| Mic Preamp Connector | Female XLR Pin 2 Hot; Electronically balanced/unbalanced |
| Mic Preamp Input Impedance | 1.9 kΩ |
| CMRR | >85 dB from 20 Hz to 3 kHz, >70 dB from 3 kHz to 20 kHz |
| Instrument Input Connector | Tip-Sleeve ¼" Jack |
| Input Type | (instrument) Unbalanced |
| Instrument Input Impedance | 500 k Ω |
| Max Input | (instrument) +21dBu unbalanced |
| Preamp Insert Connector | Tip-Ring-Sleeve ¼", RF filtered |
| Preamp Insert Type | Unbalanced, Tip = send, Ring = return |
| Line Outputs (Preamp & Compressor/Limiter) Connector | Male XLR and Tip-Ring-Sleeve ¼" (Pin 2 and Tip hot) |
| Line Outputs (Preamp & Compressor/Limiter) Type | Servo-balanced/unbalanced |
| Line Outputs (Preamp & Compressor/Limiter) Impedance | Balanced 30 Ω, unbalanced 15 Ω |
| Line Outputs (Preamp & Compressor/Limiter) Maximum Output Level | > +21 dBm (into a 600 ohm load) |
| Compressor Sidechain Insert Connector | Tip-Ring-Sleeve ¼", RF filtered |
| Compressor Sidechain Insert Type | Unbalanced, Ring = output, Tip = input |
| Compressor Sidechain Insert Impedance | 1 kΩ (output), 50 kΩ (input) |
| Vacuum Tube Type | 12AU7A / ECC82 |
| Vacuum Tube Grid Power Supply | +250V DC |
| Vacuum Tube Heater Power Supply | +12V DC |
| Frequency Response (Mic Input) | 20 Hz to 50 kHz, +0/-1dB, 40 dB gain |
| Frequency Response (Instrument Input) | 30 Hz to 70 kHz, +0/-1dB, unity gain |
| THD + Noise (Mic In to LIne Out) | 0.25% typical at 0 dBu out, 1 kHz, 40 dB gain |
| THD + Noise (Instrument In to Line Out) | 0.2% typical at 0 dBu out, 1kHz, unity gain |
| Equivalent Noise Level | Typically > -123 dBu with a 150 Ω source load, 22 Hz to 22 kHz |
| Noise Floor | Mic Insert to Comp Output: <-93 dBu, unity gain, EQ flat and no gain reduction |
| Preamp Function Switches/Controls: Instrument Input | Selects between microphone XLR input and front panel ¼" instrument input |
| Preamp Function Switches/Controls: +48V | Sends +48 VDC through 6.81 kΩ resistors to pins 2 and 3 of the microphone input |
| Preamp Function Switches/Controls: 20dB Pad | Attenuates the microphone input by 20 dB |
| Preamp Function Switches/Controls: Polarity Invert | Reverses pins 2 and 3 of the microphone input XLR |
| Preamp Function Switches/Controls: 80 Hz Low Cut | Enables an 80 Hz, 12 dB/octave high pass filter in the microphone and instrument signal path |
| Preamp Function Switches/Controls: Gain Control Range | -∞ to +55 dB for Microphone Input; -∞ to +40 dB for Instrument Input |
| Preamp Function Switches/Controls: Post Tube Attenuation | -∞ to 0 dB |
| Preamp Function Switches/Controls: Peak Indicator | Illuminates RED when the Preamp is within 3 dB of clipping |
| EQ Low Frequency | 100 Hz, Low-pass shelving filter |
| EQ High Frequency | 10 kHz, High-pass shelving filter |
| EQ Mid Frequency | Sweepable from 100 Hz to 8 kHz |
| EQ Function Switches/Controls: Narrow | Selects the "Q" of the MID Frequency EQ. "OUT" position Q = 0.9; "IN" position Q = 2.9 |
| EQ Gain | (All Bands) Sweepable from -15 to +15 dB |
| Compressor Threshold Range | -40 dBu to +20 dBu |
| Compressor Threshold Characteristic | Selectable OverEasy™ or Hard Knee |
| Compressor Ratio | Variable 1:1 to ∞:1; 60 dB maximum Compression |
| Compressor Attack/Release Modes | Selectable Manual or Auto |
| Compressor Manual Attack Time | Scalable program-dependent; Typically 400 dB/msec to 1 dB/msec |
| Compressor Manual Release Time | Scalable program-dependent; Typically 4000 dB/sec to 10 dB/sec |
| Compressor Auto Attack Time | Program-dependent, typically 15 ms for 10 dB, 5 ms for 20 dB, 3 ms for 30 dB |
| Compressor Auto Release Time | Program-dependent, typically 120 dB/sec |
| Compressor Output Level Control Range | -20 dB to +20 dB |
| Compressor Peak Indicator | Illuminates RED when the Compressor/Limiter is within 3 dB of clipping |
| Limiter Type | dbx PeakPlus™ |
| Limiter Threshold Range | -4 dBu to + 22 dBu (off) |
| Limiter Ratio | ∞:1 |
| Limiter Attack and Release | Program-dependent |
| Power Supply | Universal switch-mode |
| Operating Voltage | 100 - 240 VAC, 50/60 Hz |
| Power Requirements | 20 Watts |
| Fuse | T2.5AL 250V |
| Turn-On Time | Approximately 2 seconds |
| Dimensions | 3.5"H X 19"W X 8"D (88.9mmH X 482.6mmW X 203.2mmD) |
| Weight | 8.1 lbs (3.7 kg) |
| Shipping Weight | 11.0 lbs (5.0 kg) |
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