Hi everyone. This is my first post here.
A little bit of background on how I ended up here... I’m 32 years old and have been fascinated (obsessed) with hifi since a young age. I’ve had all manner of equipment over the years and have just started to venture into vintage gear. I restored a pair of AR4-xa speakers a couple of months back and was so impressed by the sound of them that I wanted to see what else AR did. This has led me to a pair of AR-3a in need of work.
The pair I have were acquired from a guy who had refoamed the woofers. He said the sound was muffled on the speakers. I took a punt on them after doing a bit of research, and deduced that the pots were the problem.
Upon getting the speakers to my house, the first thing I checked was the woofers for coil rub. One woofer was absolutely fine, but the other made that dreaded rubbing sound when pushing it in. I’m hoping this is just down to a bad refoam job, as when you push it slightly off axis, the coil rub is gone. So the plan here is to refoam this woofer.
I then fired them up and low and behold, the mids and tweeters were making no sound at all. Upon messing about with pots, I managed to get sound out of the midrange, but not the tweeter. Both pots were obviously faulty, as you could twist them right the way around
My next job was to attemp to clean the pots. I opened them up and they were obviously corroded. I cleaned them up with some wire wool and contact cleaner. They looked visually okay to me. Wired everything back up and played some music. I only had sound through the tweeter, and it was intermittent when rotating the pot. The mid made no sound at all (this was the other speaker to the one I had previously tested with the intermittent mid), but I didn’t test whether it worked before cleaning the pots.
I then removed the drivers from the cabinet and tested them off of a low level signal from my amplifier. All drivers played okay. So either the pots are no good, or there is an issue with the crossover.
O am either going to replace with L-pads or try and source the correct pots. How do the L-pads affect the sound compared to the pots?
Also, another issue I have is that I stupidly snipped off the copper wire from the mid to the tags on the front wired terminal thing. I didn’t realise the wire was wrapped around the the tag, and was struggling to remove, so I just snipped it off. Problem now is the wire is too short to reach the terminal. What can I buy to reattach the wire to the tag? I guess it is some sort of copper braided wire?
For clarity, I live in the UK and my pair are the standard AR-3A with the European cabinet.