speaker cone expand and contract when power on SA-3

ferringi

Member
2010-09-14 4:14 pm
dear all,

Recently found out that when i turn out my threshold SA3 power amp, the speaker cone will start to poping out and contracting for 3 to 4 times. Its pretty scarely seeing both my left and right speaker are expanding and contracting in different phase, the speaker cone is being pushed to the extreme as if the rubber seal as it is going to burst.

Would like to seek the advice/ explain what is the cause of this problem?

thanks in advance
 

ferringi

Member
2010-09-14 4:14 pm
My heart sink when seeing my beloved speaker being torture like that.
BTW, the SA3 is pair with audio research SP9 preamp (still hunting for FET 10) and denon player.Nvr strike my mind that this involve the preamp.

will replace with other preamp and CD player this evening and update you guys

thanks..