Blackstar Artisan 30 - Manual (Page 4)

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Introduction
Thank you for purchasing this Blackstar Artisan 30 handwired combo.
The Artisan 30 is the result of countless hours of painstaking Research and
Development by our world class design team. Based in Northampton (UK), the
Blackstar team are all experienced musicians themselves and the sole aim of the
development process is to provide guitarists with products which are the ultimate
tools for self expression.
Realising the skills and expertise of over thirty years of valve guitar amplifier design
experience, the Artisan 30 represents a new level in handwired design, tone and
build quality.
All Blackstar products are subject to extensive laboratory and road testing to ensure
they are truly uncompromising in terms of reliability, quality and above all TONE!
If you like what you hear and want to find out more about the Blackstar range of
products please visit our website at www.blackstaramps.com.
Thanks!
The Blackstar Team
Features
The Artisan 30 is inspired by some of the most revered combos in guitar amplifier
history. The design is in the classic 30W / 2x12 combo format and is very simple to
use and yet highly flexible in functionality and tone.
The Artisan Series of handwired amplifiers represents the absolute highest standard
of craftsmanship and boutique tone. With the emphasis on simplicity and sonic
purity, every feature has been refined to provide the artist with the widest range of
reference vintage tones. This is achieved by the design of electronic circuits that
work in harmony with the finest components and materials available.
The Artisan 30 is built to last a lifetime and effortlessly combines vintage style and
rugged, road tested reliability. The point-to-point tag board construction, welded
steel chassis and finger-jointed birch-ply cabinet are complemented by beautiful
vintage red Tolex and etched aluminium panels.
Technical Information
Power Amplifier
The Artisan 30 power amplifier uses four EL84 power pentode valves in Class A. The
EL84s used are graded in terms of quiescent operating point and transconductance
giving excellent hum performance and dynamic feel.
The Artisan 30 power amplifier operates in two modes, namely pentode (30W) or
triode (10W), depending on the setting of the Power Amplifier Mode control.
In pentode mode the power amplifier has a dynamic response which is rich in
bell like harmonics and has a beautiful ringing top end. The triode mode allows
the generation of the critical power amplifier harmonic distortion at a much lower
volume but is darker and more mellow sounding with a rounder top end. The lower
power setting is particularly effective for home and studio use.
The power amplifier is further enhanced by using a cathode coupled phase splitter
to provide the best possible balance in the power amplifier drive and hence superb
dynamic response. In keeping with the vintage sonic signature of the Artisan 30,
the use of a valve rectifier adds compression to the power amplifier response and
is critical in generating its feel and responsiveness. The GZ34 valve rectifier used in
the Artisan 30 is also found in other classic designs.
With an amplifier that is built to last reliability of the electronic circuitry is essential
and therefore all the other power amplifier and power supply components are also
over-specified for the best possible reliability.
Preamplifier
Channel 1 – The EF86 Channel
Hi/Lo inputs provide perfect matching either directly to the guitar (high sensitivity) or
for connection to higher output effects pedals (low sensitivity).
This channel is based on the EF86 preamplifier pentode valve. Originally, this valve
was most commonly used in high-end audio applications due to its high gain, low
noise characteristics. However, in very early American guitar amplifier designs a
pentode was used in the preamplifier circuit. The use of a pentode in these early
designs provided unique gain and compression characteristics which make these
amplifiers so revered for studio use today.
In keeping with the reference American designs, the extra gain of the EF86 of the
Artisan 30 allows the power amplifier to be driven harder for more compression and
rich harmonic distortion. The EF86 also adds its own particular compression and
distortion flavour to this channel making Channel 1 a dream to record with.
The 5-position Bass Shape switch controls the bass drive into the power amplifier
and enables the user to quickly and easily select from a wide palette of tonal options
from bright and glassy through to fat and smooth.
The tone control circuit is unusual in its position across the anode of the EF86.
This retro type of design offers a complex response that works in harmony with the
dynamics of the player’s attack.
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