Your Subwoofer—Wired for Sound
Wiring configurations for any application
You have more than one option for connecting your subwoofer to your amplifier. But first, you must take into consideration the need to match your amplifier, subwoofer and their impedance in order to obtain the highest performance from these components. The wiring diagrams, mentioned in the following paragraphs, are just some of the best options available to you.
To avoid your high-powered amplifier from overheating, as well as damage to both your amp and subs, the ohms you drive your amp with must not be lower than what it is designed to handle. Some low-impedance wiring diagrams are included.
Voice Coils—Single or Dual
A single subwoofer voice coil is equipped with 2 terminal posts. A dual subwoofer voice coil is equipped with 4 terminal posts. The impedances for these voice coils are 2-ohm, 4-ohm and 8-ohm.
You can find a subwoofer’s impedance marked on the back of the magnet. Impedance is defined as the amount of electrical resistance the subwoofer holds against an amplifier’s output. Things may get complicated when you wire dual voice coils and more than one subwoofer together. This may not be a very practical option, as the total impedance is not always easy to calculate.
It’s always a good idea to consult with your manual first, before wiring your amplifier and subwoofer. Keep in mind that amplifiers have a higher output capacity to low impedance subwoofers than high impedance subwoofers. However, not all amps can safely drive low impedance subwoofers.
Bridging an Amplifier
When you combine two of the amplifier’s channels into one channel, you are bridging the amplifier. The down side of this is that bridged channels are not capable of driving impedance loads as low as unbridged amps.
Speaker wires, as indicated in the Subwoofer Wiring Diagrams are used for wiring subwoofers. Recommended sizes are 12 to 14-gauge.