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Visaton DSM 50 FFL 8 Ohm, 2 Inch, High-End Titanium Dome Midrange

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DSM 50 FFL · 8 Ω · part 1163 — Product photo

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DSM 50 FFL · 8 Ω · part 1163 — Product photo Product photo DSM 50 FFL · 8 Ω · part 1163 — Rear view and connections Rear view and connections DSM 50 FFL · 8 Ω · part 1163 — Dimension drawing Dimension drawing DSM 50 FFL · 8 Ω · part 1163 — Response and impedance Response and impedance DSM 50 FFL · 8 Ω · part 1163 — Directivity pattern Directivity pattern DSM 50 FFL · 8 Ω · part 1163 — Cumulative spectral decay Cumulative spectral decay

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

DSM 50 FFL · 8 Ω · part 1163 — Product photo

Product photo

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Part number: 1163

A 50 mm titanium dome midrange driver for the 800–5000 Hz band in high-end multi-way speakers.

Nominal size
50 mm / 2 inch
Impedance
8 Ω
Rated power
120 W (12 dB/oct. high-pass from 800 Hz)
Cut-out
106 mm
Sensitivity
90 dB (1 W/1 m)
Resonance
430 Hz
£109.95 Business price, ex VAT £131.94 inc VAT at 20%
Maximum quantity available reached.

Description

The DSM 50 FFL has a rigid, ultra-light titanium dome and a heavily damped surround, giving a linear response free of partial oscillations, while the ferrofluid-filled gap and compensating magnet provide high efficiency and power handling. This 8 Ω version is rated at 120 W with a 12 dB/oct. high-pass from 800 Hz, gives 90 dB (1 W/1 m) and resonates at 430 Hz.

Typical applications

  • Dome midrange in multi-way systems
  • Midrange in three-way hi-fi speakers
  • High-end hi-fi systems
Full specifications
DSM 50 FFL · 8 Ω
Rated power120 W (12 dB/oct. high-pass from 800 Hz)
Maximum power180 W (12 dB/oct. high-pass from 800 Hz)
Nominal impedance8 Ω
Frequency response (−10 dB)400–15000 Hz
Mean sound pressure level90 dB (1 W/1 m)
Opening angle (-6 dB)180°/4000 Hz
Resonance frequency fs430 Hz
Magnetic induction1.4 T
Magnetic flux880 µWb
Height of front pole-plate3.5 mm
Voice coil diameter50 mm
Height of winding3 mm
Cut-out106 mm
Net weight1.26 kg
D.C. resistance Rdc6.7 Ω
Mechanical Q factor Qms1.19
Electrical Q factor Qes0.7
Total Q factor Qts0.44
Effective piston area Sd20 cm²
Dynamically moved mass Mms1.2 g
Inductance of the voice coil L0.16 mH
Terminals4.8 x 0.8 mm (+)/2.8 x 0.8 mm (-)
Dimensions and drawings
DSM 50 FFL · 8 Ω · part 1163 — Dimension drawing

Dimension drawing · Open original image

Installation and cabinet guidance

Allow a 106 mm panel opening. The faceplate is 130 mm across the flats with clipped corners, and gives a choice of fixing patterns: four 4.4 mm holes at the corners on a 150 mm circle, or four alternative holes on the axes on a 126 mm circle. Behind the panel allow about 48 mm for the 100 mm rear housing, plus room for the terminals and the wiring. Mark whichever pattern you use from the unit itself, and confirm the depth available 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 800 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. At 1.26 kg it is heavy for a dome, so make sure the baffle and the fixings can carry it. Use an amplifier suitable for the 8 Ω load.

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