G-Lab Dual Vintage Overdrive, User Manual

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Considering the signal path , DVO can be connected between a guitar and
GSC (all effects connected to GSC will be placed post this overdrive), or
between GSC and an amp (all effects connected to GSC will be placed pre this
overdrive), or to the one of GSC loop (DVO can be bypassed and some effects
can be placed pre and some of them post this overdrive).
Rules of overdriving
Overdriven tone is one of the basic tone used by guitar players for playing
different kinds of music.
Slightly overdriven tone is the common used guitar sound. To get slightly
overdriven preset the BOOST A and BOOST B switches should be set to zero
and the GAIN control should be set to minimum. Equalizer controls should be
set at the central position (to “0” value). Tone testing should be done at the
medium volume. Guitar volume controls should be set to maximum. Playing
the guitar
, test tone by increasing the GAIN. At some position of the GAIN
knob there will appear the effect of „cutting” sounds with higher amplitude
and later, the effect of adding harmonics to the tone what is the overdrive
effect. It can be clearly heard by programming for example: less GAIN on the
CH 1 than on the CH 2 and more VOLUME on the CH 1 than on the CH 2
(BOOST A and BOOST B switches on both channels should be set
identically) and during songs played these two channels should be switched.
In case of guitars with low signal converters (e.g. single type) this test may
require switching on BOOST A or BOOST B switches.
To get well-defined overdriven tone , one of the active channel BOOST
switches should be switched on. BOOST A and BOOST B offer different
overdriving characteristics. BOOST A supply the tone with more middle and
treble and BOOST B with more bass. To get more bass slightly overdriven tone
only BOOST B should be switched on and GAIN should be lowered to the
required level.
Then can be tested what is the influence of equalizer controls onto the tone.
You should realize that BASS and TREBLE boosting switches (+3dB) are
operating on the overdriven signal. Switching them on produce different effect
than using BASS and TREBLE controls. For typical guitars with humbacker
pickups the best results give setting TREBLE control at -3 dB to 0 dB and
setting on +3 dB TREBLE switch at the same time.
The main factor determining overdriven tone is a frequency characteristics of
amplifying elements between DVO and a speaker, as well as a speaker alone
(understood here as a speaker or a set of speakers in a cabinet). If DVO is