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