The PR 4093 preamplifier is a compact and efficient audio control solution designed for public address and music distribution systems. It features 6 balanced XLR inputs with selectable MIC/LINE sensitivity and phantom power, plus 3 stereo unbalanced inputs via RCA connectors. Input 1 includes a priority function triggered by a VOX circuit, making it ideal for announcements. The unit provides 3 outputs: a stereo XLR with tone control (LOW, MID, HIGH), a mono jack output, and a dedicated MIC output. Additional outputs for recording devices are available on RCA connectors. Front-panel signal LEDs and output level indicators offer real-time status monitoring. With support for both 230V AC and 24V DC emergency power, the PR 4093 ensures continuous performance in critical applications.
Features
6 balanced XLR MIC/LINE inputs with phantom power (18–21 V DC)
3 unbalanced stereo RCA inputs for external audio sources
SIGNAL presence LED for each input channel
VOX-activated priority function on input 1
Front-panel tone controls (LOW, MID, HIGH) for output adjustment
3 output options: stereo XLR, mono jack, and MIC jack
Dedicated RCA output for recording device connection
Output level LED indicator
Operates on 230V AC and 24V DC emergency power supply
Passive convection cooling and front panel configuration
Compact 1U rack-mount metal chassis in black finish
Specifications
| Frequency Response (-3 dB) | 20 Hz ÷ 22,000 Hz |
| Crosstalk | < -68 dB |
| Distortion (THD+N) | < 0.03% @ 1 kHz nominal power |
| Total Number of Inputs | 9 |
| Balanced Inputs | 6 (XLR, MIC/LINE with phantom power) |
| Unbalanced Inputs | 3 (RCA stereo) |
| Mono Inputs | 6 |
| Stereo Inputs | 3 |
| VOX Function | Yes (on input 1) |
| Phantom Power Supply | 18 V DC – 21 V DC |
| Total Number of Outputs | 3 |
| Output Connectors | XLR, ¼” jack, RCA |
| Tone Controls | Yes (LOW, MID, HIGH – front panel) |
| Configuration Controls | Front panel |
| Cooling Method | Convection |
| Operating Voltage | 220-240/115 V~ 50/60Hz |
| Voltage Selection | Internal |
| DC Power Support | Yes (24 V) |
| Power Consumption (Max) | 18 W |
| Safety Compliance | CE compliant |
| Cabinet/Case Material | Metal |
| Color | Black |
| Rack Mounting | 19″, 1U |
| Height | 44 mm / 1.73 inches |
| Width | 483 mm / 19.02 inches |
| Depth | 195 mm / 7.68 inches |
| Weight | 2.8 kg / 6.17 lbs |
| Package Height | 95 mm / 3.74 inches |
| Package Width | 540 mm / 21.26 inches |
| Package Depth | 265 mm / 10.43 inches |
| Package Weight | 3.6 kg / 7.94 lbs |















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