As an audio mixer supplier, I'm often asked about the best ways to use a sub - mixer with an audio mixer. This combination can greatly enhance your audio setup, providing more flexibility and control over your sound. In this blog, I'll guide you through the process of using a sub - mixer effectively with an audio mixer, sharing some tips and best practices along the way.
Understanding the Basics: What is a Sub - Mixer?
A sub - mixer, also known as a subgroup mixer, is a smaller mixer that can be used in conjunction with a main audio mixer. Its primary function is to group and control specific audio sources separately before sending them to the main mixer. This allows you to manage complex audio setups more efficiently. For example, in a live concert, you might use a sub - mixer to group all the drum microphones together. This way, you can adjust the levels, EQ, and effects of the drums as a single unit before integrating them into the overall mix.
Why Use a Sub - Mixer with an Audio Mixer?
There are several compelling reasons to use a sub - mixer with an audio mixer. Firstly, it provides additional input channels. If your main audio mixer has a limited number of inputs, a sub - mixer can expand the number of audio sources you can handle. For instance, if you're recording a large orchestra, a sub - mixer can help you manage the multiple instruments and microphones.
Secondly, a sub - mixer allows for more precise control. You can fine - tune the audio for specific groups of sources without affecting the rest of the mix. This is particularly useful in live sound situations where you need to make quick adjustments to a particular section of the performance.
Finally, it simplifies the mixing process. Instead of having to deal with a large number of individual channels on the main mixer, you can group related sources on the sub - mixer and then treat them as a single entity on the main mixer.
Choosing the Right Sub - Mixer
When selecting a sub - mixer to use with your audio mixer, there are several factors to consider. First, look at the number of input channels. Make sure it has enough channels to accommodate the audio sources you want to group. For example, if you're planning to group all the guitar amps in a band, you'll need a sub - mixer with enough inputs for each guitar.
Another important factor is the type of connections. Ensure that the sub - mixer has the same type of connections as your main audio mixer. This includes XLR, TRS, and RCA connections. For high - quality audio, XLR connections are often preferred as they provide balanced audio signals, which are less prone to interference.
You might also want to consider the features of the sub - mixer. Some sub - mixers come with built - in EQ, compression, and effects, which can further enhance the sound quality of your grouped sources. For example, the Compact Mixer is a great option for those who need a small but feature - rich sub - mixer.
Connecting the Sub - Mixer to the Audio Mixer
Once you've chosen the right sub - mixer, the next step is to connect it to your main audio mixer. The process is relatively straightforward.
First, turn off both the sub - mixer and the main audio mixer to avoid any electrical issues. Then, use appropriate cables to connect the outputs of the sub - mixer to the inputs of the main audio mixer. If you're using XLR cables, make sure to connect the pins correctly to ensure a proper signal transfer.
After making the physical connections, turn on the sub - mixer and the main audio mixer. Set the gain levels on both mixers to a low level to prevent any sudden loud noises. You can then start routing the audio sources to the sub - mixer.
Setting Up the Sub - Mixer
Before you start mixing, you need to set up the sub - mixer properly. Begin by assigning the audio sources to the input channels of the sub - mixer. For example, if you're grouping the percussion instruments, connect each percussion microphone to a different input channel on the sub - mixer.
Next, adjust the gain levels on each input channel. The gain controls the input level of the audio signal. You want to set it at a level where the audio is clear but not distorted. Use the meters on the sub - mixer to monitor the signal levels.
Once the gain levels are set, you can start adjusting the EQ and other effects on the sub - mixer. EQ allows you to shape the frequency response of the audio. For example, if the bass on the drums is too boomy, you can use the EQ to reduce the low frequencies.
Integrating the Sub - Mixer into the Main Mix
After setting up the sub - mixer, it's time to integrate it into the main mix. On the main audio mixer, select the input channels that are connected to the sub - mixer. Adjust the gain levels on these channels to match the overall level of the mix.
You can also apply additional effects and processing on the main mixer if needed. For example, you might want to add some reverb to the entire group of sources coming from the sub - mixer to create a more spacious sound.
Tips for Using a Sub - Mixer Effectively
- Label Everything: To avoid confusion, label all the input channels on both the sub - mixer and the main audio mixer. This will make it easier to identify which audio sources are connected to which channels.
- Use Headphones: When setting up the sub - mixer and making initial adjustments, use headphones to listen to the audio. This allows you to focus on the details of the sound without being affected by the ambient noise.
- Make Small Adjustments: When making changes to the EQ or gain levels, make small adjustments at a time. This way, you can hear the subtle differences in the sound and avoid over - or under - adjusting.
Different Applications of Sub - Mixers
Sub - mixers have a wide range of applications in various audio scenarios. In a recording studio, they can be used to group different instruments during the recording process. For example, you can use a sub - mixer to group all the vocals in a song. This makes it easier to apply effects and adjustments to the vocals as a group.
In a live sound reinforcement system, sub - mixers are essential for managing the complex audio needs of a large event. For instance, at a music festival, sub - mixers can be used to group the audio from different stages or performance areas before sending it to the main mixing console.
In a podcasting setup, a sub - mixer can be used to group the microphones of multiple hosts. This allows for better control over the individual voices and the overall balance of the podcast.
Conclusion
Using a sub - mixer with an audio mixer can significantly enhance your audio setup, providing more flexibility, control, and simplicity. By choosing the right sub - mixer, connecting it properly, and setting it up correctly, you can achieve high - quality audio in various situations.
If you're interested in purchasing a sub - mixer or an audio mixer for your setup, I encourage you to reach out to us. We offer a wide range of audio mixers, including the Digital Music Mixer and the 4 Channel XLR Mixer. Our team of experts can help you choose the right products for your specific needs. Contact us today to start a procurement discussion and take your audio setup to the next level.
References
- "Audio Mixing Handbook" by Glenn Ballou
- "The Mixing Engineer's Handbook" by Bobby Owsinski