Contour Enthusiasts Group Archives Forums Modifications Audio Ohms Questions

Don't leave one voice coil unconnected. The speaker is designed to use both. With only one connected, cone travel will be minimal which may result in not enough air movement to cool the voice coils = burn up.

For dual VC 4 ohm subs: Wire up one + to the other voice coil's - lead on each speaker. Take each remaining + lead (one per speaker) on each speaker to the + bridged lead on the amp. Take the remaining - leads (one per speaker) to the - bridged leads on your amp.

For dual VC 8 ohm subs: Wire the + leads together and the - leads together on speaker one. Repeat for speaker #2. Connect the left speaker + and - leads to the left output, the right speaker to the respective right outputs. This will be a 4 ohm stereo load which will leave much more dynamic headroom than an 8 ohm mono load. The Xplode series amps, IIRC (someone correct me if I'm wrong), have a regulated power supply which tend to run better around 4 ohm loads, not above (as in 8 ohms briged).

These are just my opinions from running the installation bay at a car audio shop about 5 years ago and running the IASCA circuit from '90-'93.