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dbx 386 Dual Vacuum Tube Preamplifier with Digital Out
The dbx 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 dbx 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 youll agree that the dbx 386 lives up to the innovative dbx® standards.
dbx 386 Dual Vacuum Tube Preamplifier with Digital Out Features:
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
dbx 386 Dual Vacuum Tube Preamplifier with Digital Out Specifications:
MICROPHONE INPUT
Connector: Female XLR Pin 2 Hot
Type: Electronically balanced/unbalanced
Impedance: 330Ω
Max Input Level: -9 dBu or +11 dBu with 20 dB pad engaged
CMRR: >40dB, Typically 55dB
Equivalent Input
Noise: Typically 120 dBu with a 150Ω, source load 20 Hz to 20kHz Bu
LINE INPUT (REAR PANEL)
Connectors: TRS 1/4" Jack
Type: Electronically balanced/unbalanced
Impedance: 20kΩ unbalanced, 40kΩ balanced
Maximum Input Level: +21dBu balanced or unbalanced
CMRR: >40dB, Typically 55dB
Gain (Drive Control): -15dB to +15dB
INSTRUMENT INPUT (FRONT PANEL)
Connector: TS 1/4" Jack
Type: Unbalanced
Impedance: 470kΩ
Maximum Output
Level: >+21 dBu unbalanced
Insert Connector: TRS 1/4"
Type: Unbalanced
Impedance: 100Ω, send -20Ω return
ANALOG OUTPUTS
Connector: Male XLR Pin 2 Hot and TRS 1/4"
Type: Servo-balanced/unbalanced
Impedance: Balanced 120Ω, unbalanced 60Ω
Maximum Output
Level: >+21 dBu, >+20 dBm (into a 600Ω load)
DIGITAL OUTPUTS
Connector: XLR for AES/EBU
RCA for S/PDIF
Impedance: 110Ω for AES/EBU
75Ω for S/PDIF
WORD SYNC INPUT/OUTPUT
Connectors: BNC
Input Impedance: 75Ω terminated by internal jumper
Input: 96, 88.2, 48, or 44.1kHz word clock
OUTPUT: 96, 88.2, 48, or 44.1kHz word clock
SYSTEM PERFORMANCE
DRIVE Control Range: +30dB to +60dB for Mic Input
-15dB to +15dB for Line and Instrument Inputs
LEVEL Control Range
Analog and Digital): -15dB to +15dB
LINE: Selects between microphone and line inputs
Phantom Power: +48V
PAD: 20dB pad
PHASE: Reverses pins 2 and 3 of the microphone input XLR
LOW CUT: 75Hz, 12dB/octave high pass filter
Frequency Response: <10Hz to 75kHz
THD + Noise: 0.35% typical at +4dBu out, 1kHz, 40 dB gain
Interchannel Crosstalk: Typically 80dB, 20Hz to 20kHz
ANALOG TO DIGITAL CONVERSION
Type: dbx® Type IV A/D Conversion System
Sample Rate: 96, 88.2, 48, or 44.1kHz 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: 107dB typical, A-weighted, 22kHz bandwidth
POWER SUPPLY
Operating Voltage: DO: 120VAC 60Hz, 100VAC 50/60Hz
EU: 230VAC 50/60 Hz
Power consumption: 35W
PHYSICAL
Dimensions: 1.75'' x 7.75'' x 19'' (4.5cm x 19.7cm x 48.5cm)
Power consumption: 6.89 lbs (3.17kg)
Note: 0dBu = -16dFS, 0dBu-0.775Vms
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