PRE420 Instruction Manual – rev. E Page 6
Features
• Four Transformerless Microphone Inputs
• Four Balanced Direct Outputs (XLR)
• Balanced Left and Right Main Outputs (XLR)
• Balanced Left and Right Control Room Outputs (XLR)
• HPA2™ “0-Ohm” 1/4” TRS Headphone Output
• Precision-Matched Monolithic Low-Noise Transistor Quads on Each Microphone Input
• High-Current High-Speed Low-Capacitance Phantom Protection Circuits
• Fully Protected Against Phantom Hot-Plug and Cable-Shorting Scenarios
• Balanced Transformerless Inputs and Outputs
• +48v Phantom Power Switch on Every Microphone Input
• 40 Hz High-Pass Filter Switch on Every Microphone Input (12 dB/octave)
• 20 dB Pad Switch on Every Microphone Input
• Matched 41-Detent First-Stage Gain Controls on Every Microphone Input
• 60 dB Maximum First-Stage Gain, Adjustable to 70 dB
• 22 to 60 dB Gain (pad off), 2 to 40 dB (pad on)
• +27 dBu Maximum Input Level (with pad), +7 dBu (without pad)
• +29.5 dBu Maximum Output Level on all Balanced Outputs
• + 23.5 dBu Maximum Headphone Output Level
• MirrorPan™ Low-Distortion Constant-Power Pan Controls (1 per input channel)
• Solo Switches (1 per input channel)
• Mono/Stereo Solo Switch for Flexible Monitoring
• 41-Detent Control Room/Headphone Level Control
• 41-Detent Main Output Level Control
• Control Room “Mute on Headphone Insertion” Mode Switch (rear panel)
• Intensity Modulated Signal Presence LEDs (Green - 4 on direct outputs plus 2 on main outputs)
• +24 dBu Warning LED (Red – 4 on direct outputs plus 2 on main outputs)
• Solo Warning LED (Yellow)
• +48V Phantom Warning Indicators (Yellow - 1 per input channel)
• Power LED (Blue)
• Ultra-Quiet Linear Power Supply with Rear-Panel Input Voltage Selector
• Complies with FCC and CE Regulations
• RoHS Compliant
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