound reinforcement, musical and recording application.
Please read the manual thoroughly before bringing this device into service. If the device was damaged in transit, don't
install or use it and contact your dealer.
2. Description
• Rear panel
MIC INPUT 1-3: XLR balanced inputs for connection to any standard dynamic or condenser microphone.
RIGHT and LEFT OUTPUTS: transformer-balanced XLR outputs for connection to the next device in the signal
chain such as a signal processor or amplifier.
RIGHT and LEFT TRIM CONTROLS: screwdriver-adjustable controls to vary the level of each output.
NOTE: these controls are set at MIC level from the factory. Turning them anticlockwise increases the output level.
These controls do not affect the AUX/HEADPHONE output.
• Front panel
MIC LEVEL 1-3: these controls adjust the level of the corresponding MIC channel. The level varies from infinity
(off) to +60dB of gain (typical).
PAN 1-3: adjust the relative right/left of each channel.
PHONE/AUX: ¼" TRS jack which may be connected to a pair of headphones for personal monitoring or to an
unbalanced input of a signal processor or amplifier.
CLIP LED: indicates that clipping is about to occur or occurring in the VDSM04 circuitry. This LED begins to light
3dB below actual clipping.
POWER SWITCH: applies power to the VDSM04.
Located on the left side of the unit is the 12VDC power jack for connecting to the (included) adapter.
Located on the right side of the unit is the battery compartment which houses 2 x 9V batteries.
Also on the right side are the phantom power and low-cut switches.
3. Technical Specifications
Input Impedance
Output Impedance
THD+ Noise
Frequency Response
Max. Output Level
Max. Gain
Low-Cut
Current Draw
VDSM04
600 ohms
600 ohms
0.02%
25Hz – 16kHz (= 0/-3dB)
+14dB
+60dB
-3dB @ 100Hz
20mA
3
VELLEMAN