SPG-Series Speakers: How To Set Up & Use

Introduction

The Rockville SPG Passive Speakers are versatile and powerful speakers designed for live performances, band rehearsals, DJ events, houses of worship, karaoke, and more. They come in four sizes:

• 8-inch (SPG84, SPG88)
• 10-inch (SPGN104, SPGN108) 
• 12-inch (SPGN124, SPGN128)
• 15-inch (SPGN154, SPGN158)

Each size is available in 4-ohm and 8-ohm versions. This guide will walk you through setting up and using these passive speakers, whether for individual use, stage monitoring, or larger setups with multiple speakers.

Step-by-Step Setup Guide

1. Positioning the Speakers

The SPG speakers are designed to be used in multiple positions:

• Standing upright for standard PA speaker use.
• Sideways on the floor as a stage monitor for musicians.
• Mounted on a speaker stand for elevated sound projection.

Mounting on a Speaker Stand

1. Loosen the locking knob on the bottom of the speaker.
2. Lift the speaker using the built-in handles.
3. Align the stand’s pole with the 35mm socket on the bottom of the speaker.
4. Slide the speaker down onto the stand.
5. Tighten the locking knob to secure the speaker.

2. Connecting the Speakers to a Powered Mixer or Amplifier

Since the SPG series are passive speakers, they require a powered mixer or amplifier to function.

What You’ll Need:

• Powered Mixer or Amplifier
• Two SpeakON Cables (one per speaker)

Connecting Two Speakers to a Mixer

1. Take a SpeakON cable and connect one end to the left channel output of the mixer/amplifier.
2. Plug the other end into the SpeakON input of the first speaker.
3. Take another SpeakON cable and connect one end to the right channel output of the mixer/amplifier.
4. Plug the other end into the SpeakON input of the second speaker.

Turning on the System

1. Power on the mixer/amplifier.
2. Raise the main left and right faders on the mixer.
3. Raise the volume level of the channel playing audio (e.g., Bluetooth, microphone, instrument).
4. Play audio to test the speaker output.

3. Daisy Chaining Additional Speakers

The SPG series speakers include a SpeakON output, allowing you to daisy chain multiple speakers.

Connecting Four Speakers in Parallel

1. Connect two main speakers to the mixer/amplifier as described earlier.
2. Take a SpeakON cable and connect one end to the SpeakON output of the first speaker.
3. Plug the other end into the SpeakON input of the additional speaker.
4. Repeat for the second speaker on the opposite side.

Understanding Speaker Impedance in Parallel Connections

• Two 8-ohm speakers per channel = Final impedance of 4 ohms.
• Two 4-ohm speakers per channel = Final impedance of 2 ohms (requires a 2-ohm stable amplifier/mixer).

Most powered mixers and amplifiers support 4-ohm speaker loads, making 8-ohm speakers ideal for daisy chaining.

4. Adjusting Sound and Testing the System

1. Ensure the main left and right faders are up.
2. Adjust individual channel faders for microphones, instruments, or music playback.
3. If using Bluetooth audio, make sure the Bluetooth volume channel is raised.
4. Test the sound and make any EQ adjustments if necessary.

5. Ideal Speaker Configurations

1. Basic Setup (Two Speakers) – Left and right main PA speakers powered by a mixer/amplifier.
2. Expanded Setup (Four Speakers) – Two main speakers for the audience and two stage monitors for performers.
3. Large Event Setup – Multiple speaker pairs daisy-chained for enhanced sound coverage.

Conclusion

The Rockville SPG Passive Speakers offer flexibility and high-quality sound, making them ideal for a wide range of live sound applications. Whether using them as main speakers or stage monitors, setting them up is quick and easy.

By following this guide, you can:

• Mount and position the speakers correctly.
• Connect the speakers to a powered mixer or amplifier.
• Expand the setup by daisy chaining multiple speakers.
• Optimize impedance levels to prevent system damage.