More likely the amp than the woof
Dr House here - I would expect it is your relatively small 60wpc amp clipping and not the 2235 bottoming! I had a DH500 clipping into my L100T's and making a click, suspected it was the woofers but it turned out to be the amp - the 12" woof could take more than the DH500's 250wpc rms so I think it unlikely 60wpc is bottoming your 2235. I can put more than my Mac's 350watts into my L300, 4430, 4435's with no issue. "...more speakers are damaged by low power than high power...." Now if you hear it rubbing all the time the 2235 may be damaged but if it clicks at high volumes it is almost certainly your amp. A misleading thing is your volume control as the pre-amp section always has more voltage amplification than needed to overdrive the power-amp section. Most amps I've used start clipping with the control at 12 o'clock - what appears to be 1/2 volume is in fact enough pre-amp output to overdrive your power amp.