All good advice above. Assuming ampler is not the problem its probably a blown driver. Check each driver with an Ohm meter and see if you have any out of spec.
B&W 802 Nautilus speakers
When playing music with the B&W speakers they will cut out with no sound and then the sound will return. at low levels this happens but not with higher volumes and the sound and does not cut out. The amps that I'm using are brand-new so I want to know if you think the crossovers in the speakers are bad?