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ULTRAROC GX110
1.1 The design concept
The philosophy behind BEHRINGER products guarantees a no-compromise circuit design and employs the
best choice of components. The operational amplifiers used in the ULTRAROC are exceptional: they boast
extreme linearity and very low distortion characteristics. To complement this design, the choice of components
includes low-tolerance resistors and capacitors, high-quality potentiometers and several other stringently selected
elements.
The ULTRAROC uses SMD technology (Surface Mounted Device). These subminiature components adapted
from aerospace technology allow for an extreme packing density to further improve the overall reliability.
The super-robust steel-plate enclosure of your ULTRAROC, with its generously dimensioned power supply,
ensures that your GX110 will never fail on the stage – even when the going gets tough. The enclosure is made
of high-grade and non-polluting MDF wood, which consists of multiple tongued layers.
1.1.1 VIRTUBE technology
Tube preamps usually have three to five triode stages in series producing various degrees of distortion,
dynamic compression and frequency response modification. In addition to the characteristic curve, along
which the signal is distorted, also the order of filters and distortion stages play a vital role. While clean and
slightly distorted sounds may be a pleasure to hear when the signal has lots of bass prior to the distortion
stage, this configuration would lead to a muddy, fuzz-like sound when hi-gain settings are used. For this
reason, tube amps have passive, and usually simple filters switched between the individual amplifier stages.
These filters determine which frequencies contribute to the distorted sound.
After the distortion stages, too, filter circuits are used to provide a perfect blend of output signal and generated
harmonics. Our VIRTUBE circuits have been optimized to mimic this sophisticated interaction with solid-state
components. EQ and filters between the single stages are the same as those used in classical tube amps. The
non-linear characteristic curves are simulated by means of specific diode types. The result is an amplifier
that gives you sounds with a very pronounced tube character.
1.1.2 JENSEN loudspeaker
Since Peter Jensen produced the first loudspeakers in 1923 JENSEN reshaped the communications industry.
As the demand for new electric guitar and bass amplifiers increased, so did the need for JENSEN speakers
in the 50’s and 60’s. JENSEN represented the worldwide industry standard for speaker products and their
sound was in fact the sound of Rock ´n´ Roll. Still these vintage speakers are highly valued by top musicians
and collectors around the world. Famous american and british brands choose JENSENs for their top-of-the-
line products. There is no doubt about the tremendous impact the loudspeaker has on the sound of electric
guitar amplifiers. Consequently, JENSEN has put into production those legendary speakers again that
contributed so much to the history of modern music, using the most sophisticated and modern facilities
Europe has to offer. You will find them in top-of-of-the-line guitar amps.
1.2 Before you begin
Your BEHRINGER ULTRAROC was carefully packed in the factory and the packaging is designed to protect
the unit from rough handling. Nevertheless, we recommend that you carefully examine the packaging and its
contents for any signs of physical damage, which may have occurred during transit.
+ If the unit is damaged, please do not return it to BEHRINGER, but notify your dealer and the
shipping company immediately, otherwise claims for damage or replacement may not be granted.
Shipping claims must be made by the consignee.
Be sure that there is enough space around the unit for cooling and please do not place the ULTRAROC on high
temperature devices such as radiators etc. to avoid overheating.
+ Before you connect your ULTRAROC to the mains, please make sure that your local voltage
matches the voltage required by the unit!
1. INTRODUCTION