I traded my Strata III for a Strata V some time ago. When I tried to calibrate it (about 75 volume on the sub) instead of a continuous sound (that I got with the Strata III) I got small burst of sound as if the sub was switching itself off and then on again and 4 small dots appear on the display. The other night I was watching Star Wars and in the intro of THX in the final explosion it's quite clear that the sub switches itself off. In the AV processor (Tag AV32R DP) the sub is at 0dB so I think that the problem doesn't come from there and I also tried it with a separate audio system (2 channel system) and the problem persists, around 75 to 80 in volume the sub switched itself off and then on again. The position and the cables are also the same that I used in the Strata III. I tried other cables and the problem persists. I'm only using low level. Could someone shed some light? Could it be a problem with the sub?