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Visaton DT 94 4 Ohm, 0.8 Inch, Polycarbonate Dome Tweeter

DT 94 · 4 Ω · part 9003 — Product photo (shared by the 4 Ω and 8 Ω versions)

Product photo (shared by the 4 Ω and 8 Ω versions) · Enlarge image

DT 94 · 4 Ω · part 9003 — Product photo (shared by the 4 Ω and 8 Ω versions) Product photo (shared by the 4 Ω and 8 Ω versions) DT 94 · 4 Ω · part 9003 — Dimension drawing Dimension drawing DT 94 · 4 Ω · part 9003 — Response and impedance Response and impedance DT 94 · 4 Ω · part 9003 — Directivity pattern Directivity pattern

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

DT 94 · 4 Ω · part 9003 — Product photo (shared by the 4 Ω and 8 Ω versions)

Product photo (shared by the 4 Ω and 8 Ω versions)

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Part number: 9003

A 20 mm polycarbonate dome tweeter for the range above 3000 Hz in two- and three-way hi-fi speakers.

Nominal size
20 mm / 0.8 inch
Impedance
4 Ω
Rated power
70 W (12 dB/oct. high-pass from 4000 Hz)
Cut-out
64 mm
Sensitivity
90 dB (1 W/1 m)
Resonance
1900 Hz
ex VAT
£32.34 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 DT 94 pairs a polycarbonate dome with a round faceplate, and its ferrofluid-cooled voice coil allows high power handling with an even response and wide dispersion. This 4 Ω version has a d.c. resistance of 3.1 Ω, is rated at 70 W with a 12 dB/oct. high-pass from 4000 Hz and gives 90 dB (1 W/1 m) with a 1900 Hz resonance.

Typical applications

  • Tweeter for hi-fi speakers
  • Speaker kit builds
Full specifications
DT 94 · 4 Ω
Rated power70 W (12 dB/oct. high-pass from 4000 Hz) / 50 W (12 dB/oct. high-pass from 2000 Hz)
Maximum power100 W (12 dB/oct. high-pass from 4000 Hz) / 80 W (12 dB/oct. high-pass from 2000 Hz)
Nominal impedance4 Ω
Frequency response (−10 dB)1200–22000 Hz
Mean sound pressure level90 dB (1 W/1 m)
Opening angle (-6 dB)84°/8000 Hz
Resonance frequency fs1900 Hz
Magnetic induction1.2 T
Magnetic flux185 µWb
Height of front pole-plate2.5 mm
Voice coil diameter20 mm
Height of winding2 mm
Cut-out64 mm
Net weight0.24 kg
D.C. resistance Rdc3.1 Ω
Mechanical Q factor Qms3
Electrical Q factor Qes0.6
Total Q factor Qts0.5
Effective piston area Sd3 cm²
Dynamically moved mass Mms0.2 g
Inductance of the voice coil L0.09 mH
Terminals4.8 x 0.8 mm (+)/2.8 x 0.8 mm (-)
Dimensions and drawings
DT 94 · 4 Ω · part 9003 — Dimension drawing

Dimension drawing · Open original image

Installation and cabinet guidance

Allow a 64 mm panel opening. The round faceplate is 94 mm in diameter, with 4.3 mm fixing holes countersunk to 7.5 mm on an 81 mm circle; mark them from the unit itself rather than assuming the spacing. Behind the panel allow about 19 mm for the 60 mm rear housing, plus room for the terminals and the wiring.

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 (70 W), or from 2000 Hz at a reduced 50 W, 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. A dome this small depends on that filter to survive, so keep the slope steep and do not cross it over lower than the rating allows. Use an amplifier suitable for the 4 Ω load.

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