Design Features
The M5 enclosure is a textured black vinyl clad 5/8” thick MDF cabinet with an internal volume of
5.3liters and a front firing slotted port tuning the system to 70Hz. The low frequency character of the M5 follows a classic 4th order Butterworth vented alignment with smooth response extending down well below system tuning. Small panel size and strategically placed internal bracing reduces wall flex- ing and mid-band resonance. High cabinet rigidity also improves low frequency mid-bass coupling.
The M5 tweeter uses a proprietary 25mm silk dome and exponential horn waveguide combination. The 133mm (51/4”) M5 mid-bass driver is a custom designed and manufactured speaker specific to this new Hafler monitor. This woofer uses a polypropylene cone with a nitrile rubber edge for fast, efficient low frequency damping and uniform piston control. The cone’s polypropylene material is mineral loaded and adds the required stiffness to maintain a smooth response character well past the system’s crossover point. The increased cone rigidity also helps minimize inter-modulation distortion (IMD) components. IMD at normal playback levels is not just an audible distraction it’s a contributor to listening fatigue.
The linear characteristic of the multi-rolled flat spider and the nitrile rubber edge also ensures low lev- els of harmonic distortion (THD). High magnetic linearity is achieved by using a long 32mm (11/4”) diameter voice coil set in a computer optimized magnet structure. The 4.2 lb magnet assembly is completely shielded for use near video monitors or other CRT devices. The M5 mid-bass driver is carefully designed and constructed to be both thermally and mechanically capable of handling the 200-watt system power rating.
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