labyrinth porting

the "frequency response" of the woofer will not tell you how low it will play. it will play down to 1Hz if you want. A t-line will lower power handling but plays low...very low. Down the Radiation CD from the PWK Designs website and play the tones...test what frequency the bass drops off at.Custom Enclosure Design

Oh I have done that. The track where it counts down the freqs, It stopped just after they said 30. I had to get out of the car, no cd I have goes that low. The dash was vibrating so hard I thought the airbags were going to deploy. I didn't hear anyting until about 60, but I have the HU LP set to 63. Do I use the track of continuous bass to set my gain on the sub amp? I thought to start adjusting until it distorts then back off just under that point. I have read the thread for setting gains numerous times but want to be sure I am not missing something.