Re: Blown amp?
Do not remove the material from the tube. The damping material changes the operation of the tube air from adiabatic (constant heat) to isothermal (constant temperature). With the isothermal process, the damping material absorbs and gives up heat which maintains a more constant temperature inside the tube. This also has the added effect of reducing sound velocity, which shortens the wavelengths and makes the driver "think" it is in a larger air volume
"Shoot For The Top...... The Bottom Is Already Full"
Q u o t e s:
To err is human, but to really foul things up requires a computer. Farmers' Almanac