Tube Channel Strip w/Digital Out

IT’S TIME TO CHANGE THE CHANNEL! The standard of excellence for channel strip processors has just been raised once again. From the world leader in digital signal processing comes the new 376 Tube Channel Processor with digital output capabilities. dbx® Professional Products has been paving the way for audio excellence for more than 25 years, and with the creation of the 376, the drive continues. The 376 has taken the essential tools needed for channel strip processors and has greatly added to the feature list, making it an all inclusive toolbox that offers all of the effects required. With an effect menu list that includes such standard features as: a tube preamp section, 3-Band parametric EQ section, Compressor, De-Esser and digital outputs, the 376 is the perfect companion piece for recording and tracking vocals and mic’d applications in the analog and digital domain.

The 376 Tube Channel Strip w/Digital Output is the latest addition to the Silver Series family. The 376 puts the best of both worlds into one affordable package by combining the warmth of the vacuum tube, with the proprietary dbx Type IV® conversion system. The 376 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. In addition, the 376 also offers digital output capabilities in both AES/EBU, and S/PDIF formats as standard features. 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 LED meters provide a clear and concise visual of the signal processing at a glance. The rear panel includes both mic and line inputs and outputs, word clock sync input and output, insertion jack 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 376 lives up to the uncompromising standards of dbx Professional Products.


·       Tube microphone pre-amp

·       200V tube plate voltage

·       Selectable mic/line switch

·       +48 Volt phantom power

·       3-Band Parametric EQ

·       Compressor

·       De-Esser

·       Front panel instrument input

·       Drive meter LEDs

·       Threshold and De-Esser meters

·       8 segment analog or digital meter

·       Type IV® conversion system

·       Selectable sampling rate (96, 88.2, 48, 44.1kHz)

·       24, 20 and 16 bit wordlengths

·       AES/EBU and S/PDIF digital outputs

·       Selectable dither and noise-shaping algorithms

·       Word clock sync input and output


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)

Insert Connector

TRS 1/4" Unbalanced

Insert Impedance

100Ω (SEND), 20kΩ (RETURN)

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

-20dB to +20dB

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

EQ Low Frequency

80 Hz, shelving filter

EQ High Frequency

12 kHz, shelving filter

EQ Mid Frequency

Sweepable from 100 Hz to 8 kHz, bandwidth 1.5 octaves

EQ Gain

(all bands) Sweepable from –15 to +15 dB

Compressor Threshold Range

-40 dBu to +20 dBu

Compressor Threshold Characteristic

Selectable OverEasy® or Hard Knee

Compressor Ratio

Variable; 1:1 to Infinity:1; 60 dB maximum Compression

Compressor Attack Time

Program-dependent; Typically 5 ms (SLOW disabled), 15 ms (SLOW enabled) for 15 dB Gain


Compressor Release Time

Program-dependent; Typically 50 dB/sec (SLOW disabled), 8 dB/sec (SLOW enabled)

De-esser Characteristic

Wideband gain reduction

De-esser Frequency Range

800 Hz to 10 kHz High Pass

De-esser Release Time

12 dB/octave program-dependent; approximately 1 ms/dB

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


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