Helix P 1T - 1" Silk Dome Tweeter



There's definitely not much to say about this tweeter - the fantastic sonic performance thrills both the press and end-users since many years. Despite the decent appearance this driver is a "giant" with respect to sound quality. Like its predecessor it easily outperforms competitor products and defines the standard in its class. Precision, resolution and tonality have a short and simple name - P 1T.

  • 1" / 25 mm tweeter with high efficient neodymium magnet and hand-coated silk dome for balanced, natural sound reproduction and lowest compression effects
  • Including installation and mounting equipment
  • Lowest possible production tolerances and solely use of best materials
Power RMS / max.  P 100 / 200 Watts
(highpass > 3,000 Hz at 12 dB/Oct.)
Impedance  Z 4 Ω
DC resistance  Re 3.4 Ω
Frequency response   2,500 Hz - 25,000 Hz
Resonance frequency  Fs 1,500 Hz
Efficiency 1 W / 1 m SPL 91 dB
Voice coil diameter ø 25 mm
Cone area  Sd 4.9 cm²
Moving mass  Mms 0.3 g
Cone material   Silk dome
Outer diameter ø 58 mm / 2.28"
Installation diameter ø 49.3 mm / 1.95"
Installation depth   15 mm / 0.60"
Recommended crossover frequencies for the highpass  
Slope  Minimum crossover frequency
6 dB/Octave  4,000 Hz
12 dB/Octave   > 3,000 Hz
24 dB/Octave  > 2,500 Hz

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