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Review Summary
Accidents happen. Protect your favorite Adorama products and purchase a protection plan to stay covered from accidental damage, mechanical or electrical failures, and more.
If we can’t fix it, we’ll replace it at no additional cost.
Protect your product from drops, spills, and more.
Enjoy your gear without fear. We have you covered!
When regular use of your product over time results in mechanical or electrical failure.
We will never charge you a deductible after the purchase of a plan.
Our claims process is simple & easy and our customer service team is happy to help.
Adorama Protect powered by Extend is available for purchase to customers in the United States. Not available for international or U.S. territories purchases. Plans on open box items do not cover pre-existing damage.
Adorama Protect plans are available for ABS clients. If you have any questions or require assistanse, please call 800-223-2500
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Mic: 600 Ohms; Line: 50 kOhms, balanced
NOTE: MIC INPUTS ON ST-UMX3 ARE NOT PROTECTED AGAINST PHANTOM VOLTAGE. USE THE ST-MPA24 or ST-MPA48 MIC PHANTOM ADAPTER
Mic: -18 dBu; Line: +25 dBu
Mic: Adjustable from OFF to 60 dB
Line: Adjustable from OFF to 21 dB
150 Ohms balanced; 75 Ohms unbalanced
Mic: 50 dB below line level
Line: +4 dBu nominal
< 0.006%
Mic ( at 50 dB gain): < 0.04%
Line: < 0.008%
Mic: 50 Hz to 100 kHz (+/- 1 dB)
Line: 10 Hz to 100 kHz (+/- 0.05 dB)
Mic: < -70 dB (50 dB gain)
Line: < -82 dB (unity gain)
18 dB
Mic: > 60 dB
Line: > 50 dB, (50 to 120 Hz)
0 to 55 deg. C (32 to 131 deg. F)
GROUND-REFERENCED, 24 Vdc at 55 mA
813721012265
Are you in search of a durable, high-quality audio mixer that offers both versatility and user-friendly operation Look no further than the ST-UMX3 3x1 Universal Audio Mixer. This compact yet robust device is expertly designed to mix mic-level or line-level signals seamlessly into a single output, making it an ideal choice for live performances, recording studios, and various audio mixing applications.
Each of the three input channels on the ST-UMX3 is equipped with a dedicated MIC/LINE switch, allowing for precise control over the type of signal being processed. This feature ensures compatibility with a wide range of audio sources, from microphones to musical instruments. The separate preamplifier circuit for each input not only provides isolation from other channels but also guarantees the integrity and clarity of your audio.
To tailor the mix to perfection, the ST-UMX3 offers an audio taper single turn gain adjustment for each input preamp. This allows for fine-tuning of levels to achieve the optimal balance between sources. The signals from the three preamps are actively combined and delivered to the output amplifier, which boasts an RDL dual-LED VU meter for accurate monitoring.
The intuitive LED output level meter aids in setting each input level with precision. Adhering to standard VU ballistics, the green LED's intensity increases from a minimum at -11 dBu to full brightness at +4 dBu, providing clear visual feedback for your mixing process. Additionally, the flexibility to switch each input and the output between MIC or LINE levels empowers audio installers and technicians to solve a multitude of mixing challenges with this single, versatile unit.
Crafted by RDL, a brand synonymous with reliability and high-quality audio equipment, the ST-UMX3 Universal Audio Mixer stands as a testament to performance and durability. Whether you're mixing for a live audience or laying down tracks in the studio, this mixer is engineered to deliver consistent, top-notch audio quality every time.