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  3. 186436-94097

Help, Frustrated with Horn output

To you many experts out there. I have a two way speaker, horn and sub ( altec model 19).

Horn goes intermittently out for extended periods of time.

i changed the diaphragm, no luck. Changed the crossover, worked for awhile then no output after a couple of days. I did use a new preamp/amp at first figuring issue must have started there so I eliminated the previous gear out of the equation.

Would really appreciate some suggestions about this issue I’ve been pulling my hair out for months on. Been a lurker for years on the site and know theres a lot smarter people out there than me.

Thanks in advance 

rush9
mlsstl
1,436 posts
 

This model looks like it has potentiometers to adjust the high frequency level. My first thought are that the pots are dirty or corroded. Try some contact cleaner on them and run them back and forth a number of times. If really bad, they may need replacement. 

 

rush9 OP
2 posts
 

Great input, been trying recommendations.

So far still having same issue however I removed driver from the horn then opened it to get to diaphragm. Tested with ohm meter at 6.9, in the process noticed a suspicious factory connection to the female spade terminal.

Crimped over the insulation of wire! Did a continuity test got shaky when I twisted wire. Going out now to buy replacement wire, spade and o ring to replace the wire and terminals. Will update after i install. Keeping my fingers crossed.

rush9 OP
2 posts
 

Update-Just replaced the negative wire leading from the the terminal to the diaphragm and pow it works (for now) only time will tell.

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