DISTRO 5.5 B    
  top view
  back view


The rear panel contains the XLR input connectors LINE, MIC1, MIC 2.

XLR Line input

XLR Line input is an electronically balanced with RF filter. A male and female connector allow a parallel connection to another unit.
The knob LINE/MASTER controls the general output level of the DISTRO 5.5B.
The toggle switch PIN 1 LIFT remove the ground from the line input source.
The toggle switch INPUT SELECT is used to select between MIC1-MIC2 or LINE input.
A yellow LED indicates which input is selected.

XLR microphone input MIC1, MIC2

Two electronically balanced inputs with RF filter.
Level control for gain up to 50db.
A limiter is used so the subsequent stage of amplifier will not be saturated.
Switch PAD attenuates the signal from the microphone of 20 db.
Switch ¨Phantom¨, provides 15 volts on pin 2-3 for condenser microphones.
LEVEL, provides gain adjustment for MIC pre-amplifier.

Tone generator

Switch TONE, will activate a 1K hertz tone generator for calibration of output level. A LED indicate that the tone is ON. The action of this switch cuts the signal going to the Master volume.

Warning: Turn down Master control before switching on the Tone generator.


The DISTRO 5.5B is equipped with a Universal Switching Power Supply. The AC power source could be in the range of 90 to 264 Volts at 47 to 67 Hz.


The front panel contains all the connectors for the media to capture a balanced signal from the DISTRO 5 .5B.
We see 8 XLR connectors, 2 Stereo jacks ¼ TRS, 2 Stereo jack 1/8 TRS..
For each of these output we have a toggle switch to select the output level that the media needs for his recorder : MIC or LINE level.
A toggle switch PIN 1 LIFT is used to isolate the ground between the DISTRO 5.5B and the media recorder. This become necessary when we have HUM or ground loops issues.
We also have 2 RCA connectors for handy hook up to a commercial recorder. These outputs are –10db and they are not controlled by the master control level.


On the right side of the DISTRO 5.5B near the VU METER, a switch allows the signal source, INPUT or OUTPUT, to be selected for listening on the headphone output and for monitoring on the VU meters.
Indication on the VU BARGRAPH will be considered as a peak reading and the value on the meter as average.
Two LED V+ and V- will indicate that the power supply gives a +/- 15 volts


Place the DISTRO 5.5B on a table for easy access for the media.
Connect the power cord to appropriate AC outlet.
LED’s V+ and V- in the front and at the back will turn ON, indicating that the DISTRO 5.5B is powered properly.
With an audio console, use a AUXILIARY output to feed the DISTRO into the line input.
Link your console with a good XLR MIC cable.
Set up a tone generator routed to that AUX.
Calibrate that AUX output for a 0db reading on the console.
Position the INPUT SELECT switch on the DISTRO to LINE, a yellow LED will turn ON besides that XLR connector.
Position the INPUT/OUTPUT switch on the front panel to INPUT. You should read 0db on the VU meters. ( 0VU is equal to +4dbm on professional console)
If not, you have a bad cable or connection
Position the INPUT/OUTPUT switch on the front panel to OUTPUT position and adjust the LINE/ MASTER LEVEL for a reading of 0 db. You have now calibrated you console with the DISTRO. The reading on the console is identical as on the DISTRO.

If you use the MIC input:
to begin, set up the knob LINE MASTER LEVEL at 2 o'clock position.
Connect a microphone into the MIC1 or MIC2.
Adjust the LEVEL of that MIC to read 0db on the meters. If necessary, readjust the LINE MASTER LEVEL to reach nominal level 0VU.
A PAD switch will attenuate the MIC input signal level by 20db.
A PHANTOM switch will give a 15 volts on pin2 and pin3 on the XLR MIC input for condenser microphone.

On a stand alone mode, you can use the internal tone generator and do the same procedure as using an external console with tone generator.

NOTE: Be carefull of the level, could be harmfull if someone has headphone on their head! Turn down Master control before switching on the Tone generator. Back to DISTRO 5.5B page

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