Eighteen Sound HD1040-8 — 1" Compression Driver

The Eighteen Sound HD1040-8 is a professional 1" compression driver with 8 ohm impedance. It is developed for high-quality treble reproduction in PA systems, line array modules and monitors. With a titanium diaphragm, 44 mm voice coil and ventilated magnet structure, it offers high sensitivity, low distortion and long life even under continuous load.

Technical data

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• Throat diameter: 1" (25.4 mm)
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• Impedance: 8 ohms
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• Sensitivity: ≈107 dB (1 W / 1 m)
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• Rated power: 40 W AES
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• Program power: 80 W
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• Frequency range: 1.5–18 kHz
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• Voice coil: 44 mm (1.75") aluminum, edgewound
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• Diaphragm: Titanium
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• Magnet: Ferrite
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• Weight: ≈2.0 kg
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Thiele/Small parameters

Fs: ≈1.5 kHz

Re: 5.3 Ω

Bolt Circle Diameter: 76mm (3")

Total depth: ≈85 mm

Recommended use

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• Tweeter in professional PA systems
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• Cabinet: Line array, two-way and three-way systems
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• Crossover guidelines: HP ≥1.8 kHz (12 dB/octave or steeper)
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• Designed for high reliability and clear treble reproduction
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Item no.

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• Manufacturer: Eighteen Sound
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• Model: HD1040-8
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• Category: Compression driver / HF driver
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