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Understanding the Controls, Inputs, and Outputs on Your Rockville PLX12

Ira - Zendesk Admin
Updated

Introduction

This guide explains the controls, DSP settings, inputs, and outputs available on your Rockville PLX12. Whether you are connecting microphones, mixers, instruments, or Bluetooth devices, this article will help you understand how each feature works.

The instructions are written in a simple, beginner-friendly format with easy step-by-step explanations.

What You’ll Need

  • Rockville PLX12 speaker 
  • Included power cable 
  • Bluetooth device, microphone, mixer, or instrument (optional) 
  • XLR, 1/4-inch, or AUX cables depending on your setup 

Powering On the Speaker

Step 1: Connect Power

  1. Plug the included power cable into the speaker. 
  2. Connect the cable to a power outlet. 

Step 2: Turn On the Speaker

  1. Locate the power switch on the rear panel. 
  2. Switch the speaker on. 

Understanding the DSP Menu

The PLX12 includes a built-in DSP (Digital Signal Processor) that allows you to customize audio settings.

Accessing the DSP Menu

  1. Press the DSP control knob. 
  2. Rotate the knob to navigate through menus. 
  3. Press the knob again to select options. 

Main DSP Menus

Available Menus

  • Setup 
  • Mode 
  • Lo-Cut 
  • EQ 
  • Position 
  • Exit 

Setup Menu

The Setup menu contains system and Bluetooth controls.

LED Settings

You can customize the display brightness and logo lighting.

Available Options

  • Turn the logo LED on or off 
  • Adjust display brightness 

To Adjust Brightness

  1. Open the LED menu. 
  2. Select Brightness. 
  3. Rotate the knob to increase or decrease brightness. 
  4. Press Enter to confirm. 

Bluetooth Setup

Turning Bluetooth On

  1. Open the Bluetooth menu. 
  2. Select Bluetooth On. 

Pairing a Bluetooth Device

  1. Open Bluetooth settings on your phone or device. 
  2. Search for “PLX12”. 
  3. Select the speaker to pair. 

Disconnecting a Bluetooth Device

  1. Open the Bluetooth menu. 
  2. Select “Control Pairing”. 
  3. The connected device will disconnect. 

TWS (True Wireless Stereo) Pairing

TWS allows two PLX12 speakers to connect wirelessly for Bluetooth playback.

To Pair Two Speakers

  1. Turn Bluetooth on for both speakers. 
  2. Open the Bluetooth menu. 
  3. Select “TWS Pairing”. 

The speakers will connect wirelessly for stereo playback.

Delay Settings

The Delay menu helps synchronize speakers, subwoofers, or mixers.

To Adjust Delay

  1. Open the Delay menu. 
  2. Select Delay Time. 
  3. Rotate the knob to adjust the timing. 
  4. Press Enter to save. 

You can also change the delay unit inside the menu.

Reset and Software Update

Reset the Speaker

  1. Open the Setup menu. 
  2. Select Reset. 

This restores factory settings.

Update Speaker Software

  1. Open the Setup menu. 
  2. Select Update. 

Mode Menu (Preset EQ Settings)

The Mode menu provides preset EQ curves for different applications.

Available Presets

  • Music 
  • Club 
  • Live 
  • Speech 
  • Flat 

To Select a Preset

  1. Open the Mode menu. 
  2. Choose the preset you want. 
  3. Press Enter. 

Lo-Cut Settings

The Lo-Cut feature reduces low frequencies.

Available Lo-Cut Options

  • 80Hz 
  • 100Hz 
  • 120Hz 
  • 150Hz 
  • Flat 

To Adjust Lo-Cut

  1. Open the Lo-Cut menu. 
  2. Select the desired frequency cutoff. 
  3. Press Enter. 

Custom EQ Controls

You can manually adjust the speaker sound using the EQ menu.

Adjustable Frequencies

  • Treble 
  • Mid 
  • Bass 

Adjusting Treble

  1. Open the EQ menu. 
  2. Select Treble. 
  3. Rotate the knob to increase or decrease the level. 

Adjusting Mid Frequencies

  1. Select Mid. 
  2. Rotate the knob to adjust the level. 

Adjusting Bass

  1. Select Bass. 
  2. Rotate the knob to adjust the level. 

Position Menu

The Position menu optimizes sound based on speaker placement.

Available Position Modes

  • PA 
  • Floor Monitor 
  • Wall Mount 

Recommended Usage

PA Mode

Use when the speaker is mounted upright for audience coverage.

Floor Monitor Mode

Use when the speaker is positioned on the floor facing performers.

Wall Mount Mode

Use when the speaker is permanently mounted on a wall.

Understanding the Inputs

The PLX12 includes two separate input channels.

Channel One

Channel One supports:

  • Bluetooth 
  • AUX 
  • Microphones 
  • Line-level devices 

Mic Mode

Use Mic mode when connecting:

  • Wired microphones 

To Enable Mic Mode

  1. Locate the Mic/Line switch. 
  2. Switch it to Mic. 

Line Mode

Use Line mode when connecting:

  • Mixers 
  • Instruments 
  • Audio processors 
  • Other line-level devices 

To Enable Line Mode

  1. Locate the Mic/Line switch. 
  2. Switch it to Line. 

Channel One Volume Control

The volume knob controls the level of anything connected to Channel One.

Channel Two

Channel Two also supports:

  • Mic mode 
  • Line mode 

It includes the same combo input connections as Channel One.

Combo Input Jacks

Both channels support:

  • XLR connectors 
  • 1/4-inch connectors 

This allows compatibility with a wide range of audio devices.

AUX Input

The speaker includes a 3.5mm AUX input for music playback devices.

To Use the AUX Input

  1. Connect your device using a 3.5mm AUX cable. 
  2. Use the Channel One volume knob to control playback volume. 

Understanding the XLR Output

The PLX12 includes a Pre-DSP Mix XLR output for connecting additional speakers or subwoofers.

Output Modes

CH2 Thru Mode

When set to CH2 Thru:

  • Only audio from Channel Two is sent to the XLR output. 

Best Uses

  • Mono speaker chains 
  • Stage speaker expansion 
  • Subwoofer routing 

Mix CH1+2 Mode

When set to Mix:

  • Audio from Channel One and Channel Two is combined and sent to the output. 

Best Uses

  • Stereo systems 
  • Full-range speaker expansion 
  • Combined audio playback 

Example Usage for CH2 Thru

If you have several speakers on one side of a stage, CH2 Thru allows the same mono signal to pass through all connected speakers.

Troubleshooting & FAQs

Bluetooth Device Will Not Connect

Solutions

  • Make sure Bluetooth is turned on 
  • Search for “PLX12” in your device settings 
  • Disconnect previously paired devices using Control Pairing 
  • Restart your Bluetooth device 

No Audio from Connected Devices

Check the Following

  • Speaker is powered on 
  • Volume knobs are raised 
  • Correct input mode is selected: 
    • Mic for microphones 
    • Line for mixers or instruments 
  • Cables are securely connected 

Sound Is Too Bass Heavy or Too Bright

Solution

Adjust:

  • DSP presets 
  • Bass, Mid, and Treble settings 
  • Lo-Cut filter 

Additional Speakers Are Not Receiving Audio

Solutions

  • Check XLR output connections 
  • Verify output mode settings 
  • Confirm connected speakers are powered on 

Conclusion

The Rockville PLX12 provides flexible audio controls, DSP customization, Bluetooth connectivity, and multiple input/output options for a wide range of live sound applications.

By understanding the DSP menus, EQ controls, input modes, and output routing, you can quickly optimize the speaker for performances, events, DJ setups, or general music playback.

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