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In Reply to: RE: Gershman A-G crossovers - pic posted by madisonears on February 25, 2021 at 10:20:55
Here's a pic of the tweeter. I was going to do 3 runs of the 20 AWG to each of the + and - from the xover to the tweeter. Twist the ends, loop through the opening in the solder tab and then solder in place. I see the VC wire on the back of the solder tab but I'm not sure what insulation you are referring to?
Follow Ups:
Every voice coil consists of a coil of insulated wire. The insulation is VERY thin and VERY important. If the coil overheats from too much current passing OR from any high heat source such as a soldering iron applied to the input terminals, the insulation will melt and adjacent winds of the coil will short circuit to one another. Dead speaker.
You do NOT need three runs of 20 gauge wire to a tweeter. A single piece of 20ga on each terminal is adequate. There is NO advantage whatsoever to adding excess wire to a tweeter, and it is very likely you can damage the tweeter terminals with too much weight hanging off of them or damaging the voice coil as detailed above.
Peace,
Tom E
berate is 8 and benign is 9
I was not envisioning the coil of wire wrapped around the base of the cone that resides within the magnet.
As far as wire gauge from xover to driver, I assumed one run of 20 AWG to the tweeter would be sufficient. But I want to cover all the bases while I'm in there. Maybe double up? That would be 17 equivalent. It would take 6 runs of 20 AWG to equal the 12 AWG it's replacing.
Then there's the mid and woofer. Would you recommend single runs to those as well? Or would you beef those up by a couple of runs? The Infinity RS-4/B's I bought as back-ups have what appears to be 20 AWG to each driver.
Your advice will be applied accordingly. I like the idea of doubling up from one freq range down to the next. Either way, the sticky stranded copper is coming out. Just need to find the time. Hoping to get started this week.
A single 20 AWG for the tweeter, twist two 20 AWG wires together for the the midrange (17 AWG aggregate/effective gauge), and twist four 20 AWG wires in a bundle for the the woofer (14 AWG aggregate/effective gauge).
You may achieve better integrity between the drivers by using the same wire for all the drivers, but each frequency band with double the cross section as you go lower.
Single 20ga to tweeter is plenty, and there is no advantage to adding more, and, actually, some risk. Double up for the mid, then maybe just leave the humongous stuff on the woofers that is already there. I know it's difficult to let something be when you have a hot iron and wire cutters in your hand, but really all the woofers need is current, and lots of it. Fancy wire will not do much for them. You could try running a strand of the new 20ga in parallel to the existing, see if that improves anything.
berate is 8 and benign is 9
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