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Visaton K 28 WPC BL 8 Ohm, 1.1 Inch, Waterproof Miniature Speaker

K 28 WPC BL · 8 Ω · part 2806 — Product photo

Product photo · Enlarge image

K 28 WPC BL · 8 Ω · part 2806 — Product photoProduct photo K 28 WPC BL · 8 Ω · part 2806 — Rear view and connectionsRear view and connections K 28 WPC BL · 8 Ω · part 2806 — Dimension drawingDimension drawing K 28 WPC BL · 8 Ω · part 2806 — Response and impedanceResponse and impedance

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

K 28 WPC BL · 8 Ω · part 2806 — Product photo

Product photo

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Part number: 2806

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

Nominal size
2.8 cm / 1.1 inch
Impedance
8 Ω
Rated power
1 W
Protection
IP65 — front side in a sealed enclosure
Sensitivity
76 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.

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Description

The K 28 WPC BL is a 2.8 cm miniature speaker with a plastic diaphragm (Mylar) and mounting ears, 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 76 dB (1 W/1 m).

Typical applications

  • Monitoring speaker for electronic devices
  • Voice and signal output in small devices
Full specifications
K 28 WPC BL · 8 Ω
Rated power1 W
Maximum power2 W
Nominal impedance8 Ω
Frequency response (−10 dB)300–20000 Hz
Mean sound pressure level76 dB (1 W/1 m)
Resonance frequency fs700 Hz
Voice coil diameter13.5 mm
Height of winding2 mm
Net weight7 g
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 WPC BL · 8 Ω · part 2806 — Dimension drawing

Dimension drawing · Open original image

Installation and cabinet guidance

No cut-out diameter is published for this driver: the round frame is 28 mm in diameter and carries two diagonally opposed mounting ears, 37.6 mm overall, with 3 mm holes on 32 mm centres; the unit is 5.5 mm deep overall, including the 0.7 mm flange, with a 16 mm magnet. Size the opening from the unit itself, and mark the holes from the unit rather than assuming the spacing. 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).

The K 28 WPC (parts 2809 and 2810) has the same technical data without the mounting ears. Choose this version where the ears give a convenient screw fixing, and the plain frame where the driver is bonded or clamped in place.

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