Adastra ML432 1U Rack Mixer - 4 Mic + 3 Aux
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Product Information
Full details
The Adastra ML432 is a 1U rack-mountable mixer designed for installed sound systems. It is ideal for users needing versatile microphone and line-level input mixing with priority paging capabilities. Its key benefit is the flexible input configuration and integration with existing 100V PA systems. A potential caveat is its focus on professional installed sound rather than live performance mixing.
All features
| Model Part Number | 953.024UK |
|---|---|
| Brand | Adastra |
Extended Product Information
FAQs
What type of microphones can I use with this mixer?
You can use dynamic and condenser microphones. The priority mic input offers +20V phantom power, suitable for condenser microphones. Other microphone inputs accept standard dynamic microphones.
Can I connect my smartphone or tablet to this mixer?
Yes, you can connect smartphones or tablets to the stereo auxiliary line inputs using a suitable adapter cable (e.g., 3.5mm stereo jack to dual RCA).
What is the purpose of the 'priority input'?
The priority input is designed for emergency announcements or to override other audio sources. It can be linked to a line-level input or a 100V PA system, automatically muting auxiliary channels when active.
Does this mixer have individual channel EQ?
No, the Adastra ML432 features only master bass and treble tone controls for the overall output signal. Individual channels do not have separate EQ adjustments.
Can this mixer be used for live band performances?
While it can mix multiple microphones, it is primarily designed for installed sound systems and paging. It lacks advanced features for live band mixing such as individual channel EQs, effects sends, or extensive routing options.
What is the power supply range?
The mixer accepts a universal AC input voltage of 100-240V (50/60Hz) via an IEC connector, and also supports a 24V DC power input.
How do I adjust the voice-over muting sensitivity?
The sensitivity and level of the voice-over muting are adjusted using the 'Aux Muting Level' control located on the rear panel of the mixer.
Troubleshooting
No audio output
Check that all input cables are securely connected. Verify that the master volume is turned up. Ensure the correct input source is selected and its level is adequate. Confirm the unit is powered on and the correct power source (AC or DC) is used.
Hum or noise in the audio signal
Ensure all audio cables are properly grounded. Check for ground loops; try lifting the ground on one of the audio sources if necessary. Use balanced cables where possible. Ensure the unit is not placed near sources of electromagnetic interference.
Microphone not working / no phantom power
Ensure the microphone is plugged into the correct input (Mic 1 for phantom power). Verify that the phantom power switch is enabled (if applicable) and that the microphone requires phantom power. Use an XLR cable for Mic 1 if phantom power is critical.
Voice-over muting not functioning
Check that the priority input is correctly connected and receiving a signal. Adjust the 'Aux Muting Level' control on the rear panel to ensure it's sensitive enough to trigger muting. Verify that the 'Priority Input Level' is set appropriately.
Pros and Cons
Pros
- Versatile input options for microphones and line sources.
- Integrated priority paging function for announcements.
- Suitable for integration with existing 100V PA systems.
- Compact 1U rack-mount design saves space.
- Provides phantom power for microphones.
- Flexible power options (mains or 24V DC).
Cons
- Limited EQ controls (only bass and treble).
- Not designed for multi-track recording or complex live sound mixing.
- Phantom power is only on the priority mic input.
- Auxiliary inputs are 3.5mm jack, not standard 1/4" or XLR.
Setup, Compatibility & Care
Setup:
- Mount the mixer into a standard 19-inch equipment rack using the provided rack ears.
- Connect your microphone sources to the balanced 1/4" jack inputs (or XLR for mic 1).
- Connect auxiliary audio sources (CD players, media players) to the stereo RCA line inputs.
- Connect the L+R master output to your amplifier or active speakers using standard jack cables.
- For priority paging, connect your microphone to the dedicated priority input or link to an external 100V PA system as per the diagram.
- Connect the power supply via the IEC input or the 24V DC terminals.
- Adjust input levels, master levels, and tone controls.
Compatibility:
- Compatible with standard 19-inch rack equipment.
- Accepts microphone-level and line-level audio signals.
- Works with standard XLR and 1/4" jack microphones.
- Can integrate with 100V line PA systems.
- Operates on universal AC voltage (100-240V) or 24V DC.
Care:
- Keep the unit clean and free from dust. Use a soft, dry cloth for cleaning. Avoid abrasive cleaners.
- Ensure adequate ventilation around the unit, especially when rack-mounted.
- Protect from moisture and extreme temperatures.
- Refer to the user manual for specific maintenance details.