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[Tim Padrick]

Gian wrote on Thu, 18 November 2004 10:10

Any benefit from using a crimp lug on the wire then mating to the speakon tab and soldering that connection?  Should provide excellent mechanical and electrical connection.

Soldering makes the lug redundant.

If you ever need to change the way the thing is wired, it can be quite a pita.

[Tim Padrick]

lee patzius wrote on Thu, 18 November 2004 10:08

IMO Crimp connections are best for the purpose. Crimp connectors will outlast a solder joint during abuse testing. But all crimp connection failures I've seen were: 1) Not enough copper inserted past the crimp area. (wire pinches outward) 2) Crimp force not in the middle of crimp area. 3) Wrong crimp tool (pliers = bad) 4) Cheap crimp tool. (multi-purpose threaded screw-cutter  stripper crimpers with those square dies.) 5) Wrong crimp die. (oval is for insulated, "C" shaped for bare, avoid square dies, see #4) 6) Wire too small, and crimp barrel too large, and vise versa. 7) Crimped onto wire's insulation see #5. Cheap no-name generic counterfit crimp connectors. 9) Overheated 10) Metal fatigued. Abused or wrong connector for purpose. 11) Too many wires installed. 12) Not crimped by me   I get excellent results with T&B and Panduit crimp connectors.  (or "Stakons") One thing I do is strip the wire long enough so it inserts all the way through, and slightly past, the crimp barrel area, whereas the copper strands go slightly past the wire stop. When crimping dead center of the crimp barrel, (Which is NOT dead center of the outer insulated barrel covering BTW) the free-ended section of copper will fan out, increasing pullout resistance.

Done properly, crimps work.  PROPERLY is the magic word.  Why use something that has so much scope for improper implementation when something more reliable is available?  All of the crimp and FastOn failures I've seen were in factory made components, not weekend warrior PA gear.  The sweat solder connection on a speakon offers a joint with 100% contact area joint (vs. a very low percentage with a FastOn or a spade-on-binding post joint) with (in my experience) high reliability.  (Getting a pair of 12 gauge wires on there is a bit of a trick, but isn't bad once you do it a few times.)

[Mike Pyle]

Why don't they just make the panel mount connectors with the same type wire termination that the male cable ends have?

Simple, secure and servicable.

[Bud Bolf]

 Howdy,
Has anyone tried the NL4MP-ST? These have Screw Terminals.
  Thanks,
    Bud  

NL4MP-ST:
    4 pole chassis connector with screw termination. D-size flange.

Mechanical
- Chassis: screw type terminals (4 mm2 / AWG 12) stranded/solid
Solderability complies with IEC 68-2-20

[Mike Pyle]

"Ask and Ye shall receive..."