Loudspeaker diaphragms · Speaker cones · Voice coils

Precision acoustic components, built by hand and held to spec.

For three decades, Quality Trading Co. has manufactured moulded cotton loudspeaker diaphragms, speaker cones and voice-coil assemblies for loudspeaker makers across India — produced to your drawings and consistent batch after batch.

Est. 1970 Delhi, India Diaphragms + voice-coil assembly

Capabilities

What we make

Loudspeaker diaphragms, speaker cones and voice-coil assemblies — the components at the heart of a driver, with the flexibility to build to your specification.

Part 01 / Diaphragm

Moulded cotton loudspeaker diaphragms

Resin-treated cotton cloth, formed on heated die presses to a consistent cone profile, weight and compliance — the repeatable foundation of a predictable driver.

Part 02 / Assembly

Voice-coil assemblies

Copper voice coils mounted concentric to the diaphragm with controlled bonding, delivered as a secure, aligned assembly ready to drop into your loudspeaker build.

Part 03 / Custom

Made to specification

Parts produced to your drawings, materials and tolerances — from sample runs through to steady volume — with quality standards agreed up front.

Quality

Built to be audited.

Our customers run quality and material audits, and our process is set up to pass them — because the same discipline that satisfies an auditor is what keeps your line running.

Material traceability from incoming cotton and copper through to the finished part.

Documented moulding parameters for a repeatable cure, weight and compliance.

Incoming and in-process inspection at the points that decide the outcome.

Consistency held batch to batch — not just piece to piece.

Facility

Investing in the next three decades.

We're expanding into a new dedicated manufacturing facility to add capacity, tighten process control and bring more of the build under one roof — so quality is designed in, not inspected in.

Contact

Request a quotation or arrange a visit.

Tell us the part, the specification and the volume — we'll come back with samples, timelines and pricing. Facility visits are welcome.

Email us

Address
E-113,
Mangolpuri Industrial Area Phase II, Delhi 110034, India

Phone
[+91 XXXXX XXXXX]

Email
qualitytradingco@gmail.com

Hours
Mon–Sat, [9:00–18:00]