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Tiny 28mm metal speaker cone with wires, 4.5mm high, lightweight silver finish

Adafruit

Adafruit Mini Metal Speaker 8 ohm 0.5W 28mm

SKU CH-K88T-18M13

A compact 28 mm metal speaker rated at 8 Ω with a maximum input power of 0.5 W, suited for small audio projects

  • Product typeEngineering Development Tools
  • Tiny 28 mm cone adds audio to compact projects
  • Light 6 g metal body keeps weight low in portable builds
  • 8 Ω impedance matches common amplifier boards directly
  • Rated for 0.25 W continuous with 0.5 W peak handling
  • Frequency range from 600 Hz to 10 KHz covers voice and alerts

Compact 28 mm metal speaker for micro-projects

This 28 mm diameter metal speaker is built for small audio projects that require an 8 Ω load and 0.5 W maximum input. Its 6 g metal body keeps weight to a minimum while fitting into tight enclosures. The driver works well with a Wave shield or class D amplifier board. It is suited for hobbyists adding simple sound to portable builds.

Low heat and silent operation at rated power

At the rated 0.25 W input the speaker produces negligible heat and no audible mechanical noise. The metal frame acts as a modest heatsink across the -20 °C to 55 °C operating range. Current draw stays small, so battery-powered designs see minimal impact on run-time.

Sustained 0.5 W peaks need careful gain staging

The 0.5 W maximum input can be reached only briefly; continuous operation at that level risks overheating the voice coil. Class D breakouts capable of 1.7 W must be gain-limited and started at low volume to avoid damage. Frequency response holds between roughly 600 Hz and 10 kHz during extended use.

How it compares

Measured against everything we stock in Engineering Workstations & Dev Kits, at today’s prices. Recalculated every night.

Price $6.99
Cheaper than about 80% of the 170 comparable items (median $11.49).

Specifications

Product
Product typeEngineering Development Tools

Questions about this item

How do I connect the pre-attached wires to an amplifier board without overdriving the 0.5 W limit?

Solder the two wires to the amplifier output terminals, observing polarity if marked. Start with the volume low and increase slowly; the class D amp breakout can deliver 1.7 W, which exceeds the 0.5 W maximum and will blow the cone if driven hard.

What long-term care does the metal cone need in a portable project?

The speaker has no user-serviceable parts. Keep the cone free of dust and moisture, avoid pressing on the diaphragm, and stay within the -20 °C to 55 °C temperature range. If distortion appears after extended use, the voice coil may have overheated and the unit should be replaced.

At what point does the 0.5 W thermal limit appear during continuous playback?

The rated input power is 0.25 W and the absolute maximum is 0.5 W. Sustained operation at or above 0.5 W will overheat the voice coil, causing permanent damage. Run at lower average levels and monitor for distortion, which signals the thermal limit has been reached.

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