BlieSMa M74A-6 74mm midrange speakers Aluminium dome 6 ohm

Bliesma M74A-6 midrange features 74 mm AlMg-alloy dome with varable thickness.

Single-layer ribbon CCAW (Copper-clad Aluminum Wire) voice coil of Bliesma M74A-6 is wound on titanium former.

Wire terminals are gold-plated.

Thick aluminium mounting flange of Bliesma M74A-6 is powder coated, aluminium rear chamber is filled with natural wool damping.

Characteristics :

• 4 mm variable thickness aluminium-magnesium alloy dome unusually wide coverage
• Best impulse response and high efficiency (95dB @ 2.83V)
• Recommended frequency range 400 Hz-6 kHz
• Membrane resonance at about 12kHz
• Extremely low moving mass for improved dynamics, response and higher efficiency
• Fully saturated copper-capped neodymium motor for low non-linear distortion and exceptionally low intermodulation distortion 2.4 mm linear excursion and large vent channel for undistorted playback at low frequencies
• Flush-mounted surround and rear-mounted magnet system for a flat frequency response and a wide off-axis response.
• No ferrofluid for improved dynamics
• Copper-coated aluminum underhung voice coil on titanium bobbin
• Flexible and lightweight connection wires, made in Denmark
• Thick, powder-coated aluminum flange
• Aluminum rear chamber with natural wool damping
• Gold plated wire connectors

Specifications :

• Nominal Impedance: 6Ω
• Rated power* - W
• Sensitivity 2.83V/1m 95dB
• Net weight 0.68kg
• Effective piston area, Sd 50.25 cm²
• Moving mass, Mms 2.3 g
• Force factor, Bl 6.8 T*m
• Resonance frequency, Fs 400 Hz
• Mechanical Q factor, Qms 6.4
• Electrical Q factor, Qes 0.75
• Overall Q-factor, Qts 0.67
• Magnetic flux density 1.35 T
• Air gap height 4.2 mm
• Linear excursion (p-p) 2.4 mm
• Voice coil diameter 74 mm
• Voice coil height 1.8 mm
• Voice coil layers 1
• Voice coil inductance, Le 0.036 mH
• DC resistance, Re 5.6 Ω
• Wire material CCAW
• * IEC 268-5, 2nd order high-pass Butterworth filter, 400 Hz