Welcome To Vox - Vox VR15 Manual De Usuario

Many thanks for adding the VOX VR15 amplifier to your sonic arsenal. It was designed by our UK based VOX engi-
neering team and built by our state of the art, vertically integrated manufacturing facility and we're sure it'll give you
countless hours of great guitar tones that will feel as good as they sound! To insure a long and happy relationship with
your amplifier, please read this manual at least once, and (as they say), "use the product as directed." Keep the
manual for future reference after you've read it.
WHAT IS VR?
The VR series are designed, as to what we believe are
the next generation of "hybrid" guitar amplifiers.
What does HYBRID mean, you may ask? Well, basically
"hybrid" means that it utilizes a mixture of technologies
— in this case those technologies are Tube and Solid
State.
The Preamp stages consist of discrete transistors for
sound generation, and integrated circuits (op-amps) to
do signal management that would not be done effectively
with transistors alone — i.e. channel switching, etc.
The Power amp stage uses a 12AX7 vacuum tube (or
valve, depending where you live in the world) in a con-
figuration that we at VOX call Valve Reactor.
The patented Valve Reactor power amp technology is
used in all Valvetronix products. It was originally designed
for the award winning VOX Valvetronix modelling guitar
amplifier range, and now we have taken that same tech-
nology and further revised it into the format that is built
into your VR15 amplifier.

Welcome to VOX

HOW DOES IT WORK?
It basically works by having each half of the 12AX7 (the
12AX7 tube is actually two identical tubes in one glass
tube a.k.a. dual triode) and configuring it to work as a
small tube power amplifier. This circuit provides all the
tonality and feel of an all-tube power amp. Obviously this
"small" power amp would not be very loud if it was con-
nected directly to a loudspeaker — therefore the tube
circuit is connected to a larger, completely transparent
solid-state power amplifier, that is run very cleanly so
that it does not add its own colouration to the tube signal.
This power output amplifier also has some special cir-
cuits that feed the loudspeaker impedance information
back to the tube power amplifier in order to give it the
loose sound & feel that an all-tube amp does.
SO WHAT DOES THIS MEAN?
We think that the VOX VR amplifier range brings you su-
perb tone (vintage & modern) that includes the high har-
monic content and compression that goes all the way
back to the original VOX AC15 & 30 amplifiers that were
created more than 40 years ago, and are still revered to
this day.