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Hiquphon OW 4

Pair of Hiquphon OW 4 Tweetes

This precisely crafted high-frequency unit is produced by Hiquphon - a company established by former Scan Speak engineer and manager Oskar Wrønding. The design is similar to Scan Speak D2008 Series, but accuracy and craft are declared by manufacturer as much higher. OW4 is the top product in the range,  with a dome with "Platinum" coating.

This is the manufacturer's brochure  Link To Fostex FE-108 Sigma Manufacturer's Datasheet

Driver Properties Electrical Parameters
Membrane Shape Dome   Nominal Impedance 8 Ω
Membrane Material Coated textile Rated Power 100W
Surround Coated textile Sensitivity 90 dB/W/m
Voice Coil Diameter 20mm Recommended Frequency Range 2.5 - 22KHz
Magnet System Ferrite DC Resistance 8 Ω
Ferrofluid NO Nominal Resonance Frequency 850 Hz
Front Plate Material Plastic   Linear Excursion ± 0.59mm
Rear Chamber YES Voice coil inductance 0.03 mH

Hiquphon OW4 Factory Measurement 

Frequency response curve as is given in the manufacturer's web site

My Measurements

Hiquphon OW4  SPL Responce at 1m on axis and 15 30 deg off axis

Frequency response at 1m with 2.83 V input RED - on axis, BLUE - 15 º off axis, GREEN - 30 º off axis

Hiquphon OW4 Second, Third and Fourth Harmonic

The second, third and fourth harmonic curves measured at 2.83V input RMS.

Hiquphon OW4 Burst decay Responce

Burst decay response, measured at 1m on axis

Hiquphon OW4 Impedence

The impedance curve


Like all the other tweeters from the product line, Hiquphon OW4 has very smooth frequency and harmonic response. The best application should be in upper class three-way or a small two-way loudspeaker systems. 

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