Measurements and conclusion
Contents
Response, distortion and resonance
Response, distortion and impulse behavior is very decent from this Focal. Response is pretty straight for example. We see in the distortion a bump around 1500 Hz. That is audible in the reproduction, we find. Resonance is well under control we see in the waterfall; it is quite balanced.
Impedance and phase
It is clear that we are talking about a bass reflex system. The resonance can be seen at 55 Hz. The lowest impedance – around 2.5 ohms – is around 100 Hz. The electrical phase then goes from -50 degrees to the 0 line. That’s pretty mean for a somewhat smaller amplifier; it can run out of breath because voltage and current both go through zero.
