I had an event happen recently that I wanted to get some assistance with. I have a DirectStream DAC and Memory Player. The DAC goes into a Linear Tube Audio MZ2 preamplifier that drives a Linear Tube Audio Ultralinear amplifier. I was playing an SACD of Mahler’s 2nd symphony. This is a very dynamic sacd. Near the end of the symphony right at the climax, the music stopped and instead I got a very high pitched siren sound coming from the speakers-it sounded as if my alarm had gone off in the house-it was scary cause I was afraid this siren like sound would blow my speakers, though they appeared okay after this incident-the sound went away when I turned down the volume knob on the preamplifier. I have played that cd since, only on my headphone system to see if I could duplicate the sound-the cd has played without this happening again. I also have played other cds on my primary system without incident. My assumption is that the preamplifier got overloaded-it does not have a protection circuit, though the amplifier does. The only other new variable was that I did install a new interconnect prior to playing that cd. The other odd thing about this is that right after I turned down the sound on the preamplifier I tried to open the drawer on the memory player and it would not open-it had frozen up-I had to push the reset button on the back before the drawer would open.
Obviously I would like to not have this happen again-any recommendations and advise would be appreciated.