Crest Audio UMA 4300 4 Channel Mixer Amplifier

UPC: 3616040UPC: 3616040

The Crest Audio UMA 4300 4 Channel Mixer Amplifier combines a four-input mixer with a highly efficient Class D 300 Watts mono amplifier. Each of the four inputs can handle a variety of input signals, including microphone, balanced line level and mono or stereo unbalanced line sources.

Features of the Crest Audio UMA 4300 4 Channel Mixer Amplifier:

• 300 Watts Class D power amplifier
• SPS speaker protection system
• High-pass filter to protect speaker transformers from low frequency overload
• 2U rack-mount chassis
• Four input level controls with signal/clip/mute LEDs
• Power, signal and SPS indication LEDs
• Master volume
• Four electronically balanced Mic/Line inputs
• Inputs 1 and 2 are electronically balanced with Euro connectors and preamp gain control
• Inputs 1 and 2 have phantom power with switch
• Inputs 3 and 4 have switch to select balanced Euro connector or dual RCA connectors
• Inputs 3 and 4 have rear panel preamp gain controls
• Input 1 Level sensing muting of inputs 2-4 with threshold/defeat control
• Balanced output with level control
• Switchable Mix output or input 4 Direct output
• Output is not affected by mute or channel level if channel 4 is selected
• Preamp output, power amp input for inserting processing with Bypass switch
• 4 Ω, 25V, 70V and 100V outputs
• Bass and Treble controls
• Power switch
• Line voltage switch for 120V or 240 VAC operation


Channels (Input)

Channels (Output)

Power per Channel @ 4 Ω
300 W

Power per Channel @ 70V
300 W

Power per Channel @ 100V
300 W

Class D

Minimum Load Impedance
4 Ω

Frequency Response
-3 dB, 65 Hz – 20 kHz; +0

Phantom Power
Yes (48V)

Mute Groups
Priority / Mute All

Input Connectors
4 x 3-pin Euro Connector & 2 x Dual RCA

Output Connectors
1 x 5-pin Screw Terminal


Rack Mount (19″)
Yes (2U)

Net Weight
15.4 lbs (7.00 kg)

Product Height
3.45″ (88 mm)

Product Width
19.00″ (483 mm)

Product Depth
13.25″ (337 mm)

AC Power Input
Dual Voltage – 120 or 220-240VAC 50/60 Hz


Crest Audio

Legendary for its powerful and reliable touring-class sound reinforcement tools, Crest Audio is a global leader in designing and manufacturing power amplifiers for live, commercial and networked sound systems, and a complete line of mixing consoles for live and installed audio markets.

Crest Audio burst onto the audio scene in the late 1970s with the singular goal of advancing live sound through bulletproof engineering. The low noise, high headroom and live sound features Crest Audio was able to pack into its mixers set a new industry standard, and they immediately became indispensable on the touring circuit. they soon found ways to incorporate more punch into everything from preamps to loudspeakers and everything on the rack in between.

Crest is a company after Peavey’s own heart, so it made perfect sense when Peavey acquired Crest in 1999. Still sold under the strong Crest Audio name, the product line continues to deliver more features and more reliability than ever


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