816 advice please

[bowtie427ss]

if you put your hand on the cab, it feels like its going to expload.

That's "lost" energy that went into the speaker system as an electrical signal from the amplifier, but isn't exiting as sound pressure. This is where the 825/828 benefits significantly from sturdy internal bracing. What you're feeling with your hand is input power being lost in the form of kinetic energy and heat, in a perfect world you should be feeling that energy on your chest and pant legs 20 or 30 feet out in front.

Just my .02.........................

[kieran casey]

Many thanks for the response,
I'm hoping I can get 515s for the project and avoid having to fix the magnetic field by adding another magnet to the 3516s. Though I believe that this would actually improve their sound.
It turns out that my repairman actually visited GPA and met the folks there and talks very warmly about it all.
Kieran