Originally Posted by Jim Fogle
Very clean assembly Simon. What's holding the two capacitors to the assembly base? Is that an off-the-shelf assembled circuit board you purchased or did you purchase bare board and components then assemble the circuit board?

Cute project case too. If I was a manufacturer I'd hire you as a purchased or engineering technician. You do good work and chose nice stuff.
Capacitors are held in with some hot glue. They connect in series to the speaker driver to create a high pass filter at around 160hz - I did this partly to suppress DC and pops from the amplifier. The amplifier board is off the shelf with some slight modification. Case is off the shelf too, I simply drilled and cut what I needed to (hence the pen marks still visible on the inside lol).

Thanks for the compliments! I used to do this kind of work professionally, as it's what I first went to college for - and what I second went to college for was audio engineering, which also guided my choice in parts.

Originally Posted by Gordon Scott
Hmm ... no shroud or heatshrink on the mains power ... of course in the UK we're on 240V, which bites harder. whistle
There is heat shrink on the mains connections, I just didn't bother on the ground connection which is the only one clearly visible.

Originally Posted by Guitarhacker
Simon, that is some pretty work. Looks like a lot of technology in that box. I'm assuming it's got it's own power supply and amplifier and takes a line level input or just plug the guitar straight in?

But.....

Serious build. Back in the day, a floor switch to switch from the speaker cabinet to the horn driver. A passive crossover (maybe) and a large wine bag and a couple of feet of plastic tubing or in a box at the bottom of the mic stand.
Yep, power supply and amplifier built in, uses a 1/4" plug on the front. Technically it can take a guitar straight in, but typically you'd want some distortion on it first so it works best with effect output or line level. I've seen the pedal-sized ones (both professional and DIY) but I wanted something more powerful with a lower frequency range, and the driver I chose is WAY too big for even the biggest pedal enclosure.

I work here