Subwoofer driver design and Subsonic frequency addiction.

[Subsonicspectre]

It all started when I was 16 when I got my first job at a glass company. One of the guys had me clean out the bed of his truck and in the back he had a blown 12" Memphis power reference 12 in a rain sodden particle board box.
He let me have it as he was gonna toss it. Well over time after messing with it, I carefully was able to separate the soft parts without damaging them, from the basket.
After seeing that the coil was burnt, I found where the leads went up on the former and I began to unwind the coil by hand and kept count of the wraps. My dad had a spool of some copper wire and carefully rewound the VC by hand.
At the time I didn't know any better and used Elmer's glue as the adhesive to keep the coil wound in place. I thought I had success until eventually when I got a 250 watt amp. The sub only lasted a week before the coil came apart.
Later on in life when I became interested in folded horns was when I stumbled upon a video of this guy named Virgil that pulled a whopping 165+ db out of a single 8 in a folded horn in a VW Golf, granted he zapped the 8 with 30kw of power. This was not a musical build but strictly a one note wonder spl purpose build. Regardless it had me thinking of the possibilities. To me that was more impressive than a build hitting the same numbers with close to $50,000 in equipment on a strict one note wonder extreme spl purpose build. In my case I want my high spl capability but also have fantastic musical properties. I never got around to building a horn enclosure because at first it was discouraged because it was said results would be poor by my peers.
I've built and designed so many of my own boxes over the years, custom built my own drivers from existing motor platforms running a DD M5 amp. Until one day I did an Audiobahn build using 2 1st generation immortal motors that I did a custom build up on, running off of An old Audiobahn A4KDN 4kw amp. I progressed from my first 150db @42 hz peak clamping 6700 watts with the DD M5 amp wired in the dirt at .25Ω to 153Db at the same frequency wired at 1Ω on the A4KDN clamping 2600 watts.
Sadly I never got to compete with the immortals again because a slug split on one of the immortals before I got the new box built that was larger. The final build I had was a pair of DSS savage 15s wired to 1 ohm on my DD M5. 152 db at 42 hz with the new enclosure. This will be the first time in 3 years I have done a build and a year since I had a system since my previous system got stolen.

[Tom Smit]

Oh boy! That is some serious power (although, I do know that there are folks that run in the 10's of thousands of watts, but, still)

[Subsonicspectre]

Oh definitely . The 8" inch sub also didn't survive the second pass that was required lol