VOX AC15C2 2x12 inch 15-watt Guitar Tube Combo Amplifier

Introduction

Thank you for purchasing the VOX AC15C2 2x12 inch 15-watt Guitar Tube Combo Amplifier. This manual provides essential information for the safe and optimal use of your amplifier. Please read it thoroughly before operation and retain it for future reference.

Front view of the VOX AC15C2 Guitar Amplifier, showcasing its classic design and dual Celestion Greenback speakers.

Key Features

• 15-watt tube amplifier with classic VOX Top Boost tone circuit for rich, articulate sound.
• Equipped with EL84 power tubes and 12AX7 preamp tubes for authentic tube tone.
• Features two 12" Celestion Greenback speakers for powerful, clear sound projection.
• Two channels: Normal and Top Boost, each with its own Volume control for versatile tone shaping.
• Interactive Treble and Bass tone controls on the Top Boost channel for dynamic sound customization.
• Tone Cut control in the power stage for additional tone-shaping capabilities.
• Reliable and durable build quality for long-lasting performance.
• Classic tremolo effect with adjustable controls for speed and depth.
• Simple yet effective controls: Gain, Bass, Treble, Reverb, and Master Volume.
• Ideal for genres like rock, blues, and classic rock with its iconic VOX tone.

Setup

Power Connection

Connect the amplifier to a suitable power outlet using the provided power cord. Ensure the power switch is in the 'OFF' position before connecting.

Initial Power-Up and Standby

To power on the amplifier, first flip the 'POWER' switch to 'ON'. The indicator light will illuminate. Allow approximately one minute for the tubes to warm up to operating temperature. After the warm-up period, flip the 'STANDBY' switch to 'ON' to engage the amplifier's functional mode. This sequence helps prolong tube life.

Close-up of the amplifier's top control panel, showing the Power and Standby switches, along with Master Volume and Tone Cut controls.

Speaker Connections

The AC15C2 features internal Celestion Greenback speakers. For external speaker configurations, use the 'EXTERNAL SP' or 'EXTENSION SP' jacks on the rear panel. The 'EXTERNAL SP' jack disconnects the internal speakers, while the 'EXTENSION SP' jack runs in parallel with the internal speakers. Always ensure the impedance selector switch (8 Ohms or 16 Ohms) matches the connected speaker cabinet(s) to prevent damage.

Rear view of the VOX AC15C2 Amplifier, highlighting the speaker output jacks and impedance selector switch.

Operating the Amplifier

Control Panel Overview

The amplifier features a comprehensive control panel for shaping your tone:

• Master Volume: Controls the overall output volume of the amplifier.
• Tone Cut: This control is counter-intuitive. Turning it up cuts higher frequencies, emphasizing mids and lows. Turning it down eliminates lower frequencies, emphasizing higher frequencies.
• Tremolo (Depth & Speed): Adjusts the intensity (Depth) and rate (Speed) of the built-in tremolo effect.
• Reverb Level: Controls the amount of the built-in spring reverb effect. Use sparingly as it has a long decay tail.
• Top Boost Channel (Bass, Treble, Volume): Provides interactive tone controls (Bass, Treble) and a dedicated Volume for the Top Boost channel. This Volume acts as a preamp gain, while the Master Volume acts as the overall output.
• Normal Channel (Volume): A single Volume control for the Normal channel. This also acts as a preamp gain, with the Master Volume controlling the overall output.

Detailed view of the amplifier's control panel, showing all knobs and switches for tone shaping.

Understanding the Tone Cut Control

The Tone Cut control operates in the power stage of the amplifier. Unlike typical tone controls that boost or cut specific frequencies, the Tone Cut knob reduces the high-end frequencies as it is increased. This allows for fine-tuning the overall brightness and presence of your sound.

Video demonstrating the functionality of the Tone Cut control on the Vox AC15 and AC30 amplifiers, explaining its unique operation.

Channel Operation

The AC15C2 offers two distinct channels: Normal and Top Boost. Each channel has its own input jack and volume control. Experiment with both channels to discover their unique tonal characteristics. The Top Boost channel provides additional EQ controls (Bass, Treble) for more precise sound sculpting.

Video providing sound demonstrations of all controls on the AC15 and AC30 amplifiers, including channel switching and effect adjustments.

Maintenance

To ensure the longevity and optimal performance of your VOX AC15C2 amplifier, follow these maintenance guidelines:

• Tube Care: Always allow the amplifier to warm up for at least one minute after turning on the power before engaging the standby switch. This helps to extend the life of the vacuum tubes.
• Cleaning: Use a soft, dry cloth to clean the exterior of the amplifier. Avoid abrasive cleaners or solvents.
• Storage: Store the amplifier in a dry, temperate environment away from direct sunlight or extreme temperatures.
• Transportation: Handle the amplifier with care. The tolex covering is durable but can be damaged by impacts.

Troubleshooting

If you encounter any issues with your amplifier, consider the following common troubleshooting steps:

• No Sound: Check all cable connections (guitar, power, speaker). Ensure both the power and standby switches are in the 'ON' position. Verify that the volume controls are not set to zero.
• Weak or Distorted Sound: Check for faulty tubes. Allow adequate warm-up time. Ensure speaker impedance matches the connected cabinet.
• Excessive Hum or Noise: Ensure all cables are properly shielded and connected. Try plugging the amplifier into a different power outlet.

For persistent issues, consult a qualified technician.

Specifications

What's in the Box

• VOX AC15C2 Guitar Tube Combo Amplifier
• Instruction Manual

Warranty and Support

The VOX AC15C2 amplifier comes with a 1-year warranty covering parts and labor. Please note that tubes and footswitches are covered for 90 days. For technical support or warranty claims, please refer to the contact information provided in your purchase documentation or visit the official VOX website.