DigiTech RP155 Guitar Multi-Effects Processor User Manual

1. Introduction

The DigiTech RP155 is a versatile guitar multi-effects processor designed to provide a wide array of amplifier models, cabinet simulations, stompboxes, and effects. This unit integrates a built-in 20-second looper, 60 high-quality drum patterns, and USB audio streaming capabilities, allowing for direct recording to a computer. This manual will guide you through the features and functions of your RP155, ensuring optimal performance and longevity.

2. Safety Instructions

Please read and understand these safety instructions before operating the DigiTech RP155. Retain this manual for future reference.

• Power Supply: Use only the specified power adapter. Incorrect voltage can damage the unit and void the warranty.
• Water and Moisture: Do not expose the unit to rain, moisture, or any liquids. If liquid enters the unit, disconnect power immediately and contact customer support.
• Heat Sources: Keep the unit away from heat sources such as radiators, heat registers, stoves, or other apparatus that produce heat.
• Ventilation: Ensure proper ventilation. Do not block any ventilation openings.
• Servicing: Do not attempt to service the unit yourself. Refer all servicing to qualified service personnel.
• Cleaning: Clean only with a dry cloth. Do not use liquid cleaners or aerosol cleaners.

3. Package Contents

Verify that your package contains the following items:

• DigiTech RP155 Guitar Multi-Effects Processor
• Power Adapter
• User Manual (this document)

Note: A USB cable is not typically included and may need to be purchased separately for computer connectivity.

4. Product Overview

The DigiTech RP155 features a robust design with intuitive controls for guitarists.

4.1 Front Panel Controls

Image 1: Front view of the DigiTech RP155, showing the display, control knobs, and footswitches.

The front panel provides access to the main display, control knobs, and footswitches for navigating presets and engaging effects.

• Display: Shows current preset number, effect parameters, and tuner information.
• Control Knobs: Used for adjusting parameters within effects and amp models.
• Footswitches: Allow for stepping through presets, engaging the looper, and activating the tuner.
• Edit Button: Accesses the parameter editing mode.
• Looper Button: Activates the 20-second looper function.
• Bypass Button: Engages or disengages the effects processing.

4.2 Rear Panel Connections

Image 2: Rear view of the DigiTech RP155, displaying input, output, USB, and power connections.

The rear panel houses all necessary input and output jacks for connecting your guitar, amplifier, headphones, and computer.

• INPUT: 1/4-inch mono jack for connecting your guitar.
• AMP/MIXER Switch: Optimizes output for either a guitar amplifier or a mixing console/headphones.
• LEFT (Mono) OUTPUT: 1/4-inch jack for connecting to an amplifier or mixer. Use this for mono output.
• RIGHT OUTPUT: 1/4-inch jack for stereo output when connecting to two amplifiers or a stereo mixer.
• HEADPHONE OUTPUT: 1/8-inch stereo jack for private practice.
• CONTROL IN: Jack for an optional external expression pedal (not included).
• USB: Type B USB port for connecting to a computer for recording and using the X-Edit software.
• 9VAC 1.3A: Power input jack for the included AC adapter.

5. Getting Started: Setup

Follow these steps to set up your DigiTech RP155 for the first time.

5.1 Power Connection

1. Connect the included 9VAC power adapter to the 9VAC 1.3A jack on the rear panel of the RP155.
2. Plug the power adapter into a suitable AC outlet. The unit will power on automatically as there is no dedicated on/off switch.

5.2 Audio Connections

1. Connect your guitar to the INPUT jack on the rear panel using a standard 1/4-inch instrument cable.
2. To an Amplifier: Connect the LEFT (Mono) OUTPUT jack to the input of your guitar amplifier. Set the AMP/MIXER switch to the 'AMP' position.
3. To a Mixer/PA System: Connect the LEFT (Mono) OUTPUT (and RIGHT OUTPUT for stereo) to the inputs of your mixer or PA system. Set the AMP/MIXER switch to the 'MIXER' position.
4. Headphones: For silent practice, connect stereo headphones to the HEADPHONE OUTPUT jack. The AMP/MIXER switch should be in the 'MIXER' position for optimal headphone sound.

5.3 USB Connection (for Computer)

1. Connect a USB cable (Type A to Type B, not included) from the USB port on the RP155 to an available USB port on your computer.
2. Install the necessary drivers and the DigiTech X-Edit software from the official DigiTech website. This software allows for advanced preset editing and firmware updates.

6. Operating the RP155

This section details the primary functions and features of your RP155.

6.1 Basic Navigation and Presets

• Selecting Presets: Use the left and right footswitches to scroll through the 100 available presets (50 factory, 50 user). The display will show the preset number.
• Adjusting Master Volume: Use the dedicated MASTER LEVEL knob to control the overall output volume of the unit.
• Bypass: Press the BYPASS footswitch to toggle between the active effect chain and a dry, unprocessed signal.

6.2 Editing Effects and Amps

The RP155 allows for detailed editing of its 83 amps, cabinets, stompboxes, and effects.

1. Press the EDIT button to enter editing mode.
2. Use the control knobs to navigate through effect modules and adjust parameters. The display will show the current parameter and its value.
3. After making changes, press and hold the STORE button (often combined with another control) to save your edited preset to a user location.

For a more intuitive editing experience, connect the RP155 to your computer and use the DigiTech X-Edit software. This graphical interface simplifies parameter adjustments and preset management.

6.3 Using the Looper

The RP155 includes a 20-second looper for creating and layering guitar phrases.

1. Press the LOOPER button to activate the looper function.
2. The footswitches will now control record, play, and overdub functions. Refer to the on-screen indicators for current looper status.
3. To exit looper mode, press the LOOPER button again.

6.4 Using the Drum Machine

The RP155 features 60 high-quality drum patterns for practice and songwriting.

1. Locate the DRUMS section on the front panel.
2. Use the associated knob to select a drum pattern and adjust its tempo and volume.
3. The drum machine can be used independently or alongside your guitar effects.

6.5 Chromatic Tuner

A built-in chromatic tuner allows for accurate guitar tuning.

• To activate the tuner, typically press and hold both footswitches simultaneously.
• Play a single note on your guitar. The display will indicate the note and whether it is sharp or flat.
• Adjust your guitar's tuning until the display shows the note as in tune.
• To exit the tuner, press either footswitch.

6.6 USB Audio Streaming

The USB connection allows the RP155 to function as an audio interface for your computer.

• Once connected via USB and drivers are installed, the RP155 will appear as an audio input/output device in your computer's sound settings.
• You can record your guitar directly into a Digital Audio Workstation (DAW) software with the RP155's processed sound.
• The RP155 can also play back audio from your computer through its outputs, allowing you to play along with tracks.

7. Maintenance

Proper care will ensure the longevity and reliable performance of your RP155.

• Cleaning: Use a soft, dry cloth to clean the exterior of the unit. Avoid abrasive cleaners or solvents.
• Storage: When not in use, store the RP155 in a dry, cool environment, away from direct sunlight and extreme temperatures.
• Firmware Updates: Periodically check the official DigiTech website for firmware updates. Updates can be installed via the USB connection using the X-Edit software.

8. Troubleshooting

If you encounter issues with your RP155, refer to the following common problems and solutions.

• No Sound:
  • Ensure the power adapter is securely connected and the unit is powered on.
  • Check all audio cables for secure connections.
  • Verify the MASTER LEVEL knob is turned up.
  • Confirm the AMP/MIXER switch is set correctly for your output device.
  • If using headphones, ensure they are fully plugged in and the volume is adjusted.
• Distorted or Unwanted Sound:
  • Check your guitar's volume and tone controls.
  • Adjust the input level on the RP155 (if available, or reduce guitar output).
  • Review the current preset's effect parameters, especially gain and distortion settings.
  • Ensure the AMP/MIXER switch is correctly set. Using 'MIXER' into a guitar amp can cause unwanted coloration.
• USB Connection Issues:
  • Ensure the USB cable is securely connected at both ends.
  • Verify that the correct USB drivers are installed on your computer. These can be found on the DigiTech support website.
  • Try a different USB port on your computer or a different USB cable.
  • Restart your computer and the RP155.
• Footswitches Not Responding:
  • Ensure the unit is powered on.
  • If in a specific mode (e.g., Looper or Tuner), the footswitches may have different functions. Exit these modes to return to preset navigation.

If problems persist, contact DigiTech customer support for further assistance.

9. Specifications

10. Warranty Information

DigiTech products are designed for reliability and performance. For detailed warranty information, including terms, conditions, and registration, please refer to the warranty card included with your product or visit the official DigiTech website. Keep your proof of purchase for warranty claims.

11. Customer Support

For additional assistance, technical support, or to download the latest drivers and X-Edit software, please visit the official DigiTech support website:

www.digitech.com/support

You may also find helpful resources, FAQs, and community forums on the DigiTech website.