Genz-Benz shuttle 3.0-8t ユーザーガイド

FRONT PANEL

INPUT – The SHUTTLE 3.0® is equipped with a standard ¼” unbalanced input. The input sensitivity range is from

300 mV to 1.25 volts. The input impedance is >500k ohms. The input stage contains a precision high order ac-

tive high pass filter (more effective and less intrusive than the more common 6 dB filters) and an “RFI” filter (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 amplifiers.

INPUT SIGNAL MUTE SWITCH – With this mute switch, you can place the amplifier (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.

PREAMP VOLUME CONTROL – The preamp is designed to accept a wide range of input levels. This control sets

the input sensitivity of the preamp to the output of your bass. The volume of the signal is also controlled by the

Master Volume control, and is sampled after the eq stage in the event large amounts of eq jeopardize undistorted

preamp operation. If the red overload “OL” LED flashes, the FET preamp stage is beginning to be overdriven. To re-

tain a clean tone, increase Master Volume control and reduce the Preamp Volume control to eliminate input preamp

overload. The control should be set so that the O/L LED just flashes with the hardest notes played. A “hotter” Active

bass will require that this control is run lower than when using a bass with Passive pick-ups.

“O/L” LED – This “Over-load” LED shows the operating status of the preamp stage. When this LED flashes, over-

driving of the input gain stage is occurring. Adjusting the Preamp Gain and Master Volume controls will affect the

over-load condition.

SETTING YOUR INPUT SIGNAL – Use the following guidelines to set your amplifier input stage for the type of bass

used and your personal playing style.

·Set your instruments controls (volume and tone) where you normally prefer to run them.

·Begin with the Channel Volume setting at “0” and your amplifier EQ positions centered at 12 o’clock.

·Begin turning the Volume control up to a level in which the O/L LED is just illuminating with your hardest

notes played. It is okay for the RED LED to flash somewhat BUT it should not be on constantly. Passive

basses may not light the LED unless turned all the way up. This is not necessary, a setting of 12 o’clock is

usually recommended.

·Now set your Master volume settings for the desired output level (loudness) that you wish to produce.

·Next turn your attention to the EQ section and make the adjustments for the desired tone. Because this is

an active EQ network any large settings of cut or boost will affect the gain level of the preamp and the O/L

lights at the input stage.

·After setting your EQ it may be necessary to go back and adjust your input level down accordingly. It

should be noted that the Global Signal Shape circuits will not affect the input level BUT will affect the Master

output level and clip indicator if used with extreme settings.