Loyola Enterprises

A veteran and minority owned SDB Certified Business.


DBX Silver Series 386

757.498.6118 Ext - 109DBX Silver Series 386 - Call for pricing - Tube Mic Preamp


PDFDBX Silver Series 386 Cut Sheet (pdf)

PDFDBX Silver Series 386 Manual (pdf)

PDFDBX Silver Series 386 App. Guide (pdf)

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, ¼" instrument input located on the front panel, as well as the mic/line switch, and 20 dB pad show their 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 you’ll agree that the 386 lives up to the innovative dbx® standards.


  • Two channel tube microphone preamplifier
  • Selectable 96 kHz, 88.2 kHz, 48 kHz, or 44.1 kHz 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
  • Front Panel Instrument Input
  • Type IV™ conversion system
  • 60 dB of gain and ± 15 dB of output gain
  • Selectable mic/line switch
  • 48 volt phantom power
  • 20 dB pad
  • 75 Hz low cut filter
  • Phase reverse
  • 12 segment LED selectable analog/digital level meter
  • Peak Indicator LED

Microphone Input
Connector Female XLR Pin 2 Hot
Type Electronically balanced/unbalanced
Impedance 330 Ω
Max. Input Level -9 dBu or +11 dBu with 20 dB pad engaged
CMRR >40 dB, typ 55 dB
Mic EIN typ. 120 dBu with a 150 Ω source load, 20 Hz to 20 kHz BW
Line Input (Rear Panel)
Connector TRS ¼" Jack
Type Electronically balanced/unbalanced
Impedance (bal./unbal.) 40 kΩ / 20 kΩ
Max. Input Level +21 dBu
CMRR >40 dB, typ 55 dB
Gain (Drive Control) -15 dB to +15 dB
Instrument Input (Front Panel)
Connector TS ¼" Jack
Type Unbalanced
Impedance 470 Ω
Max. Input Level +21 dBu
Analog Outputs
Connector Male XLR Pin 2 Hot and TRS ¼"
Type Servo-balanced/unbalanced
Impedance (bal./unbal.) 120 Ω / 60 Ω
Max. Output Level >+21 dBu, >+20 dBm (into a 600 Ω load)
Connector TRS ¼"
Type Unbalanced
Impedance (SEND/RETURN) 100 Ω / -20 Ω
Digital Outputs
Connectors XLR for AES/EBU; RCA for S/PDIF
Impedance (XLR/RCA) 110 Ω / 75 Ω
Word Sync Input/Output
Connectors BNC
Input Impedance 75 Ω terminated by internal jumper
Input 96, 88.2, 48 or 44.1 kHz word clock
Output 96, 88.2, 48 or 44.1 kHz word clock
System Performance
DRIVE Control Range +30 dB to +60 dB for Mic Input;
-15 dB to +15 dB for Line and Instrument Inputs
LEVEL Control Range (analog and digital) -15 dB to +15 dB
LINE selects between microphone and line inputs
Phantom Power +48 V
PAD 20 dB pad
PHASE Reverse pins 2 and 3 of the microphone input XLR
LOW CUT 75 Hz, 12 dB/octave high pass filter
Analog Frequency Response <10 Hz to 75 kHz
THD+Noise @ 1 kHz 0.35% typical at +4 dBu out, 40 dB gain
Interchannel Crosstalk Typically -80 dB, 20 Hz to 20 kHz
Analog to Digital Conversion
Type dbx Type IV™ A/D Conversion System
Sample Rate 96, 88.2, 48, or 44.1 kHz selectable
Wordlength 24, 20, or 16 bit selectable
Dither Type TPDF, SNR², or none
Noise Shape Shape 1, Shape 2, or none
Output Format S/PDIF or AES/EBU
Convertor Dynamic Range 107 dB typical, A-weighted, 22 kHz bandwidth
Physical and Power
Operating Voltage DO: 120 VAC 60 Hz, 100 VAC 50/60 Hz
EU: 230 VAC 50/60 Hz
Power Requirements 35 Watts
Weight 3.17 kg (6.89 lbs)
Dimensions 4.5 x 19.7 x 48.5 cm (1.75" x 7.75" x 19")
For pricing options and packages, contact us at
757.498.6118 Ext - 109, Or