Arkless Electronics
Trade: Amp design and repairs.
I used to do custom in car entertainment installation, anything from swapping out a head unit or speakers, to completely panelling out a van and building a PA system on wheels, with all the electrical system to feed it. I’ve had quite a few jobs brought to me to tidy up after someone else’s “handy work”, and bad soldering is extremely common, but the best I saw was where someone (an absolute cock breath of an individual) I know had significantly under cut my price for a mutual friend, now here’s the thing, I’d not quoted a rip off price, I’d quoted a very appropriate price considering the parts involved... Keith (the cock breath), managed to under cut me by saving on things like fuses, fuse carriers, grommets, and cable... he drilled a hole in the bulkhead, really badly and in a structural area, but saving on cable length and labour time, pulled the cable tight (this was a 2 gauge power cable) through the hole, it was stretched round to the battery... he didn’t bother upgrading the battery, alternator or any other wiring... just as well really because it was the negative/ground wire between the battery and the car body that became the fuse/current limiter when the power cable wore through. The battery, battery tray, the ground wire and some other cabling and components in close proximity were melted but thankfully the battery drained before the car could completely catch fire. I managed to repair and rectify all the damage for under £500 luckily, but it could’ve cost him his car, and his insurance would’ve told him to f##k off
That could have ended up much worse!
Not as dangerous but another customer once sent me a TOTR old Pioneer amp for fettling and when I opened it up I found that he'd tried "improving" it himself... there were solder splashes everywhere, dry joints, electrolytics the wrong way round and... wait for this... he'd cut every wire for some reason and then reconnected them all by baring the ends, twisting them together and wrapping them in sellotape! He was told to arrange for his courier to collect this abortion tout sweet as I would not be touching it.