Rockville: Single 1-Ohm DVC Subwoofer Wiring

Introduction

This guide explains the two possible wiring configurations for a single dual voice coil (DVC) 1-ohm subwoofer: series wiring and parallel wiring. Both methods are simple once you understand the process. By the end, you’ll know how to safely wire your subwoofer and match it with the right amplifier.

Requirements:

• Single 1-ohm DVC (Dual Voice Coil) subwoofer
• Amplifier (rated for the desired impedance)
• Speaker wire (and jumper wires if needed)
• Multimeter (to confirm impedance)

Step 1: Check Resting Impedance

1. Use a multimeter to test each voice coil.
2. A DVC 1-ohm sub should read close to 1.0–1.1 ohms on each coil.

Step 2: Wiring

Option A → Series Wiring (Final Impedance: 2 Ohms)

Series wiring is useful if your amplifier is not stable at very low impedances (below 1 ohm).

1. Connect a jumper wire from the negative terminal of one coil to the positive terminal of the other coil.
2. Take your enclosure’s positive speaker wire and connect it to the remaining open positive terminal.
3. Take your enclosure’s negative speaker wire and connect it to the remaining open negative terminal.
4. Verify with your multimeter: impedance should measure around 2 ohms.

Amplifier compatibility:

• Use an amplifier rated for the subwoofer’s power at 2 ohms.
• Or use a 1-ohm stable amplifier running at 2 ohms for cooler operation and improved efficiency.

Option B → Parallel Wiring (Final Impedance: 0.5 Ohms)

⚠️ Parallel wiring lowers impedance below 1 ohm and requires an amplifier stable at 0.5 ohms.

1. Connect a jumper wire between the two positive terminals.
2. Connect the enclosure’s positive speaker wire to one of the positive terminals.
3. Connect a jumper wire between the two negative terminals.
4. Connect the enclosure’s negative speaker wire to one of the negative terminals.
5. Verify with your multimeter: impedance should measure around 0.5 ohms.

Amplifier compatibility:
Please note: This setup is not recommended for Rockville Amplifiers.

• Only use this setup with an amplifier specifically designed to run at 0.5 ohms.
• Not all amps are stable at such low impedance—check your amp’s specifications carefully.

Troubleshooting & FAQs

Q: My impedance reading is slightly off (e.g., 1.1 ohm instead of 1.0). Is this normal?
Yes, small variations are normal and expected due to resistance in wiring and manufacturing tolerances.

Q: Which wiring method should I choose?

• Series wiring (2 ohms): Best for amps not stable below 1 ohm. Runs cooler and more efficient.
• Parallel wiring (0.5 ohms): Only if your amplifier is designed for ultra-low impedance operation.

Q: What happens if I wire to an amp that can’t handle 0.5 ohms?
The amplifier may overheat, shut down, or become permanently damaged. Always match wiring to amp capability.

Conclusion

With a DVC 1-ohm subwoofer, you have two main wiring choices: series (2 ohms) for safer, cooler operation, or parallel (0.5 ohms) if your amplifier is stable at very low impedance. Always double-check with a multimeter before connecting to your amp.