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DBX 386


Dual Channel Tube Mic Preamp

The Silver Series 386 dual channel tube mic preamp puts the best of both worlds into one affordable package.

SKU: 386 Categories: , ,
Brands: DBX


The Silver Series 386 dual channel tube mic preamp puts the best of both worlds into one affordable package by combining the warmth of the irreplaceable vacuum tube with the proprietary dbx® Type IV™ conversion system. The 386 boasts many of the same features as other products in the Silver Series, such as +48V phantom power, a phase invert switch, and low cut filtering; but also includes digital outputs in both AES/EBU, and S/PDIF formats.

The high impedance, 1/4″ instrument input located on the front panel, as well as the mic/line switch, and 20 dB pad show our dedication to providing convenience in the studio. The 12 segment LED meters provide a visual indication of analog or digital levels at a glance. The rear panel includes both mic and line inputs and outputs, word clock sync input and output, and digital outputs. Add selectable sampling rates of 44.1 kHz, 48 kHz, 88.2 kHz, or 96 kHz; selectable dithering and noise shaping; and separate analog and digital output controls to this already impressive list of features, and we think you’ll agree that the 386 lives up to the innovative dbx® standards.

Additional information

Weight 3.17 kg

Two channel tube microphone preamplifier
Selectable 96kHz, 88.2kHz, 48kHz, or 44.1kHz sampling rate
24, 20, and 16-bit wordlengths
Selectable dither and noise shaping
AES/EBU and S/PDIF digital outputs
Word clock sync input and output
Separate analog and digital output control
Type IV™ conversion system
60dB of gain and +/- 15dB of output gain
Selectable mic/line switch
48 volt phantom power
20dB pad
75Hz low cut filter
Phase reverse
Segment LED analog/digital


Mic Preamp Connector
Female XLR Pin 2 Hot; Electronically balanced/unbalanced

Mic Preamp Input Impedance

Mic Preamp max input level
-9 dBu or +11 dBu with 20 dB pad engaged

>40dB, Typically 55dB

Mic Preamp Equivalent Input Noise (EIN)
Typically -120 dBu with a 150Ω source load, 20Hz to 20kHz BW

Input Connectors
(instrument/line) 1/4" Jack

Input Type
(line) Electronically balanced/unbalanced; (instrument) Unbalanced

Max Input
(instrument/line) +21dBu balanced or unbalanced

Gain Adjustment Range
(drive control) Line/Instrument: -15dB to +15dB; Mic: +30dB to +60dB

Output Connectors
Male XLR Pin 2 Hot and TRS 1/4"

Output Type

Output Impedance
Balanced 120Ω, unbalanced 60Ω

Max Output
>+21 dBu, >+20 dBm (into a 600Ω load)

Digital Output Connector

Digital Output Impedance
110Ω for AES/EBU, 75Ω for S/PDIF

Word Sync I/O Connectors

Word Sync Input Impedance
75Ω terminated by internal jumper

Word Sync Input
96, 88.2, 48, or 44.1kHz word clock

Word Sync Output
96, 88.2, 48, or 44.1kHz word clock

Output Level
-15dB to +15dB

Line Switch
Selects between microphone and line inputs

Mic Preamp Phantom Power

Pad Switch
20dB pad

Phase Invert Switch
Reverses pins 2 and 3 of the microphone input XLR

Low cut Switch
75Hz, 12dB/octave high pass filter

Frequency Response
(analog) <10Hz to 75kHz

0.35% typical at +4dBu out, 1kHz, 40 dB gain

Interchannel Crosstalk
Typically –80dB, 20Hz to 20kHz

A/D Converter
dbx® Type IV® A/D Conversion System

Sample Rate
96, 88.2, 48, or 44.1kHz selectable

24, 20, or 16 bit selectable

Dither Type
TPDF, SNR2, or none

Noise Shape
Shape 1, Shape 2, or none

Digital Output

Digital Output Dynamic Range
107dB typical, A-weighted, 22kHz bandwidth

Operating Voltage
DO: 120VAC 60Hz, 100VAC 50/60Hz; EU: 230VAC 50/60Hz

Power Consumption

1.75'' x 7.75'' x 19'' (4.5cm x 19.7cm x 48.5cm)

Unit Weight
6.89 lbs (3.17kg)

0dBu = -16dFS, 0dBu-0.775Vms



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STUDIO Microphones DBX 386