[HAM] Single louver horn compartment damping material?

[goffmac747 at aol.com]

  Popular xover points for a horn and woofer as musical instruments or P.A.'s were concerned, are 500, 800 and 1200.
    
 -----Original Message-----
 From: thermionic27609 at earthlink.net
 To: hammond at zeni.net
 Sent: Fri, 6 Apr 2007 10:39 AM
 Subject: Re: [HAM] Single louver horn compartment damping material?
 
  
On Apr 6, 2007, at 12:27 PM, OF wrote:

> At 08:51 AM 4/6/2007, John Doyle wrote:
>
>> Of course they could be different Scott.
>
> I was looking to learn something John, for instance, was the crossover
> design known to have been changed? No need to get snotty.

The crossover design wasn't changed, but the parts they were made  
with did change. For example, the later crossovers have that two-in- 
one capacitor package with three wires coming out. The part with the  
most effect on sound is the 7.8uF capacitor in series with the horn,  
simply because it affects or potentially colors one way or the other  
the frequency range in which our ears are most sensitive.

As the capacitors age, the crossover point drops (not good for the  
horn) and they develop more internal resistance, which protects the  
horn slightly from the lower crossover point but isn't in general  
good for the sound. Putting the crossover back like it was designed  
raises the crossover point to where it should be and lets the woofer  
handle more of the midrange, which it's much better at handling than  
the horn.

DAA

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