RPM47: Inputs, Outputs & Controls

Introduction

This article provides a comprehensive overview of all inputs, outputs, and control features available on the Rockville RPM47 mixer. The RPM47 is versatile and user-friendly, ideal for live performances, rehearsals, recording setups, and karaoke. No technical expertise is needed; just follow along with the clear instructions.

Inputs and Outputs Overview

Rear Panel Connections:

Speaker Outputs

• Two ¼-inch speaker outputs are available on the back panel to connect your speakers.
• If your speakers have Speakon inputs, use Speakon-to-¼-inch cables for connection.

RCA Inputs (Aux In)

• Use the RCA inputs to connect external audio devices such as:
  • Record players
  • MP3 players
  • CD players
• To adjust playback volume from these inputs, use the Aux Input Level knob on the front panel.

RCA Record Outputs

• Sends the mixer’s complete audio output to external devices for recording or expanding setups. Suitable for:
  • Audio interfaces
  • Additional mixers
  • Powered speakers or subwoofers

USB Interface (PC Connectivity)

• Connect your mixer directly to a computer or laptop via a USB-B to USB-A cable (or USB-C with an adapter/dock).
• Record your audio directly to your computer using software such as Audacity, GarageBand, or Logic.

External Effects Loop

• Connect external effects devices (reverb, delay, pedals) using two ¼-inch cables:
  • Effects Send → input of external effect unit.
  • Effects Return → output from external effect unit.

Front Panel Controls and Inputs

Channels 1-5: Mic/Instrument Inputs

• Each channel provides:
  • XLR Mic input for microphones.
  • ¼-inch Line input for instruments like guitar, bass, or keyboards.

Setting Up a Microphone or Instrument

1. Connect your device to the desired input.
2. Turn up the channel’s Level knob and the overall Master Volume knob.
3. Optionally, activate Phantom Power (+48V) for condenser microphones.
4. Use the PAD button (reduces signal by -20dB) if the incoming audio signal is too strong.

Channel Controls: EQ & Effects

Two-Band EQ (High and Low knobs)

• High knob: Controls high-end frequencies.
  • Turn clockwise to boost brightness.
  • Turn counterclockwise to reduce brightness.
• Low knob: Controls low-end frequencies.
  • Turn clockwise to enhance bass.
  • Turn counterclockwise to reduce bass.

Built-In DSP Effects Section

• Program knob: Select from 24 built-in effects (e.g., reverb, delay, chorus).
• Parameter knob: Adjust the amount (dry/wet) of the selected effect.
• DSP to Main knob: Controls the level of the effect sent to the main output.

Examples of Built-In Effects:

• Hall and Room Reverbs
• Plate Reverb
• Delays and Echos
• Chorus, Tremolo, Phaser, Wah, Pitch Shifter, Radio Effect, etc.

External Effects Loop Control

• After connecting an external effect:
  • Raise the Effects Loop Return knob.
  • Use the channel’s Effects knob to determine how much effect is applied to each channel.

Seven-Band Graphic Equalizer (Master EQ)

• Adjust the overall mixer output EQ.
• Helpful to manage frequencies across all connected audio sources.

Bluetooth and USB Playback Control

• Play audio via Bluetooth or USB thumb drive:
  • Use the Mode button to toggle between Bluetooth and USB.
  • Controls provided include:
    • Play/Pause
    • Stop
    • Skip forward/backward
• MP3 Volume knob: Adjust playback volume.

Connecting Bluetooth Devices:

1. Press the Mode button until Bluetooth mode is active.
2. On your smartphone/tablet, search and pair with "Rockville".
3. Adjust the playback volume from both the mixer and your device.

Quick Tips for Common Scenarios

• Stereo Instruments (Keyboards/Synths):
  • Use two channels, one for left output and one for right output.
• Reducing Signal Distortion:
  • Activate the PAD button (-20dB) to reduce input levels on channels.
• Recording Directly to a Computer:
  • Use USB connectivity to interface directly with recording software on a PC or Mac.

Troubleshooting & FAQs

Q: Why is no audio coming out of my speakers?

• A: Ensure channel Level knobs, Master Volume knob, and MP3 Volume knob (if using Bluetooth/USB) are adequately raised.

Q: My voice or instrument sounds distorted.

• A: Reduce input levels using the channel's Level knob or press the PAD button.

Q: Bluetooth isn’t pairing.

• A: Confirm Bluetooth mode is activated on the mixer. Reboot your mobile device’s Bluetooth setting and pair again.

Conclusion

You now fully understand all inputs, outputs, and controls available on your Rockville RPM47 mixer. With this knowledge, you're ready for professional-quality sound setups and performances.