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Visaton K 28 WP 8 Ohm, 1.1 Inch, Waterproof Miniature Speaker

K 28 WP · 8 Ω · part 2909 — Product photo

Product photo · Enlarge image

K 28 WP · 8 Ω · part 2909 — Product photoProduct photo K 28 WP · 8 Ω · part 2909 — Rear view and connectionsRear view and connections K 28 WP · 8 Ω · part 2909 — Dimension drawingDimension drawing K 28 WP · 8 Ω · part 2909 — Response and impedanceResponse and impedance

Product photographs and manufacturer drawings. Images are not to scale.

K 28 WP · 8 Ω · part 2909 — Product photo

Product photo

Open original image
Part number: 2909

A 2.8 cm miniature speaker with a Mylar diaphragm for voice and signal output in small devices.

Nominal size
2.8 cm / 1.1 inch
Impedance
8 Ω
Rated power
1 W
Cut-out
24 mm
Sensitivity
75 dB (1 W/1 m)
Resonance
700 Hz
ex VAT
£4.74 inc VAT
Maximum quantity available reached.

Stock and dispatch
Selected products are held in UK stock; other lines are sourced to order. Dispatch timing depends on the product and quantity.

Delivery information. Need it for a specific date? Ask us.

Quantity discounts

Description

The K 28 WP is a 2.8 cm miniature speaker with a plastic diaphragm (Mylar), giving a balanced response and good voice reproduction in very small devices. It is functional at cold to EN 60068-2-1/EN 50155, and its IP65 protection applies to the front when it is built into a sealed enclosure. This 8 Ω version handles 1 W and gives 75 dB (1 W/1 m).

Typical applications

  • Monitoring speaker for electronic devices
  • Voice and signal output in small devices
Full specifications
K 28 WP · 8 Ω
Rated power1 W
Maximum power2 W
Nominal impedance8 Ω
Frequency response (−10 dB)300–20000 Hz
Mean sound pressure level75 dB (1 W/1 m)
Excursion limit±0.5 mm
Resonance frequency fs700 Hz
Voice coil diameter13.5 mm
Height of winding2 mm
Cut-out24 mm
Net weight0.007 kg
TerminalsSolder joints
Protective systemIP65 — front side in a sealed enclosure
Temperature range−40 to 70 °C
DiaphragmMylar (plastic)
Low-temperature testFunctional at cold to EN 60068-2-1 / EN 50155
Dimensions and drawings
K 28 WP · 8 Ω · part 2909 — Dimension drawing

Dimension drawing · Open original image

Installation and cabinet guidance

Allow for a 24 mm panel opening. The round frame is 28 mm in diameter and the unit is only 5.5 mm deep overall, including the 0.7 mm flange, with a 16 mm magnet. The frame has no fixing holes, so it is normally bonded or clamped in place; check the method against your enclosure design and keep the clamping even all round. Leave clearance behind the panel for the solder joints and their leads.

The IP65 protection applies to the front of the driver only, and only when it is built into a sealed enclosure; the rear is open to the enclosure. Mount it on a flat panel with a continuous seal around the frame and protect the rear from water and dust; bonding the driver in and fitting a front cover or grille may be needed to complete the protection. Check that the panel face is clean and true where the seal beds down, and seal the cable entry as well, since the rear protection comes from the enclosure rather than from the driver. Operating temperature range −40 to 70 °C.

Solder to the solder joints on the rear, observe polarity and keep the leads clear of the moving parts. Use a suitable iron and keep the soldering time short so that heat is not conducted into the driver. Support the leads so that they cannot pull on the joints. Use an amplifier suitable for the 8 Ω load and keep the drive within the 1 W rating (2 W maximum).

This is the 8 Ω version; the 50 Ω version is part 2910. Check the impedance against the amplifier and the installation before ordering.

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