Genz-Benz stl-max-12-0 ユーザーガイド

EFFECTS LOOPS – The serial “EFFECTS LOOP” jacks are provided to allow access to the signal for the purpose of

inserting signal processing equipment such as compressors, chorus, delay & reverb processors. Individual pre-EQ

loops are provided for the TUBE channel and the FET channel. An additional MASTER post EQ loop is provided for

the summed (TUBE + FET) signal. This loop may also be used as a PREAMP OUTPUT or POWER AMP INPUT patch

point. “SEND” (output) and “RETURN” (input) are nominal +4 dB level.

“Series” devices (such as compressors and gates) require that the signal flow out from the send jack on the amplifier,

through the processing device and back into the return jack on the amplifier. Parallel or mixed signal devices (such

as chorus, delay and reverb processors) require that the signal flow out of the send jack on the amplifier, through the

unit where it is split into a dry (unaltered) signal and a wet (processed) signal. On the processing unit, you will use the

mixed signal output to return the signals (both wet and dry) to the return jack on the amplifier. The ratio between the

wet signal and the dry signal is heard as the amount of effects added back to the original signal, which is controlled by

the mix knob (also called “balance”) on the effects processor. This may be a real knob (as in the Alesis® Microverb), or

software controlled (as in the Yamaha SPX-90, SPX900 or SPX 990). Set the input sensitivity on the effects processor

according to the processor manufacturer’s instructions.

The front panel MUTE switch will shut all of these outputs down when engaged.

HEADPHONE OUT – A 1/4” TRS jack is provided for connection to headphones for silent practice use. A speaker

load is not required. Do not connect this output to anything but headphones.

POWER AMPLIFIER – The SHUTTLE MAX 12.0 uses 2 state-of-the-art, Class D power amplifiers with high

frequency Switch Mode Power Supplies to achieve unprecedented high performance and lightweight packaging.

Switch Mode Power Supplies convert the AC line directly to high voltage DC, then the precision PWM inverter

creates a new AC power signal at a frequency approximately 2000 times higher than the original wall frequency

of 50/60Hz. This new high voltage, high frequency power signal is then fed into a custom high frequency trans-

former that steps the voltage down, a high frequency rectifier and high ESR filter capacitors finish the process off

by converting the high frequency AC signal back to the DC voltages that the amplifier’s internal circuitry uses. One

advantage of this conversion process is that the DC power supply rails are refreshed 1000 times more often than

in traditional linear supplies, thus reducing annoying hum in the audio signal. The high frequency switching is used

to reduce the size and weight of the magnetic and filter components while increasing the performance by recharg-

ing the power supply rails more often. The Class D amplifier uses digital PWM (pulse width modulation) techniques

similar to those in more familiar digital to analog converters to reduce the size and weight by a factor of 10 times

that of a comparably rated conventional Class AB amplifier. Essentially, a Class D amplifier converts the analog sig-

nal into a logic level PWM digital signal with a digital to analog converter, level shifts this PWM signal up to a higher

voltage and current and then reconstructs the analog signal by passing it through what is essentially a power digital

to analog converter. Additionally, we developed our own, proprietary limiting and signal processing techniques to

give a distinctly analog feel and sound to the class D platform. This system provides exceptional performance even

for low frequency applications such as bass guitar.

SPEAKER OUTPUTS – The SHUTTLE MAX 12.0 utilizes dual power amp modules (Amp A and Amp B) each with

its own Neutrik Speakon™ connector (wired 1+/1-). The minimum speaker load per power amp A or B is 4 ohms.

Do not ground either the “+” or the “-“ outputs.

The SHUTTLE MAX12.0 dual power amp design offers a variety of available output power choices:

One 8 ohm load (either Amp A or Amp B driven)-----------------375 watts.

One 4 ohm load (either Amp A or Amp B driven)-----------------600 watts.

Two 8 ohm loads (Amp A and Amp B driven) ---------------------750 watts.

One 4 ohm load (Amp A) one 8 ohm load (Amp B)-------------- 975 watts.

Two 4 ohm loads (Amp A and Amp B driven)---------------------1200 watts.

FOOTSWITCHES – A DIN connector is provided for connecting the

included 5-button footswitch. This footswitch controls CHANNEL

switching and mixing along with all the GLOBAL SIGNAL SHAPE

circuits. Additional a ¼” footswitch jack is also provided for switch-

ing the MUTE function separately. Any single button footswitch will

operate this function.