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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
mrdecibel
3,067 posts
 

You can try the battery test. Connect a 9v ( what I use ) ( or an AA, C, or D battery straight to the tweeter, bypassing the crossover, and see if it stays on. This will tell you if it is or not the tweeter. My best, MrD.

erik_squires
16,561 posts
 

OP:  So does this happen only on one side? 

 

erik_squires
16,561 posts
 

OP:

 

By the way, not sure if this would help you, but you can use Dayton DATS to fully chart the impedance of your speaker. If you can compare one side to the other, or have a published impedance curve you can use it to fully diagnose the speaker and crossover.

Another diagnostic approach is to swap components L to R and see when the problem moves with the swap.

 

Best,

Erik

mlsstl
1,452 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.

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