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Visaton KE 25 SC 8 Ohm, 1 Inch, High-End Ceramic Dome Tweeter

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KE 25 SC · 8 Ω · part 1191 — Product photo

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KE 25 SC · 8 Ω · part 1191 — Product photo Product photo KE 25 SC · 8 Ω · part 1191 — Rear view and connections Rear view and connections KE 25 SC · 8 Ω · part 1191 — Dimension drawing Dimension drawing KE 25 SC · 8 Ω · part 1191 — Response and impedance Response and impedance KE 25 SC · 8 Ω · part 1191 — Directivity pattern Directivity pattern KE 25 SC · 8 Ω · part 1191 — Cumulative spectral decay Cumulative spectral decay

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

KE 25 SC · 8 Ω · part 1191 — Product photo

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Part number: 1191

A magnetically shielded 25 mm ceramic dome tweeter for the treble range in high-end hi-fi speakers.

Nominal size
25 mm / 1 inch
Impedance
8 Ω
Rated power
80 W (12 dB/oct. high-pass from 4000 Hz)
Cut-out
82 mm
Sensitivity
89 dB (1 W/1 m)
Resonance
Compensated (impedance linearised by the integrated LRC network)
£150.95 Business price, ex VAT £181.14 inc VAT at 20%
Maximum quantity available reached.

Description

The KE 25 SC has a ceramic dome, a perforated pole piece, a damped cavity and a ventilated voice coil former, which together give a very low resonance, while an integrated LRC network linearises the impedance and compensates that resonance. This 8 Ω version is rated at 80 W with a 12 dB/oct. high-pass from 4000 Hz and gives 89 dB (1 W/1 m).

Typical applications

  • High-end hi-fi systems
  • Tweeter for multi-way hi-fi speakers
Full specifications
KE 25 SC · 8 Ω
Rated power80 W (12 dB/oct. high-pass from 4000 Hz)
Maximum power140 W (12 dB/oct. high-pass from 4000 Hz)
Nominal impedance8 Ω
Frequency response (−10 dB)800–25000 Hz
Mean sound pressure level89 dB (1 W/1 m)
Opening angle (-6 dB)124°/8000 Hz
Resonance frequency fsCompensated (impedance linearised by the integrated LRC network)
Magnetic induction1.5 T
Magnetic flux470 µWb
Voice coil diameter25 mm
Cut-out82 mm
Net weight0.98 kg
D.C. resistance Rdc5.9 Ω
Terminals4.8 x 0.8 mm (+)/2.8 x 0.8 mm (-)
Dimensions and drawings
KE 25 SC · 8 Ω · part 1191 — Dimension drawing

Dimension drawing · Open original image

Installation and cabinet guidance

Allow an 82 mm panel opening. The faceplate is 104.5 mm in diameter, with 4.2 mm fixing holes countersunk to 7.5 mm on a 94 mm circle; mark them from the unit itself rather than assuming the spacing. Behind the panel allow about 55 mm for the 80 mm rear housing, plus room for the terminals and the wiring, and confirm that depth before committing to a slim cabinet.

Mount it on a rigid baffle with a continuous seal between the faceplate and the panel, tighten the fixings evenly and only enough to seal so the faceplate is not distorted, and keep the dome clear of any grille. Connect to the 4.8 x 0.8 mm (+)/2.8 x 0.8 mm (-) blade terminals with matching push-on connectors and observe polarity; the two blade widths identify it. The power ratings apply only with a 12 dB/oct. high-pass filter from 4000 Hz, so feed it through the system crossover or a high-pass filter that gives at least that protection; never connect it directly to a full-range signal. The impedance is linearised by the integrated LRC network, which simplifies the crossover design, and the magnet system is shielded. At 0.98 kg it is heavy for a dome tweeter, so make sure the baffle and the fixings can carry it. Use an amplifier suitable for the 8 Ω load.

Visaton lists the WG 148 R and WG 220x150 waveguides as accessories for this tweeter.

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