To refurbish some old transmission line speakers, I removed all the damping and installed bracing. I am now finding it difficult to replace the damping material as the line width is only about 3 inches by 13.5 inches. I don't have room to reach my arm in and evenly distribute the stuff. One speaker now shows about 3-5dB less output below about 50Hz. I am thinking I could more easily snake some 1 inch batting thru the line. My thought is to center the one inch material in the 3 inch dimension across the 13.5 inch width. I would put loose Acousta-Stuff behind the woofer (10") and then use about 3 feet of batting. That would leave the last 2 feet of the 6 foot line empty. This would compute to the same 0.5 lbs/cubic foot density as the original. I am Biamping with line level 150Hz crossovers and applying eq. Any thoughts on how this might work?
No thoughts on how Acousta-Stuff compares with the original material.
You may be able to pull the old material through by attaching a weight (washer, nut and bolt) on the end of a string, fish it through the line, then wrap the string around the damping material like a barber pole, tension the string and pull it and the material through.
You may be able to pull the old material through by attaching a weight (washer, nut and bolt) on the end of a string, fish it through the line, then wrap the string around the damping material like a barber pole, tension the string and pull it and the material through.