Ok, here is a bit more in depth response:
Music is mostly transients. So peak voltage is often in the midrange. When a amplifier is delivering current to woofers that are normally lower in impedance and therefore peak current increases and the power supply rails drop 10 - 15 %. Removing the current demands of driving the woofer with a high-pass allows the rails to remain at a higher voltage allowing higher voltage peak in the mids which minimizes clipping. Impedance of most speakers is higher in the mids than woofer frequencies.
Using the sub and high-pass helps. Some however, take this too far as piano transients especially, can clip an amp, which is mostlly voltage as the impedance is apx 8 ohms on the Model 3 and the woofer below 4 ohms.
I hope this clears up what I was trying to state earlier in this thread. Thanks.
