GB1: How To Set Up An Instrument

Introduction

The Rockville GB1 Mixer offers multiple input options, making it easy to connect guitars, keyboards, synthesizers, and microphones. This guide will walk you through the steps to set up instruments or a synth with the GB1 mixer, including using the EQ controls for sound adjustments.

Connecting a Guitar to the GB1 Mixer

1. Get a 1/4-inch Instrument Cable
   • Plug one end of the cable into the output of your guitar.
   • Plug the other end into a 1/4-inch line input on the mixer (e.g., Channel 1).
2. Adjust the Gain and Volume
   • Raise the gain fader for Channel 1.
   • Raise the main left and right faders to hear audio from the speakers.
   • Adjust your guitar’s volume knob to a comfortable level.
3. Play Your Guitar
   • You should now hear your guitar coming through the speakers.

Using the EQ Controls

Each channel on the GB1 mixer includes a two-band EQ:

🔹 High (Treble) Knob – Controls the high frequencies (clarity and presence).

• Lower it for a softer tone.
• Raise it for more brightness and detail.

🔹 Low (Bass) Knob – Controls the low frequencies (depth and warmth).

• Lower it for a thinner sound.
• Raise it for a fuller bass response.

Connecting a Keyboard or Synthesizer to the GB1

1. Use Dual 1/4-inch Cables (For Stereo Output)
   • Take two 1/4-inch instrument cables.
   • Plug one end of each cable into the left and right outputs on your keyboard.
   • Plug the other ends into the left and right inputs of Channels 4 & 5 on the mixer.
2. Adjust the Gain and Volume
   • Raise the gain fader for Channels 4 & 5.
   • Raise the main left and right faders.
   • Increase the keyboard’s volume for proper output.
3. Play the Keyboard
   • You should hear stereo sound from both speakers.

Alternative Setup: Using a Mono Output

If your keyboard has a mono output (left output labeled “Mono”), you can:

• Use a single 1/4-inch cable instead of two.
• Plug one end into the keyboard’s mono output.
• Plug the other end into Channel 1 on the mixer.
• Raise the gain and main faders to hear the sound.

🔹 This method saves mixer channels for other instruments!

Conclusion

With multiple inputs and adjustable EQ, the Rockville GB1 Mixer makes it easy to connect guitars, keyboards, and other instruments. Whether using stereo or mono setups, you can fine-tune your sound for performances, recordings, or live events.