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Composite DIY 2x8

A while back I decided to build a 2x8 from cut offs of honeycomb pannels we have at the boat factory where I work. These cut offs are between 10mm and 20mm thick. I wanted it to be slim and high so that I wouldn't need to elevate the cab when playing.
After trimming the pieces to size they got glued together using putty and then the entire cab was covered inside and out in one layer of fiberglass with resin. Then some bracing was added, 2 front to back and 3 side to side.
The BLANKO branded speakers I bought on ebay for 30$ a pair were advertised as 8ohm 100 watt, with a frequency range of 55 - 9000Hz.

some pics from the process
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The vents are made from PVC pipe

20200830_132518.jpg


There are 3 braces side to side in the finished cab

20200830_151409.jpg


The baffle getting the edges reinforced

20200830_132559.jpg


The finished product minus the handle that was added later

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Evidently I did not care much for a pretty finish but I am very pleased with the result. The cab weighs 9kg ot just under 20 pounds and it sounds much better than dared to hope. Granted, I play in a duo with acoustic guitar so I don't need tooth rattling volume but l like it better than the Eden I have been playing for years.
Plus it's a laugh wenn people realize how much lighter the cab is than one would expect from its size:D
 
Just a thought... use cardboard mailing tubes for vents and cross braces.
They weigh less than PVC.

The strength in the cross braces is in the longitudinal dimension, so cardboard tubes have merit here.
Grill cloth is lighter alternative than the current perforated steel used on most commercial cabs.