DBX 386 Dual Vacuum Tube Preamp with Digital Out

Priced: $529.95
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DBX 386 Dual Vacuum Tube Preamp with Digital Out -

The dbx 386 Dual Vacuum Tube Preamp with Digital Out is a dual channel tube microphone preamp that comes with the additional capabilities of digital output. With the included digital outputs, the unit is the perfect companion for recording and tracking vocals, or any applications needing microphones, both in the analog and digital domain.
It combines the warmth of a vacuum tube, with the proprietary dbx Type IV A/D conversion system. In addition to the above features, the single rack space unit contains such standard offerings as +48V phantom power, a phase invert switch and low cut filtering. The digital outputs capabilities are supported in both AES/EBU and S/PDIF formats, as well as word clock I/O as standard features.
To provide convenience in the studio, the high impedance 1/4" instrument input, as well as the mic/line switch and 20dB pad of the 386 are located on the front panel. The LED meters give clear and concise information about the state of signal processing, while the rear panel houses the mic and line inputs and outputs, word clock sync input and output and digital outputs. Finally, the unit sports selectable sampling rates of 44.1, 48, 88.2 and 96 kHz, selectable dithering and noise shaping and separate analog and digital output controls.


  • 20dB pad


  • 24, 20 and 16-bit word lengths


  • 48 volt phantom power
  • Selectable dither and noise shaping
  • Phase reverse
  • Word clock sync input and output
  • Segment LED analog/digital
  • Selectable 96kHz, 88.2kHz, 48kHz, or 44.1kHz sampling rate
  • Type IV conversion system
  • 75Hz low cut filter
  • Selectable mic/line switch
  • Two channel tube microphone preamplifier
  • 60dB of gain and +/- 15dB of output gain
  • Separate analog and digital output control
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Analog Outputs: Connector:Male XLR Pin 2 Hot and TRS 1/4"
Analog Outputs: Impedance:Balanced 120 ohm, unbalanced 60 ohm
Analog Outputs: Maximum Output Level:>+21 dBu, >+20 dBm (into a 600 ohm load)
Analog Outputs: Type:Servo-balanced/unbalanced
Analog to Digital: Dither Type:TPDF, SNR2, or none
Analog to Digital: Dynamic Range:107dB typical, A-weighted, 22kHz bandwidth
Analog to Digital: Noise Shape:Shape 1, Shape 2, or none
Analog to Digital: Output Format:S/PDIF or AES/EBU
Analog to Digital: Sample Rate:96, 88.2, 48, or 44.1kHz selectable
Analog to Digital: Type:dbx Type IV A/D Conversion System
Analog to Digital: Wordlength:24, 20, or 16 bit selectable
Digital Outputs: Connector:XLR for AES/EBU RCA for S/PDIF
Digital Outputs: Impedance:110 ohm for AES/EBU 75 ohm for S/PDIF
Dimensions (H x D x W):1.75" x 7.75" x 19" (4.5cm x 19.7cm x 48.5cm)
Drive Control Range:+30dB to +60dB for Mic Input -15dB to +15dB for Line and Instrument Inputs
Instrument Input: Connector:TS 1/4" Jack
Instrument Input: Impedance:470k ohm 100 ohm, send -20 ohm return
Instrument Input: Insert Connector:TRS 1/4"
Instrument Input: Maximum Output Level:>+21 dBu unbalanced
Instrument Input: Type:Unbalanced
Interchannel Crosstalk:Typically -80dB, 20Hz to 20kHz
LEVEL Control Range (Analog and Digital):-15dB to +15dB
Line:Selects between microphone and line inputs
Line Input: CMRR:>40dB, Typically 55dB
Line Input: Connector:TRS 1/4" Jack
Line Input: Gain (Drive Control):-15dB to +15dB
Line Input: Impedance:20k ohm unbalanced, 40k ohm balanced
Line Input: Max Input Level:+21dBu balanced or unbalanced
Line Input: Type:Electronically balanced/unbalanced
Low cut:75Hz, 12dB/octave high pass filter
Mic Input: CMRR:>40dB, Typically 55dB
Mic Input: Connector:Female XLR Pin 2 Hot
Mic Input: Equivalent Input Noise:Typically 120 dBu with a 150 ohm, source load 20 Hz to 20kHz Bu
Mic Input: Impedance:330 ohm
Mic Input: Max Input Level:-9 dBu or +11 dBu with 20 dB pad engaged
Mic Input: Type:Electronically balanced/unbalanced
Operating Voltage:DO: 120VAC 60Hz, 100VAC 50/60Hz EU: 230VAC 50/60 Hz
PAD:20dB pad
Phantom Power:+48V
Phase:Reverses pins 2 and 3 of the microphone input XLR
Power consumption:35W
System Performance: Frequency Response:<10Hz to 75kHz
THD + Noise:0.35% typical at +4dBu out, 1kHz, 40 dB gain
Weight:6.89 lbs (3.17kg)
Word Sync Input/Out: Input:96, 88.2, 48, or 44.1kHz word clock
Word Sync Input/Out: Output:96, 88.2, 48, or 44.1kHz word clock
Word Sync Input/Output: Connectors:BNC
Word Sync Input/Output: Input Impedance:75 ohm terminated by internal jumper

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