The MC4-A 4-Channel Media Control Mixer from OWI Inc. is a convenient installed audio control mixer intended to be mounted in a two gang electrical box for easy control of audio input levels in a classroom, showroom, conference room, or retail space. The box includes four slider controls with line or mic level selection channels three and four.

A secondary output is provided for "hard of hearing" applications in which the output signal is not affected by any changes on the front panel. Multiple input options are available including two 3.5mm TRS mini jacks on the front, two 3.5mm TRS mini jacks in the rear, and two Euroblock 3-pin inputs in the rear. Euroblock and RJ45/Cat 5 outputs are provided for particularly reliable compatibility with OWI speakers. Most inputs and outputs are solid-state and balanced, facilitating very long input and output lines if needed. For an easy to install and reliable solution for audio level control of embedded cable runs and sound systems, the MC4-A is a well equipped and highly efficient option.

For Classrooms, Showrooms, and Retail    6 Inputs Total - 4 in Back, 2 in Front    Selectable Line or Mic Level Inputs    Four Sets of Slider Level Controls    3.5mm TRS Inputs and RJ45 Outputs    Two Balanced Euroblock 3-Pin Inputs    Energy Star-Certified Power Supply    Fits on a Two Gang Electrical Box

• Six inputs total
• Four inputs on the back panel: two 3.5mm stereo mini jacks, two balanced Euroblock 3-pin
• Two 3.5mm stereo mini jacks on the front panel
• Override on front-panel inputs for channels 1 and 2 
• Selectable mic or line-level on inputs 3 and 4
• TV, DVD, MP3, computer, and auxiliary on inputs 1 and 2 
• Four sets of slider level controls for easy mixing
• Three line outputs: balanced, 3.5mm TRS mini, RJ-45/Cat 5
• Extra output B with fixed levels for "hard of hearing" applications
• 15 VDC, UL Listed Level 5 (Energy Star) power supply
• Balanced inputs and outputs for long cable runs
• Fits in a two gang electrical box (not included)
• Comes with power supply, four 6:32 truss head screws, and four plastic washers 

Related Questions and Answers

Q: 1. What cable can I use with this device to output the audio to a PC mic port?

A: Use this : https://www.bhphotovideo.com/c/product/847696-REG/Hosa_Technology_MXM_001_5_Camcorder_Microphone_Cable_XLR.html or an interface https://www.bhphotovideo.com/c/product/1479273-REG/focusrite_scarlett_solo_3g_scarlett_solo_usb_audio.html?sts=pi&pim=Y https://www.bhphotovideo.com/c/product/828586-REG/Hosa_Technology_HXP_003_HXP_003_Unbalanced_1_4_TS.html?sts=pi&pim=Y

Q: 2. What is the signal to noise (s/n) ratio? I can't find it in the manual.

A: The company has not made that information available to the public at this point in time.

Q: 3. Will the mixer automatically set the microphone sensitivity? And does it have a limiter?

A: You will have to initially set the mic levels. Then it will open the mic when someone speaks. Yes it has a limiter. A Multi-pin Logic connection provides Mute, Gate and Override remote control options.

Q: 4. Wha is this mexer used for is used for live music?

A: It is being used in a church. For voice and music reinforcement.

Q: 5. Can you use a USB hard drive to multi track record instead of a USB 3.0 Flash drive?

A: Yes, the Soundcraft Ui24R 24-Channel Digital Mixer / Multitrack USB Recorder can be connected to a USB storage drive for multitrack recording of all inputs and your stereo mix. So you can use an external USB hard drive or a USB flash drive. The Ui24R can also be connected directly to a computer for multitrack recording with your favorite recording software.

Q: 6. Turn knob for volume?

A: There is no volume knob as this is a passive speaker with no built in amplifer.

Q: 7. Hi...Just received the mix5...small and nice but...how can I listen to only headphones without also having music coming out the speakers? there is a to headphones button but doesn't do anything...thanks

A: Hi Michael, I have yet to try this with the Mix8 but I will look at it tonight. Have you tried engaging the To Phones button and disengaging the To Mix button? I am guess you have since it seems to be the way it would be done if possible. Though looking at the location of the buttons I am now wondering if they send the RCA inputs to the phones or to Main since they are stacked next to the RCA connectors. I'll do some more looking and experimenting on the 8 and let you know. - Craig

Q: 8. Will this work with four Shure CVB-B/O Boundary Condenser Microphones?

A: The CVB/O operating voltage is 11V - 52V of phantom power. The SCM268 will give you 12V of phantom power so this will work with 4 - CVB/O microphones.

Q: 9. how many speakers total can I connect to this unit - busy restaurant - will they be loud enough without distortion?

A: The number of speakers connected will depend entirely on the speakers' wattage, what their taps are set to, and the way they are wired. The HP-AMP-250BT provides 250w of power, so to prevent clipping the amp the total wattage of speakers connected (+20% for headroom) should be below this number.

Q: 10. it have output delay for delay setuP

A: There is output delay offered on the Left and Right output channels of this device.