Compact, rugged, and efficient, the MX401 Four-Channel Stereo Mixer from Rolls is a deceptively flexible analog audio mixer designed to make mobile sound setups and field recording hassle-free. The unit features four channels of XLR audio input and balanced stereo XLR outputs, with all XLR I/O featuring individual mic/line level selection. The MX401 also sports level control for each input channel, master gain control, an extra 3.5mm stereo output for headphones or as an aux send, and 15V of phantom power selectable for each input. Crucially, the MX401 can not only run off of the included 15 VDC power supply, but also on two common 9V alkaline batteries for completely mobile, outlet-free operation.

4 x Balanced XLR Inputs    Selectable Phantom Power per Input    Balanced Stereo XLR Outputs    Selectable Mic/Line Level for XLR I/O    3.5mm Stereo Output    15 VDC Power Supply or Two 9V Batteries

• Four balanced XLR input channels with mic/line selection 
• Level control and stereo pan control per channel
• Balanced stereo XLR outputs provide a stereo feed for monitors, PA system, or audio interface 
• Selectable mic/line level for each XLR output
• Flexible unbalanced 3.5mm stereo output for headphones or record send
• Main output gain control with clip indicator 

The MX401 features two options for power, including a standard 15 VDC power supply (included) and the ability to run on two 9V alkaline batteries, placed in dedicated slots on the side. This ensures the MX401 can perform well in either a fixed position setup or a mobile setup, such as a field recording system. The unit also comes with selectable 15V phantom power, allowing individual selection of powered inputs.

Related Questions and Answers

Q: 1. I have a roku, fire box, and a cable box rca audio to a reciever. I have what I think is the same. I have to get up and manually change sources. Will this do what I want automatically. Also there is sound comming out of these things most of the time, is that a problem?

A: Yes, it will combine all four sources into one output. I use it to combine multiple karaoke units and wireless microphones so it would be one source on receiver. It isn't powered so doesn't matter if it has audio sending to it all the time. If you have two sources going at the same time though, you will hear both. It does not automatically switch, it just combines. So this probably won't be what you want. You will have to change sources anyway to switch the video input between devices. I would get a new receiver that has an app for remote control.

Q: 2. Why are there two outputs for the mono? Do you still hook up to your subwoofer with a single sub cable on either of the two mono outputs?

A: On the Rolls SX45 - 2-Way Stereo Crossover. One is for the crossover for the speaker highs to lows. The other is a separate mono out to a sub.

Q: 3. What is the recommended ohm headphone to use?

A: The HeadAmp4 is powerful enough to support most consumer and pro headphones which typically range from 32 to 600 ohms.

Q: 4. Does this work over seas

A: The included 12 VDC supply is 120 VAC 60 Hz only. It is not compatible with most electrical systems outside North America.

Q: 5. If I input a 3.5mm mic will that get phantom power, and if so, how much, or is it just through the XLR connections?

A: Phantom power is provided through an XLR connection only. Mics that require power with a 3.5mm jack usually require plug in power which is approximately 2 - 5 volts. The MX310 is not able to provide this power.

Q: 6. I'm looking for blend a piezo pickup and condenser mic both mounted on double bass. Does this will works?

A: It might. Give it a try. It is a returnable item.

Q: 7. Can this be used in car audio for multiple subwoofer amps .all aready the same wattage

A: This is not the right device for what your likely trying to accomplish. In car audio your generally trying to split or repeat the same signal. This is designed to take signals from multiple sources and send to a single output. Although not recommended, you could achieve the same results using an RCA Y-adapter.If your that serious about car audio you should be using a electronic crossover with multiple outputs or high-end deck that supports multiple RCA pairs.

Q: 8. do you need power for the mixer to work?

A: Yes it comes with a power supply.

Q: 9. Can this be used to control volumens and outputs to different zones like attenuators such as the AT 100D? And if so, in what other ways would make it better?

A: Thank you for your question. This unit has four stereo rca inputs with separate zone selector switches for each of the 4 zones. you can control the input and output volume from each channel and zone.

Q: 10. 2 Qs: 1) Does this add any coloration to the signal; 2) will this work passively while it is powered down? One of the mics I'd be running through it is a Warm WA 47, which doesn't need the phantom power. I want to be sure that I can either go through the powered-up Rolls without it affecting the signal, or turn the Rolls off and just pass through it in passive mode. Sorry for the complicated and poorly phrased question!

A: The Rolls MX310 MorMics 3-Channel Mic Mixer/Combiner requires a power supply to function and is not passive. It does not specify any features that would color the signal specifically, however most electronic circuitry will typically influence the audio signal in some manner, typically minimally.