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M I C   I N P U T :  

Floating balanced, Pin 2 Hot

Impedance 

~ 4.2k

Ω

 Balanced

Maximum Level 

0.25Vrms, Gain = 30dB

Gain Adjustment Range 

+0dB to 60dB 

Phantom Power 

+48VDC, applied to XLR pins 2 and 3 through  

 6.81k

Ω

 resistors  

 

CMRR 

>40dB, typically 55dB

EIN 

-125dBu, 22Hz-22kHz, 150

Ω 

source impedance 

 

  

L I N E   I N P U T :  

Floating balanced, TIP Hot

Impedance 

10k

Ω

 unbalanced, 20k

Ω

 balanced 

 

Maximum Level 

>+21dBu, balanced or unbalanced 

 

Gain Adjustment Range 

-15dB to +45dB 

CMRR 

>40dB, typically 55dB 

 

 

 

I N S E R T   ( 1 / 4 ”   T R S ) :

  Normalled: tip is Send, ring is Return 

Ring: Impedance 

>5k

Ω

   

Maximum Level 

>+21dBu

Tip:   Impedance 

100

Ω

   

Maximum Level 

>+21dBu, >+20dBm (600

Ω

 load)

Noise 

<-89dBu, unweighted (20Hz-20kHz);  

 

 

LINE GAIN Control set to 0dB  

Distortion 

<0.01% THD, 20Hz-20kHz, +10dBu

 

 

   

LINE OUTPUT (1/4” TRS): 

Balanced/Unbalanced

Impedance 

100

Ω

 unbalanced, 200

Ω

 balanced

Maximum Level 

>+21dBu, >+20dBm (600

Ω

 load) 

Gain Adjustment Range 

-30dB to +10dB   

Noise 

<-85dBu unweighted (20Hz-20kHz); Both Gain Controls 

 

set for 0dB, all processing controls OFF

Frequency Response 

20Hz - 20kHz, +0.5/-0.5dB 

Distortion 

<0.08%THD, 20Hz-20kHz, +10dBu, all Processing  

 

Controls OFF

 

 

   

C O M P R E S S O R :

Threshold Range 

-40dBu to +20dBu

Threshold Characteristics 

OverEasy®

Compression Ratio 

>4:1 For input levels beyond 20dB above threshold

Maximum Compression 

30dB 

Attack Time 

Program-Dependent; >1s for small level increases,  

 

down to 10ms for large increases

Release Time 

Program-Dependent; adjustable between approximately  

 

1dB/Sec and 75dB/Sec  

Distortion  

Typically <0.05%THD, 20Hz-20kHz, 15dB G/R, +10dBu 
Output, DENSITY @ 0

SMPTE Intermodulation Distortion  <0.05%; 60Hz/7kHz 4:1, 15dB G/R, +10dBu Output Level,  
 

 

 

DENSITY @ 0

D E - S S E R :

Characteristic 

Wideband Gain Reduction 

 

 

Frequency Range 

800Hz to 10kHz High Pass, 12dB/octave 

Release Time 

Program-Dependent approximately 1ms/dB

 

  

 

E N H A N C E R :

HF Detail Characteristic 

 Program-controlled shelving equalizer, approximately 
15dB maximum HF boost

LF detail Characteristic 

 Bell-shaped boost @ 80Hz, bell-shaped cut @ 250Hz, 
ratio is approximately 2:1

 

E X P A N D E R / G A T E :

Threshold Range 

OFF to +15dBu 

 

Expansion Ratio 

Adjustable 1.5:1 to 10:1 

 

Maximum Depth 

>50dB 

 

Attack Time 

Program-Dependent, approximately 2ms (at maximum  

 attenuation) 
Release Time 

Program-Dependent, approxiamtely 10ms/dB  

 

D Y N A M I C   R A N G E :

 

Typically 105dB

P O W E R   S U P P LY :

    

Power Requirements 

15 Watts

Operating Voltage 

USA: 120VAC 60Hz, 100VAC 50/60Hz;  

 

 

EU: 230VAC 50/60Hz 

 

Operating Temperature 

0°C to 45°C (32°F to 113°F)

P H Y S I C A L :

 

Dimensions 

1.75” x 5.75” x 19” (4.5cm x 14.6cm x 48.5cm) 

Weight 

Net Weight: 4.5 lbs/2.04 Kg      

Shipping Weight:  

6.54 lbs/2.97 Kg

Specifications

s

s

s

s

s

dbx engineers are constantly working to improve the quality of our products. Specifications are, therefore subject to change without notice.

 

Channel Strip Processor

286s Mic Preamp

dbx Professional 
Products

8760 S. Sandy Pkwy.
Sandy, Utah 84070

801.568.7660 

PHONE 

801.568.7662 

FAX 

801.568.7583 

INT’L FAX

[email protected]

www.dbxpro.com

Part number: 18-0842 

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