Custom Voice Coils

Custom voice coils have been the core of our business at Precision Econowind since we began producing electric coils over 40 years ago. Round, rectangular, D-shaped, flat wire or custom shaped coils can be produced using precision layering practices. Single layer, multilayer, wet wound, dry wound, bifilar, multi-filar, dual, and quad coil configurations are available. Custom manufacturing solutions can be designed for a range of sizes and coil configurations. Copper, aluminum or CCA wire from #16 AWG to #48 AWG can be used to create voice coils with inner diameters ranging from 0.232”-10.0”. Custom inner diameters can be fabricated with custom tooling if required. Tolerances as tight as ±0.001” can be held on inner diameter dimensions.

Coils are 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. Precision layering techniques and flat winding capabilities allow us to produce coils with the highest possible turn density, providing superior performance and sound characteristics. Winding with flat wire, since we do the flattening in-house, allows us to custom fit a customers’ electrical specifications (DCR, turns) into their physical specifications (ID, OD, winding width) for a much more efficient use of space. Electrical testing including resistance, inductance, and turns count testing can be performed to customer specifications. Standard lead time on voice coils is 3 weeks with additional time for new tooling if applicable. We accept blanket orders and can stock items for customers as part of our commitment to provide the highest quality service available. For more information about our custom voice coil winding capability, see the table below or contact us directly.


General Capabilities
Accommodate Customers’ Custom Designs
Contract Production Small Parts
Precision Layered
Coil Shape
Other Custom Shapes
Coil Winding Process
Free Standing Wound on thin film material (Polyimide, Aluminum, Fiberglass)
Single Layer
Wet Wound Flat Wire (Edge Wound or Flat Wound)
Bifilar Windings
Multifilar Windings
Dual Coils
Quad Coils
Wire Material
Copper Clad Aluminum (CCA)
Wire Shape
Insulation Material
Low Temp (155°C)
High Temp (220°C)
Max Adhesive Temperature Rating
> 220°C
Wire Size (AWG)
#16 to #48 AWG
Voice Coil Winding Inner Diameter (ID) Range
0.232” – 10.0”
Other sizes available with custom tooling
Winding Inner Diameter (ID )Tolerance (+/-)
±0.001” to ±0.003”
Added Value Processes for Coil Finishing
Stripping and Tinning leads
Tinsel Attachment
Coil Winding Equipment
Manual Coil Winding Machines
CNC Coil Winding Machines
Soldering Irons/Posts Soldering Equipment
Automated Stripping Automated Tinning
Testing Equipment
Ohm Meters
Inductance Meters
Turns Counting Equipment
Testing Capabilities
Turns Count
Secondary Services
Blanket Orders
Carrying Stock for Customers
Production Volume
Small Run
Large Run
Typical Lead Time
3 Weeks Typical Additional Time Required for Tooling


Industry Focus
Consumer Products
Industrial Components
Intended Applications
Loudspeakers Voice Coil Motors
Space Constraint Applications
Industry Standards
ISO 9001:2015
ISO 14001
ISO 13485:2003
File Formats
Custom Sketches
Verbal Descriptions