Hafler M5 - Manual (Page 7)

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The M5 enclosure is a textured black vinyl clad 5/8 ” thick MDF cabinet with an internal volume of
5.3 liters 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 (5
1/4 ”) 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 (1
1/4 ”)
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.
Design Features