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Vidur Tube Pre-amplifier

Owner’s Manual

(v1.0)

Index

Front

Input……………………………… 1
Pad control knob
Selectable sound signatures
Mute button
FX loop controls………………… 2
FX button
EQ controls…………………….... 3
EQ button
Master

Back

Tuner out……………………….... 4
FX loop
Line out…………………………... 5
Footswitch
Main outputs
Voltage selector…………………. 6
Power cord receptacle
Power switch
Main fuse

How to replace tubes

…………….. 7

Appendix A - footswitch pinning

... 8

1
2
3
...
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Summary of Contents for Vidur

Page 1: ...ob Selectable sound signatures Mute button FX loop controls 2 FX button EQ controls 3 EQ button Master Back Tuner out 4 FX loop Line out 5 Footswitch Main outputs Voltage selector 6 Power cord receptacle Power switch Main fuse How to replace tubes 7 Appendix A footswitch pinning 8 ...

Page 2: ... on taste setting or the bass being used the filter can be enabled or disabled on the fly see below Note As this is a passive filter enabling it will decrease the perceived audio volume slightly Note The selectable sound signature is completely independent of the EQ state or setting Mute button The mute button on the Vidur has two functions 1 Pressing and releasing the mute button will toggle a tr...

Page 3: ...ing fully clockwise will only give the wet effects signal coming in from the FX return connector see back section below Anything in between is a mix of the wet and dry signal level The level control sets the overall volume being fed back to the the preamp from the FX loop This is especially useful when regularly switching between the clean and effects signal The level control will then act as the ...

Page 4: ...the EQ section When disabled the EQ is completely removed from the audiopath by means of a true bypass Signal level remains the same and the sound is comparable to when all EQ controls are centered This button is also available on the optional footswitch red EQ disabled green EQ enabled 2 When the mute button is pressed and held for two seconds the EQ button LED will show the current state of the ...

Page 5: ... out there shift the phase by 180 degrees When mixing a shifted return signal with the original signal the two will cancel eachother out completely or to a large extend By flipping the signal that s send to the effects to begin with the returned signal is in phase again with the rest of the preamp negating the issue So if you experience loss of perceived volume when mixing the wet and dry signal f...

Page 6: ...able by a vague tone or complete signal loss Flipping the phase button will usually resolve the issue Footswitch All three functions of the buttons found on the front panel mute fx loop and EQ can be controlled externally by the optional footswitch For convenience and the ability to use a widely available type of cable a RJ45 connector is used The control is fully parallel If you prefer to build y...

Page 7: ... The Vidur will take care of all processes normally associated with standby switches automatically Note After power on the preamp will enter a startup procedure The three LED s mute fx loop and EQ will indicate the progress After the startup the EQ LED will blink three times with the current selectable sound signature setting Main fuse This fuse cuts power to the entire amplifier in case of a seri...

Page 8: ...r preamp are lethal 1 Turn the preamp off 2 Unplug the power cord 3 Let the tubes cool down and the power supply drain and remaining energy for about 20 minutes 4 Remove the top cover 5 Carefully and slowly remove the tube you want to replace by gently pulling and ever so slightly wiggling it Easy does it 6 Press the new tube into the socket It can only go in one way Don t force anything 7 Replace...

Page 9: ...into the connector on the back of the preamp Connecting the switch contact 4 6 8 momentary to ground the function associated with that contact will toggle from enabled to disabled and vice versa When the function is disabled the LED contact goes LOW Two color LED arrangements are possible See examples below Examples Switch only Switch LED Switch 2 color red green LED coming soon deBont Amps Vidur ...

Page 10: ...http debontamps com info debontamps com 2018 deBont Amps deBont Amps Vidur Tube Preamplifier Owner s Manual 9 ...

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