JBL S312 Main / Stereo Speaker "nad amp problems" Questions

...amp and one of the speakers come fullrange while the other side shows flashes or sparks in the cone region of the main top speaker/driver.These speakers are powered by a NAD 350 and have very little ...

...NAD T760 Amp). Fiddled around with the wiring, cleaned the connection, and suddenly it worked...for a while. While the Right front worked I tested it in Stereo mode, and suddenly the Left front ...

...and it had to be replaced... I actually blew the speaker many times using a NAD amp as there were spikes coming from the amp. I changed the amp to a Marantz PM7200 and have had no problems

...NAD amp have a good damping factor? Please offer your oppinions (cost effective oppinions) Dear friend....Why you dont join to my proyect???? See? I love my JBL s312 II . I been getting drunk on them ...

...amp distortion:clipping protectio Have taken the speakers with the amplifiers (NAD 35 watt and Arcam Delta 290 75 watt) back to the shop they were sold by but could not replicate the fault !! Only ...