CL14 Series: How To Measure, Install & Connect

Introduction

The Rockville CL-14 speaker wire is designed for in-wall and in-ceiling installations in homes, offices, and commercial spaces. Available in 100 ft, 250 ft, and 500 ft lengths, this wire is CL2-rated, meaning it meets National Electrical Code (NEC) fire resistance standards. This ensures the wire does not carry a flame and will not burn from electrical surges up to 150 watts.

This guide will walk you through the step-by-step installation process, from measuring and cutting to running the wire and connecting it to your speakers and receiver.

Step 1: Choosing the Right Wire Type

The Rockville CL-14 wire comes in two configurations:

• Two-Conductor Wire – Includes one positive (red) and one negative (black) wire, suitable for most single-speaker setups.
• Four-Conductor Wire – Includes two positive (red and green) and two negative (black and white) wires, ideal for:
  • Speakers placed close together (e.g., front left and front right home theater speakers).
  • Bi-amped speakers (separate inputs for highs and lows).
  • Alarm system installations requiring multiple connections.

Step 2: Measuring and Determining Wire Length

Before running the wire, measure the distance from your receiver or amplifier to your speakers.

General Guidelines for Measuring Speaker Wire:

• Use a stud finder to check for obstacles inside walls.
• Plan your route, avoiding pipes, electrical wiring, and structural beams.
• Add 20–40% extra wire to account for slack, bends, and unexpected obstructions.
• Example: If the distance from the receiver to the speaker is 10 feet, use at least 12–14 feet of wire.

Tip: Extra slack can be coiled into a service loop for easier maintenance and adjustments.

Step 3: Drilling Holes for Wire Installation

1. Choose drilling locations:
   • Match hole heights with existing electrical outlets or switches for a cleaner installation.
   • For in-wall runs, ensure holes are large enough to pass the wire through easily.
   • Use a single-gang pass-through plate to cover entry/exit points for a professional look.
2. For in-ceiling installations:
   • Check for obstacles like beams or HVAC ducts before drilling.
   • If installing in a drop ceiling, remove the tiles for easy access.
   • For sheetrock ceilings, consider hiring a contractor or professional for assistance.

Step 4: Running the Speaker Wire

In-Wall Installations:

• Use a fish tape or wire-pulling tool to guide the wire through the wall.
• Secure the wire with wire clips or cable ties to prevent sagging.

In-Ceiling Installations:

• Run the wire through open spaces in the ceiling cavity.
• Avoid placing wires near electrical cables to reduce interference.

Tip: In drop ceilings, installation is easier since you have open visibility and removable tiles.

Step 5: Stripping the Wire for Connections

Once your speaker wire is in place, strip the insulation to expose the inner conductors.

Tools You Can Use:

• Wire stripper (recommended)
• X-Acto knife or box cutter (use gloves for safety)
• Scissors

How to Strip the Wire:

1. Remove the Outer PVC Layer:
   • Use a wire stripper’s larger slot to cut around the white PVC insulation.
   • Alternatively, use scissors to carefully strip the outer layer.
2. Strip the Inner Wires:
   • Use the 14-gauge slot on a wire stripper.
   • Strip about ½ inch of insulation from each conductor.

Step 6: Connecting the Speaker Wire to Your Equipment

Two-Conductor Wire (Standard Setup)

• Red wire → Positive (+) terminal on the receiver and speaker.
• Black wire → Negative (-) terminal on the receiver and speaker.

Four-Conductor Wire (Bi-Amping or Dual Speakers)

• Red wire → Positive (+) terminal of one speaker.
• Green wire → Positive (+) terminal of the second speaker.
• Black wire → Negative (-) terminal of one speaker.
• White wire → Negative (-) terminal of the second speaker.

Using Banana Connectors (Optional)

• If your receiver or speakers support banana connectors, insert the bare wire into the connector for a secure and easy-to-plug connection.

Final Checks & Testing

• Ensure all wire connections are tight and polarity is correct (red to +, black to -).
• Power on your receiver and play test audio through your speakers.
• If the sound is weak or distorted, double-check wire connections and ensure positive and negative wires are not crossed.

Troubleshooting & FAQs

Q: Can I run CL-14 speaker wire alongside electrical wires?

It’s best to avoid running speaker wire parallel to electrical cables, as it can cause interference. If necessary, keep them at least 12 inches apart.

Q: What happens if I reverse the red and black wires?

Reversing polarity will cause the speaker to play out of phase, reducing sound clarity and bass response. Always match red to positive (+) and black to negative (-).

Q: Can I use the CL-14 wire for outdoor speakers?

Yes, but only if the wire is installed inside a weatherproof conduit. CL-14 is designed for indoor use.

Q: How do I secure excess wire?

Coil the extra wire into a service loop and secure it with cable ties to keep your setup neat.

Conclusion

Installing Rockville CL-14 In-Wall and In-Ceiling Speaker Wire is a simple process that ensures safe and reliable speaker connections in your home or office. By following these steps, you’ll have a clean, professional installation with high-quality sound performance.