Dbx 386 Manuel D’Utilisation

®

This unbalanced high-impedance input connection is used to insert an instrument signal direct-
ly into the preamp.  Use the LINE switch to make instrument input or the rear panel line input
active. Plugging into the instrument jack will override the rear panel 1/4” input jack (line input
must be selected).

This switch, when lit, selects the rear line input or front panel instrument input (when some-
thing is connected) as the source signal of the 386.

This control sets the amount of gain at the input of the vacuum tube stage.  The range of gain
available is +30 to +60 dB (-15 to +15 dB when LINE INPUT is selected). 

This LED will light 3dB prior to input stage clipping.

This switch activates phantom power for condenser microphones on pins 2 and 3 of the XLR
mic input.  You should connect your microphone before turning on the phantom power to pre-
vent damage to your microphone.  Be sure to always lower levels prior to using the the +48
Volt Switch. 

This switch attenuates the microphone input signal by 20dB. 

This switch inverts the phase of the incoming signal at the Mic input by swapping pins 2 and
3 on the XLR connector.

Note- The +48 Volt, 20dB Pad and Phase functions are only available when the microphone input
is in use.

This switch places a 12 dB per octave shelving high pass filter in the signal path.  The knee
frequency of the Low Cut filter is 75 Hz.  This filter is very useful for removing low frequency 
rumble or handling noise from a microphone input signal.

This knob controls the overall level of the analog output signal, and ranges from -15 to +15dB. 

Section 1

386