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Find compact Mylar 57mm 40-ohm speakers for intercom applications. Specs, wiring tips, accessories and local stock/quote options at Communica South Africa.
Mylar cone emphasises mid-range clarity for speech in intercom systems.
Confirm 40 Ohm matches your amplifier or add matching components.
Check Samrand and branch stock, request VAT quotes for education or bulk orders.
The Mylar 57mm 40-ohm speaker is a small, lightweight electromechanical transducer commonly used in intercom handsets, door-station units, paging interfaces and compact public-address housings. With a polyester (Mylar) cone construction and a 57mm (~2.25") frame diameter, this speaker balances size, cost and intelligibility for voice-focused applications. The primary keyword "mylar 57mm 40-ohm speaker for intercom applications" appears throughout to help you quickly confirm compatibility and selection.
Mylar cones are lightweight and produce clear mid-range reproduction, which emphasises speech intelligibility - crucial for intercom and voice-announce systems. The 40-ohm impedance is often selected to match legacy handset amplifiers and telephone-interface transformers where higher impedance drivers reduce load on the drive circuit. For more on matching drivers to amplifiers, see understanding speaker impedance for intercom use.
Specification Callout: check the speaker's resonant frequency (Fs), sensitivity (dB @ 1W/1m) and continuous vs. peak power ratings on the datasheet to confirm it meets your intercom's output and clarity needs.
When integrating a mylar 57mm 40-ohm speaker into an intercom, consider the amplifier or driver stage: the amplifier must be rated to drive a 40 Ohm load and provide sufficient voltage swing to reach desired sound pressure levels. If your intercom uses a transformer-coupled handset output, confirm the transformer's primary impedance and tap selections. Wiring is usually simple: two wires to the speaker terminals with polarity marking where present. For selection guidance, consult how to choose a 40-ohm speaker for intercoms.
Amplifier out (+) ----[wire]---- (+) speaker Amplifier out (-) ----[wire]---- (-) speaker If using a transformer: Amplifier out -> transformer primary transformer secondary -> speaker (observe polarity)
| Feature | Common 57mm Mylar, 40 Ohm | Typical 50mm/8 Ohm alternative |
|---|---|---|
| Impedance | 40 Ohm | 8 Ohm |
| Sensitivity | ~80-88 dB (model-dependent) | ~82-90 dB |
| Best for | Voice/intercoms with higher source impedance | Low-impedance audio outputs, general PA |
Choose a speaker variant by matching impedance, power handling and mounting type to your intercom enclosure. If your amplifier provides limited voltage but higher current, an 8 Ohm speaker may perform differently from a 40 Ohm part; in retrofit cases, keep the same impedance to avoid overloading the driving circuitry.
Communica stocks a broad range of electromechanical components and can supply mylar speakers and mounting accessories. Check stock availability for Samrand (head office/warehouse) and branch collection in Pretoria CBD or Cape Town. For education or bulk procurement, request a VAT invoice and quote - lead times for specialised assemblies or branded speaker models can vary from in-stock to a few weeks; always verify the product page or request a lead-time update when ordering.
If you need help selecting a specific 57mm mylar 40-ohm speaker or an accessory bundle for an intercom project, compare datasheets for sensitivity, Fs and power handling, then check local stock and collection options. Use the product category pages for Speakers / Transducers and Accessories to filter by impedance and size, or request a quote for educational and bulk purchases.
Communica supplies semiconductors and electronic components to industries such as automotive, electrical, automation, mining, and education.
Disclaimer: This content is for educational purposes only. Product availability, pricing, and specifications are subject to change. Always verify current details on the retailer's website before making a purchase. We may earn affiliate commissions from qualifying purchases.
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