UR4 Heat Dissipation

FAQ #3800 Updated October 16, 2017

Question:

What is the heat dissipation of a UR4 wireless microphone receiver? We need to provide adequate cooling to accommodate several receivers in a closed cabinet.

Answer:

The UR4 receivers utilize AC power for operation. A high percentage of the power used is converted to heat. So the heat dissipation of a UR4 receiver can essentially be calculated from the AC power consumed.

There are several variables that can affect the exact power required by a receiver:
1 - Ambient temperature - power drawn will increase slightly with temperature.
2 - Active antenna system components, such as line RF amplifiers and amplified antennas can optionally be powered from the antenna terminals on the receiver.
3 - Audio level - current required by LED level indicators, the headphone amplifier, and the line driver can cause small variations in the required power.

Here is typical/maximum required AC power and estimated heat dissipation:

UR4S Single Receiver Chassis
Typical power required: 18 Watts (~62 BTU/hr)
Maximum power required: 21 Watts (~72 BTU/hr)

UR4D Dual Receiver Chassis
Typical power required: 24 Watts (~82 BTU/hr)
Maximum power required: 27 Watts (~93 BTU/hr)

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