Last practice, about 2 songs in, I lost a ton of volume and all of my low-end. Total volume was way down, but I noticed that the E string was all upper harmonics and was much quieter than the D and G strings. At first I switched my bass to passive mode to make sure it wasn't a battery, then I figured it was my amp, so I plugged my amp into my guitarist's cab, and BOOM there is all my volume and low-end, it sounded perfect. So it's definitely the cab (a Carvin RL410T). I tried turning my amp up to about 5 (3 is usually where I run it for a clean sound, it's a non-master tube amp). No more volume, some distortion. I turn it up to 7, heavily distorted, still no more volume. I brought it home tonight, took the grate off and examined each speaker individually. All 4 are bouncing when I put signal through it. When I gently push each one in, there's no scraping sound, and all 4 of them move easily. So none of them SEEM blown. I took off the back plate, and I don't see any burn marks or loose wires. I tried my amp one more time through another cab, and it sounded perfect, tons of bass and volume. I thought about just bypassing the crossover and going straight from the input jack to the speakers, but it's not all open wiring like my Avatar; it's all PCB-mounted jacks and components. Any ideas here?