Genz-Benz SHUTTLE 6.2 STL6-2-210T, SHUTTLE 6.2 STL6-2, SHUTTLE 6.2 STL6-2-12T User Manual
Owner’s Manual
Model# STL6-2
PRODUCT DESCRIPTION – The SHUTTLE®6.2 represents the 2nd generation
of our widely acclaimed SHUTTLE® series of light weight, high output bass
ampliers. This model has been designed with our unique ULTRA LIGHT
unied design process, yielding a 600 watt professional high powered tour-class
bass guitar amplier, weighing only 3.75 lbs! This 2nd generation SHUTTLE®
amplier now incorporates our unique 3-Dimensional Power Management
circuitry along with other enhancements like increased tube gain and high
efciency thermal 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. This compact design blends the best of analog
and digital platforms to produce the ultimate in warmth, punch and power.
Model# STL6-2-210T
The SHUTTLE®6.2 is equipped with a ¼” unbalanced instrument input, preamp
stage clip detector, mute switch with LED indicator, 12AX7 tube preamp with
extended range variable input gain, 3 switched signal shape lters with LED
indicators, 3 band active equalization with sweepable midrange frequency,
master volume control, proprietary 3DPM™ power management, ¼” tuner
output, aux. input, effects loop, balanced direct out with ground lift/pre-post/micline switches, headphone output, and 2 Neutrik NL-4 “Speak-On”™ speaker
jacks.
The power amp is a powerful, light weight Class D design and is supported by a
state-of-the-art high frequency Switch Mode Power Supply (SMPS), which does
away with the weight of a traditional power transformer. The SHUTTLE®6.2’s
power supply is usable from 100-240 volts, lending itself well to international
touring players.
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Model# STL6-2-12T
FRONT PANEL
INPUT – The SHUTTLE®6.2 is equipped with a standard ¼” unbalanced input. The input sensitivity range is from 40 mV
to 1.6 volts. The input impedance is >500K ohms. The input stage contains a precision high order active high pass lter
(more effective and less intrusive than the more common 6 dB lters) and an “RFI” lter (radio frequency interference)
to eliminate unwanted noise. The input gain stage consists of a feedback type variable gain circuit that provides wide
range, continuously variable gain with minimal noise. The preamp contains a FET input amp circuit based on our highly
regarded GBE series touring ampliers.
INPUT SIGNAL MUTE SWITCH – With this mute switch, you can place the amplier (and Direct Output) in standby
mode between sets, without having to change any of your amp settings. This feature can also be used for silent tuning
since the Tuner Out stays active when the mute is engaged. A red LED indicates when the Mute is active. This function
is also foot-switchable from the optional 4 button foot switch. The switch on the amplier’s faceplate must be in the “out”
position for the foot switch to work properly.
PREAMP GAIN CONTROL – This control sets the input sensitivity gain of the 12AX7 TUBE preamp to the output of
your bass. The volume of the signal is then controlled by the Tube Preamp Volume control and also the Master Volume
control. Note that overdriving the input tube gain stage may be a desirable tonal characteristic of your playing style.
This control, in conjunction with the Preamp and Master Volume controls, allows you to set the amount of tube overdrive
or clean tone your amp produces. The Gain structure is set in such a way that using the control beyond the 3 o’clock
position will provide dramatic increase in tube overdrive.
***It is generally recommended when using heavily distorted tones with a tweeter loaded cabinet, that you reduce the
high frequency settings on the amp or cut the tweeter level control of your cabinet.
“O/L” LED – This “Over-load” LED senses the operating status of the preamp and EQ stages. When this LED ashes,
overdriving of the input gain or EQ stage is occurring. Adjusting the Preamp Gain, Preamp Volume and EQ controls will
affect the over-load condition. Again, overdriving the tube pre-amp may be a desirable tone for your playing style.
PREAMP VOLUME CONTROL – This control sets the volume of the preamp after the Input and Tube Gain stages but
before the EQ, Signal Shape and Master Volume controls. Use this control in conjunction with the Gain Control.
SETTING YOUR INPUT SIGNAL – Use the following guidelines to set your amplier input stage for the type of bass
used and your personal playing style. These guidelines are just a suggested starting point.
1) Set your instruments controls (volume and tone) where you normally prefer to run them.
2) Now set all controls on the SHUTTLE® to 12 o’clock. It may be best to start with the Master Volume at 9 o’clock.
3) For a clean tone and using a Passive bass your Tube Gain and Preamp Volume settings may be set to similar
positions. For a clean tone using an Active bass your Tube Gain setting should be set more towards the 9 o’clock
position and the Preamp Volume at noon to 2 o’clock positions.
4) For overdriven tube tones with Active or Passive basses your Tube Gain setting will be set higher and the Preamp
Volume set lower. If driving the Gain Control towards maximum then the Preamp Volume should be set below the 12
o’clock position. Set your Master Volume for your desired overall volume. We suggest experimenting with different
settings for best results.
5) Now, turn your attention to the EQ section and make the adjustments for your desired tone. Because this is an active
EQ network, any larger settings of cut or boost will affect the gain level of the preamp and the O/L light.
6) After setting your EQ it may be necessary to go back and adjust your input gain level down accordingly. It should be
noted that the Global Signal Shape circuits will not affect the input gain BUT will affect the Master output level and PEAK
indicator if used with extreme settings.
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ACTIVE EQUALIZATION – The SHUTTLE®6.2 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®6.2 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.
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