Darkglass AO900 Alpha Omega 900 Bass Amplifier Head and IFS Footswitch User Manual

1. Introduction

This manual provides detailed instructions for the Darkglass AO900 Alpha Omega 900 bass amplifier head and the Darkglass Intelligent Footswitch (IFS). The AO900 is a high-performance 900-watt bass amplifier designed to deliver powerful and versatile tones. It integrates Darkglass's Alpha and Omega drive engines, a studio-grade VCA compressor, and a comprehensive graphic equalizer. The IFS Footswitch provides remote control over key amplifier functions.

2. Key Features

• 900-watt power output for robust performance.
• Integrated Alpha and Omega distortion engines for diverse tonal shaping.
• Studio-grade VCA compressor for dynamic control.
• 6-band graphic equalizer for precise tone sculpting.
• MIDI programmability for advanced control.
• Impulse response cabinet simulation with three storable virtual cabinets.
• Auxiliary input and headphone output for silent practice.
• Includes Darkglass Intelligent Footswitch for remote control.

3. Setup

Follow these steps to set up your Darkglass AO900 amplifier and IFS Footswitch:

1. Power Connection: Connect the amplifier to a suitable power outlet using the provided power cable. Ensure the power switch is in the OFF position before connecting.
2. Instrument Connection: Plug your bass guitar into the INPUT jack on the front panel. Select the appropriate PASSIVE/ACTIVE switch setting based on your instrument's output.
3. Speaker Connection: Connect your speaker cabinet to the speaker output on the rear panel. Ensure the speaker impedance matches the amplifier's output requirements.
4. Footswitch Connection: Connect the Darkglass Intelligent Footswitch to the designated footswitch input on the amplifier using a standard instrument cable.
5. Initial Power On: Turn on the amplifier's power switch. The power indicator will illuminate.

4. Controls and Functions

Image 1: Front panel of the Darkglass AO900 Alpha Omega 900 bass amplifier head (left) and the Darkglass Intelligent Footswitch (right).

4.1. Amplifier Head (AO900)

• INPUT: 1/4-inch jack for instrument connection.
• PASSIVE/ACTIVE Switch: Selects input impedance for passive or active instruments.
• COMP: Controls the amount of compression applied to the signal.
• DRIVE: Adjusts the amount of distortion from the Alpha Omega engine.
• LEVEL: Sets the output level of the distorted signal.
• MOD: Blends between the Alpha (tight, percussive) and Omega (brutal, raw) distortion circuits.
• BLEND: Mixes the clean input signal with the distorted signal from the Alpha Omega engine.
• GAIN: Controls the overall gain of the Alpha Omega engine.
• GROWL: A switch that provides a bass boost for a thicker, more powerful tone.
• BITE: A switch that provides a treble boost for added presence and clarity.
• Graphic Equalizer: Four sliders visible on the front panel (250 Hz, 500 Hz, 1.5 kHz, 5 kHz) allow for precise frequency adjustments. The amplifier features a 6-band graphic equalizer in total.
• MUTE: Mutes the amplifier's output.
• MASTER: Controls the overall output volume of the amplifier.

4.2. Intelligent Footswitch (IFS)

• Footswitch Button: Toggles the distortion engine on/off or mutes the amplifier, depending on the programmed function.
• POWER ON LED: Indicates the amplifier is powered on.
• DISTORTION LED: Indicates when the Alpha Omega distortion engine is active.
• MUTE LED: Indicates when the amplifier's output is muted.

5. Operating Instructions

To operate your Darkglass AO900 and IFS Footswitch:

1. After completing the setup, ensure all volume controls (including MASTER) are set to a low level before playing.
2. Gradually increase the MASTER volume to your desired listening level.
3. Use the DRIVE, LEVEL, MOD, BLEND, and GAIN controls to dial in your desired distortion tone. Experiment with the GROWL and BITE switches for additional tonal variations.
4. Adjust the graphic equalizer sliders (250 Hz, 500 Hz, 1.5 kHz, 5 kHz) to fine-tune your frequency response.
5. Engage the compressor using the COMP knob to control dynamics.
6. Use the IFS Footswitch to remotely activate/deactivate the distortion engine or mute the amplifier as needed during performance. The corresponding LEDs on the footswitch will indicate the active status.
7. For silent practice, connect headphones to the headphone output and use the auxiliary input for backing tracks.

6. Maintenance

Proper maintenance ensures the longevity and optimal performance of your amplifier:

• Cleaning: Use a soft, dry cloth to clean the amplifier's exterior. Avoid abrasive cleaners or solvents.
• Storage: Store the amplifier in a cool, dry place away from direct sunlight and extreme temperatures.
• Ventilation: Ensure proper ventilation around the amplifier to prevent overheating. Do not block ventilation openings.
• Transportation: When transporting, use appropriate protective cases to prevent physical damage.

7. Troubleshooting

If you encounter issues, consider the following common troubleshooting steps:

• No Power: Check the power cable connection and the power outlet. Ensure the power switch is ON.
• No Sound: Verify all cable connections (instrument, speaker, footswitch). Check the MASTER volume and ensure the MUTE function is not active on the amplifier or footswitch. Confirm your instrument is working correctly.
• Distorted Sound (unintended): Check input gain levels and ensure they are not excessively high. Adjust DRIVE and LEVEL controls.
• Footswitch Not Responding: Ensure the footswitch cable is securely connected.
• Overheating: Ensure the amplifier has adequate ventilation. If the amplifier shuts down due to overheating, allow it to cool down before restarting.

If problems persist, consult a qualified technician.

8. Specifications

• Model: AO900
• Output Wattage: 900 Watts
• Signal Format: Analog
• Number of EQ Bands: 6 (Graphic Equalizer)
• Item Weight: 1 pound (amplifier head)
• Product Dimensions: 3 x 3 x 3 inches (amplifier head)
• ASIN: B07R4X6GH2
• UPC: 768563721939

9. Warranty and Support

Darkglass Electronics products are designed for reliability and performance. For specific warranty information, please refer to the warranty card included with your product or visit the official Darkglass Electronics website. For technical support or service inquiries, please contact Darkglass customer service through their official channels.