SOUND TOWN M-D Series Mode Audio Amplifiers And Dsps
IMPORTANT SAFETY INSTRUCTION
1. Read these instructions carefully, pay attention to all warnings, and strictly follow the regulations to avoid product damage.
2. Do not place or install the product near water sources or expose it to liquids in any form. For example, avoid spraying liquids near the product or placing liquid containers above it.
3. Do not place or install the product near heat or fire sources, it’s recommended the ambient temperature remains below 35 degrees Celsius.
4. Do not install the product in small, enclosed spaces with poor air circulation to prevent the formation of hot air loops.
5. Before powering on, inspect the product for any physical damage, deformation, or blurred labeling. Ensure proper grounding protection measures are in place.
6. Protect the power cord and plug from deformation or wear caused by stepping or squeezing. Regularly check the power cord to ensure it is in good condition.
7. Important Warning: Power plugs and device couplers are circuit disconnection devices and must remain stable and protected during operation.
8. Follow the correct power sequence for the amplifier:
Power On: Start the pre-stage equipment first, then the amplifier.
Power Off: Turn off the amplifier first, then the pre-stage equipment.
9. Note the rated voltage marked on the product. Ensure the power supply voltage meets the product’s requirements before powering on.
10. If the input signal is connected to more than three devices, use a signal distributor to avoid signal distortion.
11. Do not connect the output of one channel to the input of another channel. Do not parallel or series connect the outputs of multiple amplifiers.
12. When designing a system with amplifiers, ensure the amplifier’s power is 50%-100% higher than the speaker’s nominal power (at the same impedance), and use bridge mode with caution.
13. Due to the high output current to speakers, it is recommended to use NL4-type screw terminal plugs that meet specifications.
14. When using multiple products, calculate the appropriate power distribution to ensure a qualified operating environment.
15. During repairs, do not connect an oscilloscope probe to the output of a bridged amplifier to avoid damaging both the product and the oscilloscope.
16. This equipment is not suitable for use in locations where children may be present.
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When stacking non-horizontally, ensure the air outlet faces upward or aligns with the vent for proper heat dissipation.
Do not place input/output cables over the product’s air vent. Secure cables on both sides of the amplifier to maintain proper airflow.
Ensure the ambient temperature remains below 35°C while running the amplifier to maintain optimal performance and extend its service life.
During project debugging, verify the internal temperature of the cabinet.
Ensure it remains below 35 C even under extreme conditions to guarantee stable operation of the equipment.
The product should be grounded.
This product is suitable for safe use below altitudes 2000m. (Only for switching power supply equipments)
This product is suitable for safe use of non- tropical climate conditions.
Do not dispose of in regular trash. Follow local regulations for recycling or proper disposal at designated e-waste facilities.
To reduce the risk of electric shock. Non- professional qualified technicians do not open top covers for maintenance.
Hot warning, do not touch the amplifier within half an hour of shutdown.
WARNING: To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.
FOREWORD
Welcome
Thank you for choosing our products. The M-D series power amplifier is specifically designed for sound systems in large stadiums, touring events, and theaters. Please take the time to thoroughly review this manual to ensure optimal performance and the best possible experience with your amplifier.
Unpacking
Please unpack and inspect your amplifier for any damage that may have occurred during transit. Confirm that the preset voltage of the power amplifier matches your local voltage rating (refer to the label on the rear panel for details). We recommend keeping all packing materials for future use in case the amplifier needs to be returned.
Important Safety Precautions
Our products have been designed with safety requirements in mind, and all finished products are tested to meet government standards before sale. Due to the presence of dangerous high voltage and current inside the unit, we strongly advise you to read all instructions, warnings, and cautions in this manual. If the product is dropped, shows dents, gets soaked, or has loose internal components, the risk of electric shock may increase. In such cases, immediately turn off the power and send the defective unit to your local distributor for service.
FRONT PANEL
Front Panel
Cleaning guide of the dust filter
The first cleaning of the strainer mesh should be performed immediately after installation.
It is recommended to clean the strainer mesh quarterly.
Do not operate the product without the dust filter, as this will shorten the product’s service ife.
Such conditions will void the warranty.
REAR PANEL (4 CH)
REAR PANEL (2 CH)
The 2-channel models have only two speaker outputs, but they are still equipped with 4 inputs / 4-ch DSP processors and can be DSP-LINK out to another amplifier.
SYSTEM CONNECTION CASE
TROUBLESHOOTING
No Response after Power on
Measure the power outlet with a multimeter or test pen to ensure if there is power available. If the power supply is normal and the amplifier still does not respond, please consult to a professional personnel.
No Signal Output
1. Check if the Signal Input Is Correct
Verify the XLR connection to ensure pins 2 and 3 are not reversed and the ground wire is securely connected. Different circuit designs may require specific XLR wiring configurations. Please follow the standard 2+ and 3- wiring convention.
2. Signal Light Does Not Illuminate
If al signal inputs are normal but the signal light does not turn on, the amplifier may be faulty.
Please consult a professional for further inspection.
3. Signal Light Is Normal but No Sound Output
If the signal light flashes normally with changes in input volume but there is no sound output, check the wiring of your Speakon cable. Ensure the $1 and $2 pins are correctly connected. Alternatively, test with another speaker cable to determine if the issue is caused by incorrect wiring or poor- quality cables/connectors.
Sound Distortion
1. Distortion at High Volume
First, reduce the volume. If distortion persists even at low volume, the amplifier may be faulty.
Please consult a professional for repair.
2. Distortion in Specific Frequency Range
Check if the loudspeaker is overloaded (typically 95~105dB). If there is a crackling sound in the mid-range, especially at low volume, it may be crossover distortion in the amplifier, which requires factory repair.
3. Distortion at High SPL
If the sound is normal at low volume but distorted at high volume, check the loudspeaker’s maximum SPL. If the clip light is on, reduce the input signal level to avoid overloading.
4. Intermittent Distortion
Check all connections between the amplifier and loudspeaker for looseness or damage. If the issue persists, it may indicate internal component failure, requiring professional servicing.
5. Environmental Interference
Ensure the equipment is placed in a stable environment, away from electromagnetic inter- ference sources.
Hum in the System
1. Hum Exists Even When There Is No Signal
Ensure the amplifier is kept away from the ground wire of the power supply cables. Connect only the live wire and neutral wire, without the ground wire. If the hum persists, it may indicate an internal issue with the amplifier. Please contact a professional for further inspection.
2. Hum Exists When the System Is Fully Connected
This is caused by different ground voltages among devices in the system, often occurring in three-phase power distribution where devices are connected to different phases. This issue is not caused by the amplifier.
Solution Suggestions (For Reference Only)
A. Unify the power supply: Connect al devices to the same distribution box if possible.
B. Ensure the ground wire potential is zero and equalize the ground wire potentials of all devices. If the ground wire itself is charged, it may be incorrectly connected to the neutral wire. Please resolve this issue.
C. If the above methods fail, you may disconnect the ground wires of all devices to reduce
AC interference. However, this does not comply with electrical safety standards, and users must be aware of the potential risks. Floating ground use is not recommended.
Maintenance Required Under the Following Conditions:
1. If the amplifier emits smoke or a burning smell.
2. If the cabinet has severe dents or deformation.
3. If the amplifier is submerged in water.
4. If internal components become loose.
5. If the AC breaker trips when the current increases.
MCONSOLE SOFTWARE
High Pass Filter (HPF on lower left of the window)
Enter the frequency value under the ‘HPF’ and select type, then press to enable the setting.
Type options: Butterworth 6/12/18/24/36/48, Bessel 12/24/36/48, Linkwitz-Riley 12/24/36/48.
Low Pass Filter (LPF on lower right of the window)
Enter the frequency value under the ‘LPF and select type, then press to enable the setting.
Type options: Butterworth 6/12/18/24/36/48, Bessel 12/24/36/48, Linkwitz-Riley 12/24/36/48.
PEQ 10 bands for input channel
Type options: PEQ/LSLV/HSLV/ALLPASS-1/ALLPASS-2/3 kinds of high/low pass, Phase, Band pass, Band stop, Notch filter;
Freq(Hz)/Q/Gain(dB): enter the value or use mouse pulley to set value; Users can also drag the frequency dot on the curve to adjust.
PEQ 10 bands for output channel
Type options: PEQ/LSLV/HSLV/ALLPASS-1/ALLPASS-2/3 kinds of high/low pass, Phase, Band pass, Band stop, Notch filter;
Freq(Hz)/Q/Gain(dB): enter the value or use mouse pulley to set value; Users can also drag the frequency dot on the curve to adjust.
Phase curve: display the phase curve of the current channel.
View: show or hide all balance control points.
Bypass: turn on or off all EQ of the current channel at the same time
Preset: save all the setting parameters of the EQ of the current channel to the computer, and recall the channel EQ parameter of the computer, which can be recalled across channels and devices.
Copy: copy the current channel EQ parameter value, which can be pasted to other similar channels (Note: input channel parameter can only be copied to other input channels).
Paste: used in combination with the copy button to paste the last copied EQ parameter value to the current channel.
Reset: reset the EQ parameter to the default parameter values.
Documents / Resources
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