WHAT SIZE Fast-on-terminals are used on typical loudspeakers?

[nevetslab]

I"m in the process of cobbling an Ampeg SVT-410HLF bass cabinet using what IS still working from a blown SVT810E cabinet. So, I've got four potential speakers, all 32 ohm from the 810 cabinet, and moving them over to the 410 cabinet. What was inside it were 4 ohm speakers, series-parallel. So, gotta change that to four 32 ohm speakers, all in parallel. So, there's not enough interconnecting wires, and need to make some more.

I didn't have my calipers with me at the Guitar Dept where my work station is set up for the loudspeaker maintenance. Brought one of the speakers with me back to my shop up the street to confirm what these are, since it looked larger than 0.187". 0.210" Wide x 0.020" thick blades on the speaker. And, of course, 0.187" x 020" female fast-on's will NOT fit. And, 0.250" x 0.032" just fall off, without crimping down the openings.

Who sells 0.210" x 0.020" Female Fast-on's these days? Why the dickens has the loudspeaker industry standardized on these? So much for a quick trip to the shop and back with the necessary terminals, crimp tool and wire to resume cobbling. Sigh..................

[The Dude]

I'm not aware of anything in between the sizes you have. If crimping down the openings of the 1/4" connectors doesn't seem like it's a sturdy connection, it might be time to get out the solder iron.

[g1]

Sounds like maybe metric?

[The Dude]

Oh hell,...... Now he's going to have to buy a metric crimper, too?

[g1]

I see there is a .205 x .02" aka 5.2 x .5mm

[SoulFetish]

the can almost always get .187" on these (at least with the tolerances of the molex kind I have). But parts-express has......here:
0.205" (16-14) Female Disconnect Crimp Terminal Blue 50 Pcs.
300 Piece Speaker Crimp Connector Kit

[Enzo]

They haven't changed in ages, and I used to stock that exact size in my tool kit. I got them at Mouser, but other suppliers would have them. 205 sounds right to me, the 187 are ever so too small.

I gave my stock of crimp connectors to my tech pal recently. I just sent a note to ask him to get the stock number off the bag.

[nevetslab]

I see there is a .205 x .02" aka 5.2 x .5mm

THAT's the one. I went to Pacific Radio in Burbank, right down the street from our new building, which supports the audio & video business in Hollywood, Burbank and you used to be able to find anything you needed. They don't stock ANY quick-disconnects now.........no call for them, was the stupid answer I got.

I was able to find some 1/4" female uninsulated fast-ons at Luky's Surplus Hardware, which had a spring-ramp in the mating area, and, when I tried them on the speaker terminals, after straightening them, the starting width at the rivet of the fiber board where the voice coil lead wires attach, THAT portion of the terminals IS 1/4", then narrows down to 0.210"...at least that's what I measured with my calipers. Pushing them on to those, it did fit nice and snug, so for the immediate task, that got the connections made.

Molex, huh.......looking.........found it.....P/N 190170018. Gotta order those, as I'll be needing them with a warehouse full of cabinets.

[Enzo]

159-2239A is MOuser stock number.

https://www.mouser.com/ProductDetail...52By0OxNBOk%3D

[nevetslab]

159-2239A is MOuser stock number.

https://www.mouser.com/ProductDetail...52By0OxNBOk%3D

Thanks, Enzo! I looked at that part, seeing it was substantially cheaper than the Molex part. While I like the partially insulated Molex part for crimping, the Kobiconn part is a good alternative.

[Enzo]

Is your crimper just a crusher? Or does it have the little point? For round barrel crimps like that Kobicon, I use the crimper with a small point on one side, so it not only compresses the barrel, but also pushes into the wall of the barrel to make a bump inside the barrel into the conductor.

And if I want to add some solder, I don't have to pull off the plastic thingie.

[nevetslab]

Is your crimper just a crusher? Or does it have the little point? For round barrel crimps like that Kobicon, I use the crimper with a small point on one side, so it not only compresses the barrel, but also pushes into the wall of the barrel to make a bump inside the barrel into the conductor.

And if I want to add some solder, I don't have to pull off the plastic thingie.

It's one of the Kline Crimp Tools, has two sizes, adds the dimple in the back side of the crimp, as well as another that works on the insulated style, that being a crusher. Solid tools.......been with me for decades now. Also have some other ratcheting ones for those having the separate wire crimp and insulation crimp wings. Good point on the soldering. I was about to order both types.

[Enzo]

The Kline plier is a good one. I never had a ratcheting crimper, but if I were to do a lot of BNC or something I might invest in one.

Yes, dimple, better word than what I used.

When I do need to remove the plastic thingie, I hold the terminal down to a hunk of wood with my soldering iron for a moment, while gripping the plastic with my dikes. I give a little pull, and when the plastic softens a little it pulls right off.

[g1]

I bought one of the ratcheting crimpers, it was only $20 bucks or so. Worth every penny, just for the look of the crimps alone it's worth it.

[SoulFetish]

Bought a greenlee off a friend hardly used, and it’s one of the best tools I have. Worth every penny, and wouldn’t be without one. Use it almost daily. Have dies for insulated, non insulated, and open barrel. If you can swing for one, I highly recommend it.




Greenlee bought the Paladin line so all the dies are interchangeable