User manual GALLIEN-KRUEGER FUSION 550

[. . . ] Fusion 550 Owner's Manual Fusion 550 Bass Amplifier Congratulations Your purchase of a new Gallien-Krueger amplifier is surely the result of much careful consideration on your part. For our part, we at Gallien-Krueger are pleased that you chose us, and are determined that you will be a satisfied customer. In choosing GK, you now own an amplifier with many unique features which will allow you to create your own distinct sound. To get the most out of your new amplifier please take a few minutes to read through this manual. [. . . ] 3) Channel Select Switch: Allows you to store two different settings via the motorized knobs. Switch to Channel 1 and adjust your settings then switch to Channel 2 and adjust the settings for your second channel. 4) Gain: Sets the preamp volume level before the shaping filters and EQ section. 5) Frequency Select Switch: Sets the center frequency for the Contour control to either 500Hz or 800Hz. 6) Contour: Reshapes the voice of the amplifier by cutting mid frequencies at either 500Hz or 800Hz depending on the position of the Frequency Select Switch. 7) Bright: 8) Deep: Boosts higher frequencies. 9) Treble: Active shelving type control which boosts and cuts the high frequencies. 10) High Mid: Active bandpass type control which boosts and cuts at about 1kHz. . 11) Low Mid: Active bandpass type control which boosts and cuts at about 250Hz. 12) Bass: Active shelving type control which boosts and cuts the low frequencies. 13) Horn Bi-Amp: Sets the ratio between the horn output and the master output. 14) Master: Master volume control. 15) Power & LED: Power on/off switch and LED. The LED ring is blue when the amplifier is on and flashes when the amplifier is muted via the Mute switch. If there is an electrical fault (shorted output, over heat) the protection circuitry will be engaged muting the amplifier output and the LED ring will turn red. 16) Mute: Mutes the master and DI output of the amplifier. This feature is automatically engaged when you connect to a GK HBS compatible enclosure, giving you independent control of the tweeter and woofer signals. Now you can push the woofers to the max while the tweeter remains clean, crisp, and free of clipping distortion. A smooth tight tone is easily dialed in by adjusting the Horn and Woofer Master controls on the amplifier's front panel. BI-AMP MODE FULL RANGE MODE Horn Bi-Amp Mode: This mode requires a GK Horn Bi-Amp compatible bass cabinet. Use a properly wired four-conductor Speakon cable to connect to your cabinet. Set the switch on the back of your GK HBS compatible enclosure to Bi-Amp. In this mode, the cabinet's internal crossover is bypassed. Use the Woofer/Main knob to control the output signal to the woofer, and the Horn knob to control the output signal to the horn. [. . . ] If an unsafe condition is detected, the output signal is immediately muted and the power light changes from blue to red. The amplifier will remain muted until the fault is removed. If the protection circuit activates while playing, turn the amplifier off and check that you have not exceeded the maximum recommended impedance load described in this manual. Direct Out: The Fusion 550 uses a transformer balanced DI (Direct Inject) output for connecting to PA and recording consoles. This output is calibrated for 1. 0V (0 dBV) and can be adjusted via the Level control to match the input sensitivity of the mixing console. [. . . ]