That's fair enough, my whole mindset is that it's better to have something and not need it, than to not have it and need it a lot.
I recently popped into my local cashies shop to see what they had in stock, and saw that they had a Marshall Quad Box going for about $250.00, I'm going to have another close look at it tomorrow while I stop off at Jaycar Electronics (it's right next door to cashies) to buy some new rubber stick-on feet for my Korg FK-1 VCF pedal, I want to find out the impedance and power-rating of the Marshall cab that's at cashies cause I could use it with either my Peavey Renown amp or my Fender Super Twin amp.
I used this web based calculator to build my 2x12 cabinet.
https://www.diyaudioandvideo.com/Cal...akerBoxVolume/
Some of the dimensions I knew I wanted, but others needed to be calculated out. Calculators for things like driver displacement and resonant frequency and the like are all available.
The programs only allow for 1 speaker so I simply doubled the cubic volume for two speakers. My cabinet is also ported which is my compromise to having neither a sealed or open back cabinet.
I used 19mm form ply from the big green shed at $12 per 600x1200mm sheet. 3 sheets for under $40 was the cheapest way I could figure to get a durable black finish and reasonable build material in one hit...
Cabinet is now loaded with two 16 ohm Celestions in parallel to give me a 8 ohms load... 1 x V30 and 1 x Creamback G12H75
Builds-
#18 PBG GSH-1R https://www.buildyourownguitar.com.a...ad.php?t=10236
#17 PBG PBA-4 https://www.buildyourownguitar.com.a...ead.php?t=9984
#16 PBG IB-1Q http://www.buildyourownguitar.com.au...ead.php?t=8754
#15 PBG TLA-12 http://www.buildyourownguitar.com.au...ead.php?t=8444
#14 PBG PRS-1H
#11 Scratch build AC15 clone headhttps://www.buildyourownguitar.com.a...ead.php?t=7686
#09 PBG ES-1TL
#07 partscaster Alder Denim Tele.