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IntroductionPanel TourSetupProgram/
Manual
Creating
and Storing
3
Apart from the vital
valve tone this ingenious
power amp design provides, it
also allows us to replicate
various “circuit characteris-
tics” that are unique to the all-
valve power stages of the
amps we’ve modelled. These
“characteristics” include:
Class A or Class AB opera-
tion, Presence and Reso-
nance (low end) control
circuitry (both found in the
negative feedback circuit that
some, but not all, valve power
amps have) and power output. Being able to match such vital characteristics helps
ensure that each and every one of our models is as tonally authentic as possible -
as opposed to the usual “close but definitely no cigar” norm of digital modeling.
And just so you know, this patented in USA power amp technology is unique to
VOX Valvetronix.
AN OVERVIEW OF ToneLab
Let’s talk about how ToneLab is structured.
SIGNAL ROUTE
When you plug into ToneLab the signal passes through the following stages.
You might want to glance at the explanations in “A Guitarist’s Guided Panel
Tour” (p.5) while you read this section.
STRUCTURE
You will perform or create sounds using one of ToneLab’s two modes; Program
Select mode or Manual mode.
Additional functions are provided by UTILITY and GLOBAL modes (where you
can make settings for the optional foot controller and for MIDI), WRITE mode
where you can save your original programs, and TUNER mode which lets you
tune your guitar. (To access these modes, just press the corresponding but-
ton.)
VOX VALVE REACTOR
FEEDBACK
CIRCUIT
(WITH OR W/O
PRESENCE &
RESONANCE)
REACTOR
AMP
USING
CONSTANT
CURRENT &
REACTIVE
FEEDBACK
MODEL
DEPENDENT
12AX7 (DUAL TRIODE)
PUSH–PULL OUTPUT
PREAMP
OUTPUT TRANSFORMER
CLASS A OR AB
MODEL DEPENDENT
PHASE
INVERTER
DUMMY
SPEAKER
12AX7
(ECC83)
12AX7
(ECC83)
BIAS
BIAS
PEDAL
EFFECTS
AMP MODELS
16 TYPE
GAIN
VALVE REACTOR
CLASS A
CLASS AB
POWER AMP
AMP/
LINE
SW
CABINET
MODELS
10 TYPE
VR GAIN
PRE AMP
CH
VOLUME
MODULATION
DELAY
REVERB
EFFECTS