Helix P3M 75 mm cone midrange driver

The P 3M is the perfect complement to any fully active 2-way loudspeaker system. Its lightweight fiberglass-paper compound diaphragm guarantees excellent impulse response and maximum freedom from coloration, while the efficient neodymium magnet system ensures low-distortion operation. The flow-optimized basket not only prevents rear reflections but also, thanks to optimal voice coil ventilation, ensures compression-free reproduction. In a closed and damped enclosure, the P 3M unfolds its full sonic potential.

Features

• 75 mm cone midrange driver with innovative fiberglass-paper compound diaphragm for maximum rigidity at
  lowest weight and optimal internal damping
• Highly efficient, compact neodymium magnet system for linear drive and minimal distortion
• Low-resonance basket made of fiberglass-reinforced plastic with optimized voice coil ventilation for high power handling
• Grille included

Technical Specifications

RMS / Max. Power	P	75 / 150 Watt (High pass > 400 Hz at 24 dB/Oct.)
Impedance	Z	4 Ω
DC resistance	Re	3.3 Ω
Frequency range		400 Hz - 5,000 Hz
Resonance frequency	Fs	130 Hz
Mechanical quality	Qms	4.72
Electrical quality	Qes	0.50
Overall quality	Qts	0.45
Compliance	Cms	415 µm/N
Equivalent volume	Vas	0.54 L
Force factor	B*I	4.4 Tm
Efficiency 1 W / 1 m	SPL	86 dB
Membrane area	Sd	30 cm²
Moving mass	Mms	3.7 g
Membrane material		Glass fiber paper compound membrane
Mechanical resistance	Rms	0.63 kg/s
Voice coil diameter	ø	25 mm
Voice coil winding width		8 mm
Max. linear diaphragm stroke	Xmax	+/- 2 mm
Outer diameter	ø	90 mm
Installation diameter	ø	73 mm
Installation depth		37 mm
Recommended Enclosure Volumes
Closed Enclosure with at least 200 ml Net Volume
Net Volumes		Recommended DSP / Amplifier Settings
0.2 Liters (System Resonance: 230 Hz)		Separation frequency: 500 Hz Min. slope: 12 dB/oct.
0.4 liters (system resonance: 190 Hz)		Separation frequency: 450 Hz Min. slope: 18 dB/Oct.
0.6 liters (system resonance: 170 Hz)		Separation frequency: 400 Hz Min. slope: 24 dB/Oct.

Note: The enclosure should always be completely filled with damping material.

Scope of delivery

2 x HELIX P 3M midrange drivers
2 x grilles
1 x datasheet
1 x mounting template