Why Choose Crutchfield?
Great gear and expert advice
Our experts help you pick the ideal gear for your needs.Meet our advisors
Free tech support for the life of your gear.Read about our one-on-one expert help
You may return items that are complete and like new for any reason within 60 days.See the details of our return policy
Earn one point for every dollar you spend and use those points to save on future purchases.Get full details on Crutchfield Rewards
Deep discounts on car installation gear
We offer vehicle-specific installation instructions, dash kits, wiring harnesses, and speaker accessories at deeply discounted prices with car stereo and speaker purchases. Available for most vehicles.Learn more
Trusted since 1974
Our customers have trusted us with their business, and they’ve helped us win awards for our service.Check out our most recent awards
The manufacturer’s warranty always applies.See more details
Sound Ordnance USO-MIX3
PA system mixer
Item #: 777USOMIX3
This item is no longer available.
Sound Ordnance USO-MIX3
Our take on the Sound Ordnance USO-MIX3 by Crutchfield's Ralph Graves
Need a simple audio mixer for your PA gear? Check out this compact, rack-mountable mixer from Sound Ordnance. Whether you're a musician, DJ, or just doing sound engineering for a club, wedding, or civic function, this mixer can get the job done especially with the Sound Ordnance PA system.
Multiple inputs/outputs for versatility
Connect just about any audio source. The mixer has three stereo line-level RCA inputs for your components or portable devices, as well as a dedicated phono input. There's also a front-panel 1/4" jack for plugging in a microphone.
Outputs include stereo line-level RCA, as well as a pair of balanced XLR outputs for making lower-noise connections.
Simple controls for mixing sound
The mixer's input level controls let you adjust the volume of all inputs individually. And once you have your mix, use the main volume control to raise or lower the overall output from the mixer. You can also adjust the bass, midrange, and treble of your signal, for optimal frequency balance. And there's a peak level monitor so you know when the sound's getting too hot (volume-wise, that is).
What's in the Box:
- Audio mixer (1 mic/3 line)
- 6.5' AC power cord
- Two 6.5' XLR audio cables (with a male XLR connector on one end and a female XLR connector on other end)
- Owner's Manual
- stereo mixer for Sound Ordnance PA system
- displays and controls:
- peak output level display
- main volume control
- input level controls
- bass, midrange, and treble EQ controls
- 3 RCA stereo line-level inputs
- phono input with ground
- 1/4" front-panel jack for microphone
- stereo RCA and balanced XLR outputs
- selectable input voltage
- detachable power cord
- 19-1/16"W x 2"H x 8-13/16"D
- weight: 6.7 lbs.
- warranty: 1 year
- Our 60-day money-back guarantee
Overview: The Sound Ordnance USO Mixer (USO-MIX3) is intended for use in home and semi-professional audio systems, mixing and controlling low-level audio signal from a variety of different sources. Its a great addition to the Sound Ordnance PA System (sold separately).
Peak/Level Output Display: The front-panel Peak/Level Output Display indicates the device's output level. If the white display LED lights up, the output level is too high.
Main Level Control: The front-panel main level control sets the overall output level of the mixer.
Input Level Controls: The front-panel input level controls (Phone/Line1/Line2/Line3/Mic) set the level of the signal source connected to the corresponding input.
Bass/Mid/Treble Controls: The front-panel tone controls let you adjust the tonal output of the mixed audio signal with separate controls for the bass, midrange, and treble.
RCA Inputs: The Sound Ordnance USO Mixer has 3 stereo line-level inputs for use with devices, such as your CD player, MP3 player, or Tape deck.
Note: This audio mixer is only intended for use with line-level audio signal inputs.
Phono Input: The mixer features a rear-panel Phono input which lets you connect your turntable. Do not connect your turntable to the other RCA jack on this mixer. A Phono ground connection is available if your turntable has a ground cable.
Mic Input: A dynamic microphone with a 1/4" jack can be connected to the mixer's front-panel Mic input. There is a front-panel switch which turns the Mic input On or Off.
Note: When the Mic input is turned on, the mixer's Line 3 RCA input is disabled.
RCA/XLR Outputs: The Sound Ordnance USO Mixer is equipped with an unbalanced stereo RCA output and a balanced stereo XLR stereo output. Either the RCA or XLR audio output will be connected to your amplifier. The RCA/XLR outputs are located on the rear-panel of the mixer.
Note: Do not connect both RCA/XLR outputs to your amplifier.
Power Requirements: The audio mixer can operate on either 110-120 volt or 220-240 volt alternating current. The Input voltage is selectable. A 6.5' detachable AC power cord is supplied.
Indoor Use Only: The mixer is designed for indoor use and should not be exposed to damp or wet environments.
- Line: 7.4 kOhm
- Phono: .50 kOhm
- Mic: > 50 kOhm
- Line: 1.93 V
- Phono: 24.5 mV
- Mic: 17.5 mV
- RCA: 8.6 V with 10 kOhm
- XLR: 2.5 V with 600 Ohm
Frequency Response: 10-25,000 Hz
S/N Ratio: 90 dB
THD: 0.001 %
Channel Separation: 81 dB
Operation Voltage: 110-120 V, 50-60 Hz or 220-240 V, 50-60 Hz
Power Consumption: 5 watts
Fuse: T 100 mA/250 V (5 x 20mm); 110-120 V system
Our Product Research Team
At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.