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DBX 676 Tube Mic PreampN°Article. DBX676

Modèle : DBX676

1 449, 99 $

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  • Class-A Vacuum Tube Preamp with High Voltage Gain
  • High-Visibility Vintage VU Meter
  • Compressor designed from the dbx162SL
  • 3-Band Semi-Parametric EQ
  • 1/4” and XLR Inputs and Outputs
  • Front Panel Instrument Input
  • Side Chain Insert


Mic Preamp ConnectorFemale XLR Pin 2 Hot; Electronically balanced/unbalanced 
Mic Preamp Input Impedance1.9 kΩ 
CMRR>85 dB from 20 Hz to 3 kHz, >70 dB from 3 kHz to 20 kHz
Instrument Input ConnectorTip-Sleeve ¼” Jack
Input Type(instrument) Unbalanced 
Instrument Input Impedance500 k Ω
Max Input(instrument) +21dBu unbalanced 
Preamp Insert ConnectorTip-Ring-Sleeve ¼”, RF filtered
Preamp Insert TypeUnbalanced, Tip = send, Ring = return
Line Outputs (Preamp & Compressor/Limiter) ConnectorMale XLR and Tip-Ring-Sleeve ¼” (Pin 2 and Tip hot)
Line Outputs (Preamp & Compressor/Limiter) TypeServo-balanced/unbalanced
Line Outputs (Preamp & Compressor/Limiter) ImpedanceBalanced 30 Ω, unbalanced 15 Ω
Line Outputs (Preamp & Compressor/Limiter) Maximum Output Level> +21 dBm (into a 600 ohm load)
Compressor Sidechain Insert ConnectorTip-Ring-Sleeve ¼”, RF filtered
Compressor Sidechain Insert TypeUnbalanced, Ring = output, Tip = input
Compressor Sidechain Insert Impedance1 kΩ (output), 50 kΩ (input)
Vacuum Tube Type12AU7A / 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 FloorMic Insert to Comp Output: <-93 dBu, unity gain, EQ flat and no gain reduction
Preamp Function Switches/Controls: Instrument InputSelects between microphone XLR input and front panel ¼” instrument input
Preamp Function Switches/Controls: +48VSends +48 VDC through 6.81 kΩ resistors to pins 2 and 3 of the microphone input
Preamp Function Switches/Controls: 20dB PadAttenuates the microphone input by 20 dB
Preamp Function Switches/Controls: Polarity InvertReverses pins 2 and 3 of the microphone input XLR
Preamp Function Switches/Controls: 80 Hz Low CutEnables 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 IndicatorIlluminates RED when the Preamp is within 3 dB of clipping
EQ Low Frequency100 Hz, Low-pass shelving filter
EQ High Frequency10 kHz, High-pass shelving filter
EQ Mid FrequencySweepable from 100 Hz to 8 kHz
EQ Function Switches/Controls: NarrowSelects 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 CharacteristicSelectable OverEasy™ or Hard Knee
Compressor RatioVariable 1:1 to ∞:1; 60 dB maximum Compression
Compressor Attack/Release ModesSelectable Manual or Auto
Compressor Manual Attack TimeScalable program-dependent; Typically 400 dB/msec to 1 dB/msec
Compressor Manual Release TimeScalable program-dependent; Typically 4000 dB/sec to 10 dB/sec
Compressor Auto Attack TimeProgram-dependent, typically 15 ms for 10 dB, 5 ms for 20 dB, 3 ms for 30 dB
Compressor Auto Release TimeProgram-dependent, typically 120 dB/sec
Compressor Output Level Control Range-20 dB to +20 dB
Compressor Peak IndicatorIlluminates RED when the Compressor/Limiter is within 3 dB of clipping
Limiter Typedbx PeakPlus™
Limiter Threshold Range-4 dBu to + 22 dBu (off)
Limiter Ratio∞:1
Limiter Attack and ReleaseProgram-dependent
Power SupplyUniversal switch-mode
Operating Voltage100 – 240 VAC, 50/60 Hz
Power Requirements20 Watts
FuseT2.5AL 250V
Turn-On TimeApproximately 2 seconds
Dimensions3.5”H X 19”W X 8”D (88.9mmH X 482.6mmW X 203.2mmD)
Weight8.1 lbs (3.7 kg)
Shipping Weight11.0 lbs (5.0 kg)

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