RPA12 | RPA14 | RPA16: How To Set Up & Use

Introduction

The Rockville RPA12 2-Channel Power Amplifier is an excellent solution for powering passive speakers or mixers, offering clear sound for live performances, DJ events, and recording setups. The RPA12 is also 2U rack-mountable, which makes it perfect for installing into a rack unit. The setup process is straightforward, and this guide will walk you through all the necessary steps.

Requirements

• Rockville RPA12 2-Channel Power Amplifier (also applicable for RPA14 and RPA16)
• Passive speakers or mixers
• XLR cables
• Speakon cables (for connecting speakers)
• Rack mount or rack bag (optional)

Step-by-Step Instructions

1. Rack-Mounting the RPA12

• If you're using a rack mount, start by attaching the rack ears to the sides of the amplifier. Align the two holes on the sides of the RPA12 with the available holes on the rack mount.
• Secure the rack ears using the four screws provided.
• If you're using a rack bag, simply slide the RPA12 into the bag and secure it.

2. Understanding the Front Panel

• Volume Knobs: These control the output volume for your speakers connected through the amplifier.
• Indicators:
  • On light: Indicates when the amplifier is powered on.
  • Signal light: Shows that the amplifier is receiving a signal.
  • Clip light: Lights up when the input signal is too loud (clipping).
  • Protect light: Illuminates if there's an issue such as a short circuit, low impedance, or internal malfunction.

3. Understanding the Back Panel

• Inputs:
  • Combo input jacks: These accept either XLR or quarter-inch connections.
  • XLR Link Outputs: Use these to connect multiple amplifiers.
• Mode Switch:
  • Stereo mode: Channel A powers the left speaker and Channel B powers the right speaker.
  • Parallel mode: Both channels A and B output the same signal, useful for mono applications.
  • Bridge mode: Combines the power of both channels A and B, ideal for powering high-power speakers or subwoofers.
• Crossover Switch: Selects low-end frequencies (160 Hz or 80 Hz) for subwoofer output.
• Outputs:
  • Speakon outputs: For connecting to passive speakers.
  • Five-way binding posts: Allows for speaker connection with speaker wires (positive/negative).

4. Connecting Your Passive Mixer and Speakers

• Step 1: Connecting the Mixer to the Amplifier:
  • Use two XLR cables to connect the XLR main outputs on your mixer to the XLR inputs on the RPA12 (Channel A and B).
• Step 2: Connecting the Speakers:
  • Use Speakon cables to connect the Speakon outputs (Channel A and B) on the RPA12 to the Speakon inputs on your passive speakers.

5. Turning On and Testing the System

• Turn on your mixer first.
• Next, turn on the amplifier. Make sure the volume knobs are adjusted appropriately.
• Raise the main left and right faders on your mixer to send the signal to the amplifier.
• Raise the gain knob and volume knob on the mixer’s microphone input.
• If everything is connected correctly, you should hear sound coming from both speakers when you speak into a microphone.

6. Optional: Using Positive and Negative Terminals

• If your speakers can be connected via positive and negative speaker wires, use the five-way binding posts to connect your speakers.

Troubleshooting & FAQs

1. No Sound or Low Output

• Make sure the amplifier is powered on, and the signal light is illuminated.
• Check all connections, especially the XLR cables and Speakon cables.
• Ensure that the volume knobs are turned up, and the correct input mode is selected on the amplifier.

2. Clipping Light Illuminates

• If the clip light is flashing, reduce the input signal from your mixer or audio source to avoid distortion.

3. Protect Light Illuminates

• If the protect light is on, there may be an issue with the speaker impedance, or a short circuit could be present. Check the connections and ensure the speakers are correctly rated for the amplifier.

Conclusion

The RPA12 Power Amplifier is a powerful tool for any performance or recording setup. By following these simple steps, you can quickly set up and get optimal sound from your passive speakers and mixers.