
Shure 
Inputs and Outputs
UR1 Transmitter Audio Input
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 | Input Configuration: | Unbalanced, active | 
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 | Actual Impedance: | >1 M: | 
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 | Maximum Input Level: | +10 dBu (sensitivity 0 dB) | 
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 | 1 kHz, 1% THD | +20 dBu (sensitivity  | 
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 | TA4M Connector | Pin 1: Ground | 
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 | Pin Assignments: | Pin 2: +5 Vdc bias | 
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 | Pin 3: Audio | 
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 | Pin 4: Tied through active load (on main | 
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 | board) to Ground. | 
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 | (On instrument adapter cable, Pin 4 | 
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 | floats) | 
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| UR1 Transmitter RF Output | 
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 | Connector: | SMA | 
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 | Actual Impedance: | 50 : | 
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 | Pin Assignments: | Shell = Ground | 
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 | Center = Signal | 
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| UR2 Transmitter Audio Input | 
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 | Input Configuration: | Unbalanced, active | 
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 | Actual Impedance: | >1 M: | 
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 | Maximum Input Level: | +4.8 dBu | 
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 | 1 kHz, 1% THD | 
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| UR2 Transmitter RF Output | 
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 | Connector: | SMA | 
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 | Actual Impedance: | 50 : | 
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 | Pin Assignments: | Shell = Ground | 
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 | Center = Signal | 
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XLR
Receiver Input
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 | Antenna | Power | 
| Connector Type: | BNC | IEC | 
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| Actual Impedance: | 50 : | - | 
| Nominal Input Level: | ||
| Maximum Input | 240 VAC, + 10%, 50/60 Hz | |
| Level: | 
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| Pin Assignments: | Shell = Ground | IEC Standard | 
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 | Center = Signal | 
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| Bias Voltage* | 12.2 Vdc @ 150 mA | N/A | 
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 | maximum | 
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*For remote antenna amplifiers
Receiver Audio Output
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 | Monitor (1/4” | 1/4” Phone | XLR | 
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 | Headphone) | 
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| Output Configuration: | Unbalanced | Impedance | Electrically | 
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 | mono, 1/4 inch | Balanced | Balanced | 
| Actual Impedance: | 50 : | 200 : | 200 :(active | 
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 | balanced) | 
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 | (150 : mic) | 
| Maximum Output Level | 1 Watt @ 63 : | +18 dBu | +24 dBu | 
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 | with 100 Hz | 
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 | modulating tone | 
| Pin Assignments: | Tip = Hot | Tip = Hot | 1 = Ground | 
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 | Ring = Hot | Ring = no signal | 2 = Audio + | 
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 | Sleeve = Gnd | Sleeve = Gnd | 3 = Audio – | 
| Phantom Power | No | Yes | Yes | 
| Protection? | 
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| Computer/Network Interface | 
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| Ethernet | USB* | 
| RJ45 | USB Series B Receptacle | 
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1/4” Monitor/headphone
1/4” Phone
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