Two constructions
Internal reverse winding or a two-layer design with an internal former — selected for the specific application.
ESR / B2B MANUFACTURING
Voice coils
For professional loudspeakers. Built from a sample or technical specification — from one prototype to repeatable batches of up to 1,000 units.
01 / CAPABILITY
From sample to a repeatable batch.
Final parameters, price, lead time and available capacity are confirmed after engineering review of the specific design.
01
New specification
Design review based on supplied dimensions and application requirements.
02
From sample
Reverse engineering when no drawing exists but a physical coil or driver is available.
03
Prototype
A sample for verification and approval before batch production.
04
Repeat order
A reproducible batch linked to an approved ESR specification revision.
02 / IN-HOUSE MANUFACTURING
Designed around the actual driver.
We work from a physical sample or technical data: select the construction, conductor and former materials, produce a prototype, then lock the approved revision for repeat batches.
Materials
Copper, aluminium or copper-clad aluminium conductor; glass-fibre or Kevlar former after engineering review.
From one piece
A single prototype is possible. Price and lead time depend on dimensions, materials, construction and batch volume.
03 / APPLICATIONS
Built for professional B2B use.
This manufacturing direction is separate from ordinary loudspeaker repair and is intended for production against an agreed specification.
Service centresReplacement coils for repeatable repairs and recone work.
Loudspeaker buildersPrototypes and batches for custom acoustic projects.
Rental / service companiesPlanned parts supply for professional loudspeaker fleets.
Repair workshopsManufacturing from a sample or customer technical data.
04 / PROCESS
A controlled production process.
A repeat order references an approved specification and revision so the next batch is not produced from an informal description.
01Inquiry
02Specification review
03Prototype if required
04Approval
05Production & QC
06Delivery
ESR does not publish universal tolerances, power, temperature, MOQ or lead time without reviewing the specific construction. These parameters are confirmed in the quotation and approved specification.