The crossover design on these speakers is a bit different than what you normally see, but from an operational standpoint it is pretty straightforward. The woofer has a fairly fl at frequency response with some slight breakup up high. So, the combination of the fi rst order lowpass and the series notch fi lter provide a nice smooth 2nd order acoustic rolloff. The tweeter uses a second order highpass fi lter with a single padding resistor. The resultant crossover point is approximately 2700 Hz.

Since we are making a home theater system, it is important to maintain a consistent timbre across all of the speakers. As such, the MTM "center channel" speaker uses a very similar topology as the MT satellites. While this is not ideal from an off-axis listening standpoint, it does provide the most consistent sound across the front three speakers. Note that the MTM design has the two woofers in series, which keeps the impedance high. Experimentally, I found that even with the two in series, the sensitivity is still a little higher than on the MT designs.