@JoeyGun... Yes, mine clink & ping a few times as they warm up. However, my speakers are 104db efficient horns so ANY high frequency noise is very apparent. That being said my Psvane Acme 300B also make the same startup pings and had done so for over a year. Frankly I am very happy with the WE 300B performance thus far and with a 5yr warranty have no worries.