Voice coils consist of a few components: the bobbin (former), the wire, the collar, adhesives, and the lead-out wire.
For the bobbin (former) we offer 3 types that are the most commonly used: Kapton, aluminum and stainless steel. For the wire we offer 3 types of wire, copper, aluminum, and CCA. Of the 3 wires copper wire is the most commonly used for speakers, although aluminum and copper-clad aluminum wire (CCAW) are also used. Copper is more conductive than aluminum and substitution of aluminum for copper requires a larger diameter wire for the same conductivity. Copper offers superior strength and is much easier to solder to than aluminum. Aluminum voice coils requires special fluxes or mechanical (crimp) connection techniques. Aluminum offers lower mass with greater conductivity per unit weight than copper. Aluminum wire is vulnerable to work with—hardening when used at elevated operating temperatures, resulting in brittleness and wire failure. Furthermore, aluminum expands over one-third more than copper when subjected to the same temperatures. CCAW offers much of the benefits of both materials, but is still not as robust as copper wire.
All these types of materials have to be taken in consideration when deciding what type of subwoofer you want to build weather it’s sound quality sub or spl monster. What ever size it may be 100 watt 6.5″-8000 watt 32″ we got what you need to make it happen.
Most of our voice coils are made in the USA wound using our proprietary high-temperature adhesive capable of withstanding operating temperatures upwards of 500°F. This attribute has led customers to turn to us when competitors’ coils have come apart due to adhesive failure.