Bro, yung mga first series ko ng L-36 galing MB way back early 90's pa, yung nasa pictures na L-36 year 2001 pa (marine ply) around P11,+++ @, kasabay sila nung mga EV MT2 ko... then yung Cerwin Vega L-1815 special order from U.S. (1996) around P17,000@. 
nice catch. the cv l-1815 woofer was first used on the
t36/750 subs. "t" for trapezoidal.
The Intense! T-36/750 subwoofer is compact, loud and clean. Featuring a larger radiating area than direct-radiating woofers, these horns will also array better, maintaining directivity or “throw” over a greater distance. (An array of four or more cabinets will give directivity down to 60 Hz.)
Comparison with the legendary L-36 Portable Earthquake horn is inevitable. This trapezoid-shaped cabinet is smaller (now 13” wide in the rear), yet the mouth size (6 square ft.) and flare cutoff frequency (32 Hz) are the same. Up to five cabinets can be packed side-by-side in a truck.
A new, highly-improved 18” driver was developed to enhance the performance of the T-36/750, and is the main reason the relatively compact T-36/750 outperforms the L-36PE in all parameters (particularly at 32 Hz).
To get more undistorted output, the excursion limits have been increased to 1 1/2" peak-to-peak through the use of a new edge suspension and spider. The diaphragm is Kapok and Kevlar; light yet very strong. The voice coil is very long yet the motor efficiency is three to five times greater than any 18” unit we know of—including the neodymium-iron-boron units claiming such advances.
Sustained high-power operation produces a lot of heat. A distinctive 1/8" thick metal front panel conducts heat out of the cabinet interior while also providing access to the L-1815 driver. This convex-shaped panel produces several other benefits:
Longer horn path for low cutoff frequency
Increased horn air chamber volume for lower system resonance
Symmetrical loading of the subwoofer driver
Increased compression loading of the driver (nearly 3:1) for higher efficiency and improved resistance to infrasonic damage (“dropped” microphone or tonearm)
The cabinet itself is constructed with 3/4" (18mm) SuperPly, an A-surface veneered void-free multiply material which is, pound for pound, stronger than conventional plywood. The result is a rugged, heavy-duty cabinet weighing less than 150 pounds—a relief for muscles and fly rigging.
Heavy-duty casters and handles make moving a one-man job, and the cabinet is equipped with both Neutrik Speakon and 1/4" phone jack (15 amp!) connections. The T-36/750F is also available with the unique MAN side attachments—the quickest and most secure flying system available.
