WE have a cdi2000 with 220.127.116.11 firmware powering our subs in bridge-mono mode.
Signal comes in and registers on the amp input meter. However, if the input signal is less than -5 db for a period (eg. 2 min), the amp drops the output. We still continue to see the same input signal coming in so the input signal has not changed.
If we raise the input signal again to (additional 5-10 db), all of a sudden the amp will begin sending output to the subs again. But the levels are too loud, so we pull back the input signal to a reasonable level and eventually the output from the amp drops again. The dropping out takes place instantaneously at some point (pretty consistently at 2 min).
If we maintain the higher input signal (so the input level showing on the amp is just under peaking), the amp keeps the output signal on.
the only signal processing we have running on the amp is a 90Hz LPF.
Any explanations for this behavior are appreciated. Even more appreciated are suggestions in how to correct this. thanks
Update: We left the unit running after it cut out without boosting input signal. After 1 1/2 minutes, output came back for 30 sec then dropped off again....