XVR-1 - Pass Labs

Real Project #2This is a much more complex system. It has twin 21 inch subwoofers mounted in a 12 footlong transmission line, a 12 inch woofer for midbass, a 5 inch midrange, and a ribbontweeter. This system will be quad-amped.We start with the raw curve of the subwoofer:The response curve here shows some interaction with the room in the region below 100 Hz,but we see a clearly rising output as we go up toward 100 Hz, and we surmise that thewoofer is going to need some equalization to be flat at 20 Hz. We try a Low pass filter at 6dB/oct (1 pole) at 22 Hz, and at 12 db/oct (2 pole) at 22 Hz with the following results:27