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- 1 inch exit throat
- 109 dB SPL 1W / 1m average sensitivity
- 25,4 mm (1 in) edgewound aluminum voice coil
- 50 Watt program power handling
- Low weight, easy mounting and handling structure
- Usable in two way or multiway systems
DescriptionThe HD125 1 inch exit HF unit has been designed as the natural evolution of the industry standard HD120 compression driver. It delivers an unmatched combination of extended linear frequency response and very high efficiency.
The HD125 diaphragm assembly is made in proprietary treated polyethylene material. This design maintains the minimum resonance frequency point value at 1600 Hz, extending the frequency response in the mid region when compared to HD120 compression driver.
The design of diaphragm and its surround in polyester material allow a best movement and stress control; the special radial ribs increase stiffness avoiding uncontrolled vibration modes in the usable frequency range.
An edge-wound aluminum voice coil, wounded on proprietary treated Nomex, completes diaphragm assembly. Thanks to its physical properties, the voice coil former shows 30% higher value of tensile elongation at working operative temperature (200°C) when compared to Kapton. This plus is capable to keep properly energy transfer control to the dome in real working conditions. Moreover, this particular former material is suitable to work also in higher moisture contents environments.
The polypropylene phase plug is the result of a meticulous design exercise. Its shape assures the correct acoustic impedance of the radiating dome, reducing distortion levels across a very wide frequency range. At the end, it results in a smooth coherent wavefront in the horn entrance, high thermal stability and manufacturing consistency.
The HD125 compact size and lightweight ceramic magnet assembly has been designed to obtain 16 KGauss in the gap.
Throat Diameter 25,4 mm (1 in) Rated Impedance 8 Ohm DC Resistance 5,7 Ohm Minimum Impedance 8 Ohm 5000Hz AES Power 25 W above 2,5 kHz Program Power 50 W above 2,5 kHz Sensitivity 109 dB Frequency Range 2 kHz ÷ 18 kHz Recomm. Xover Frequency 2500 Hz (12dB/oct slope) Diaphragm Material Polyester Voice Coil Diameter 25,4 mm (1 in) Voice Coil Winding Material Edge-wound aluminum Magnet Material Ferrite Flux Density 1,65 T BL Factor 3,5 N/A Polarity Positive voltage on + terminal gives positive pressure in the throat
Overall diameter 87 mm (3,4 in) N. of mounting holes and bolt 2 M5 at 180 degrees Bolt circle diameter 76 mm (3 in) Total depth 46 mm (1,8 in) Net weight 0,8 Kg (1,77 lb) Shipping weight 0,9 Kg (1,99 lb) CardBoard Packaging dimensions 90x90x70 mm(3,5x3,5x2,8 in)
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