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ACTIVE EQUALIZATION – The SHUTTLE
®
9.2 contains an active 3 band equalizer with sweepable parametric mid range
frequency control. This equalizer, similar to those found on professional sound consoles, is a very useful tool. The low
frequency EQ section is an 80 Hz shelving curve with 15dB of cut or boost. The high frequency EQ section is a 4 KHz
shelving curve with 15dB of cut or boost. The parametric sweepable-mid frequency section features 15dB of cut or boost
with a bandwidth approximately 1 octave wide. The center frequency of this lter is continuously user adjustable from 150
Hz to 2 KHz with a single control. This lter is typically (but not always) used to reduce or remove offending frequencies
in the instrument’s pick-up response, or boost response to achieve a particular voicing. Spend some time experimenting
so that the process becomes creative as well as corrective. Note that our active equalizers are very wide response and a
little bit can go a long way.
SIGNAL SHAPE – The SHUTTLE
®
9.2 is equipped with 3 Signal Shape circuits. The L.F. BOOST adds low frequency
peaking gain in the 38-67 Hz band. This lter is especially effective when used with a 5 string bass. The MID SCOOP
switch generates midrange cut centered at approx. 600 Hz, the H.F. ATTACK adds a peaking high frequency boost in the
2.25-8 KHz band. LED indicators are provided to visually show when each lter is engaged. Each lter Q (bandwidth)
is optimized for its particular functions and is different for each lter. These functions are also foot-switchable from the
optional 4 button foot switch. The switches on the amplier’s faceplate must be in the “out” position for the footswitch to
work properly.
MASTER VOLUME – The master volume control adjusts the overall volume of the amplier and the effects return.
Typically, best results are obtained when this control is operated between the 9:00 and 3:00 positions.
MASTER SECTION STATUS INDICATORS -
• The “POWER” light indicates that the amplier is ON and the low voltage power supplies are active.
• The red “PROTECT” LED indicates that the amp is in “protect” mode. This LED may ash during power turn-on and
turn-off. This is normal. It will also illuminate during any internal fault condition. If this happens, turn the amp off and
consult a repair technician.
• The red “THERMAL” LED indicates that the amplier has over-heated, engaged the protection circuit and shut down.
This circuit is self-resetting when the offending condition is corrected, i.e., blocked fan vents, stuck fan, 2 ohm operation,
etc.
• The blue “SIGNAL” LED indicates that the power amplier is receiving signal (over several watts output) and is
performing properly.
• The “PEAK” LED indicates that the power amp is near its maximum power. Under high output conditions it is normal for
this LED to light with the strongest pulses of the signal. Driving hard beyond this point will cause the amplier to
gradually begin to clip which may become audible.
3DPM™ --- 3 DIMENSIONAL POWER MANAGEMENT --- Our proprietary 3DPM™ technology insures greater and
more solid sounding output while retaining the feel and playability of a more traditional tube based power amplier. When
driving the power amp hard the player can feel increased heft and girth of the individual notes, while maintaining dynamics
and articulation. The result is an amplier that achieves a more 3 dimensional tone and feel, like a tube amplier power
section, without the anemic atness other amplier designs can exhibit.