preorder has officially begun. The production 15 and enclosure (3 cubic feet tuned to 32 hertz) has been sent to Pat Turnmire with Redrock Acoustics. While there he will be doing the following. LPM, linear Parameter Measurement or also known as small signal Thiele Small parameters. LSI, Large Signal Identification. Basically Thiele Small parameters with a higher voltage that excites the transducer to normal operating range. When a transducer is played there are parameter shifts that can very greatly from small signal parameters (during small signal testing the cone moves a fraction of a millimeter.) Knowing this information will help design a better enclosure to suit the driver. It will also measure things like xmax including 70% BL(20%distortion), 82%BL (10% distortion), 50% suspension compliance (20% distortion), and other parameters. Power Handling Confirmation, the sub will be mounted in the provided enclosure to verify RMS power ratings based on xmax and thermal compliance of the coil. This will give a real world rating to insure coil failure due to too much power will not be an issue. As of now I am the only small internet company using this testing method to get a proper RMS rating. While these tests are being performed Pat will be creating video tutorials explaining each test, and why its an important step in the design process.