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Vox Valvetronix Tone Lab Modelling Valve Guitar Preamp

£210.00

Vox Valvetronix Tone Lab Modelling Valve Guitar Preamp In great condition with power supply- no box This modelling preamp achieves a variety of realistic amp tones by combining DSP processing with real analogue gain stages. The Vox Valvetronix Tone Lab is a spin-off from Vox's AD60/120VT modelling amplifiers, which take…Read More

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1 in stock

Vox Valvetronix Tone Lab Modelling Valve Guitar Preamp

In great condition with power supply- no box

This modelling preamp achieves a variety of realistic amp tones
by combining DSP processing with real analogue gain stages.

The Vox Valvetronix Tone Lab is a spin-off from Vox’s AD60/120VT
modelling amplifiers, which take the approach of combining digital modelling
and signal processing with both solid-state and analogue amplification stages,
rather than trying to emulate absolutely everything digitally. Conceptually, the
Valvetronix Tone Lab fits into the same camp as products like the Line 6 Pod
(amp/speaker modelling plus effects) and can be used either for DI recording or
to feed an amplifier for live performance. However, whereas the Pod takes the
all-digital approach, the Tone Lab includes a miniature power-amp stage based
around a 12AX7/ECC83 dual-triode tube, where some clever ‘pseudo-transformer’
circuitry has been used to make this influence the sound much as a real power
stage would. Such innovative technology has to be given a fancy name, and in
this case it is the Vox Valve Reactor.

A built-in valve gain stage adds extra realism to many of the
amp models.Much of the effort has gone
into recreating the effect of an output transformer without actually having
one, an important factor given that the output transformer and the way it
interacts with the loudspeaker load forms a crucial part of the tube-amp sound.
The Presence control on those amps that feature one also relies on the output
transformer — rather than simply being EQ as you might imagine, Presence
controls adjust the amount of negative feedback in the power amp section from
the output side of the transformer, which means that the effect is actually
quite complex. Furthermore, this miniature power stage automatically switches
between Class A and Class AB depending on the amp model selected, and the
output tubes of the original amp are shown in the display window for whatever
model is active. Vox AC15s and AC30s used Class-A circuits, whereas the
majority of Marshall and Fender designs, other than very low-power models such
as the Fender Champ, have Class-AB push-pull output stages. Not only does the
correct choice of power amp characteristic affect the sound, but it also
changes the way the guitar feels to the player, which is a vitally important
element of any guitar amplification system, and one that probably makes no
sense at all to keyboard players!

A rear-panel slide switch selects between Amp and Line, where
the Amp output is voiced for use with a guitar amplifier (seemingly with quite
a lot of top cut to compensate for the top boost added within most guitar amps)
and Line is designed for DI recording. The unit may also be used in mono by
connecting only the left output.

Preceding the mini tube power stage is a digital modelling
system that provides amp modelling, speaker modelling, stomp-box modelling and
a post-amp effect section where the user can add modulation, delay and reverb
at the same time. Unlike the Line 6 approach, there is no dedicated mic
modelling stage. There are five types of modulation effect to choose from,
three delay types, and three types of reverb, all with simple pedal-style
editing via three front-panel knobs. In the pedal section are ten effects, comprising
Compressor, Acoustic Emulation, Vox Wah, Auto Wah, U-Vibe, Octave, Treble
Boost, Tube OD, Fat OD and Fuzz, again all editable via the same three knobs.
The unit also has an integrated noise gate that can be set differently for each
patch, and a built-in chromatic guitar tuner.

The Tone Lab has the usual stereo analogue outs on balanced
jacks, but also offers a digital output via optical S/PDIF, plus MIDI In and
Out jacks for patch dumping or parameter editing using the free (but PC-only)
Sound Editor software. The digital signal at both the input and output
converters is at 20-bit resolution and has a sampling rate of 44.1kHz. A
network-style socket labelled Vox Bus is used to connect an optional floor
controller that simplifies patch changing in live performance as well as giving
access to the tap tempo feature, the tuner and two pedals for controlling
volume and wah. Note that the tuner’s reference ‘A’ can be recalibrated between
438Hz and 445Hz.

condition

Excellent

make

Vox

model

Valvetronix Tone Lab Modelling Valve Guitar Preamp

shop_name

Rockstock.store