I came across this article and it set me thinking about older cabs and whether their tuning needs to be re-visited. Do LF Altecs significantly reduce their Fs over time?
Improvement of vintage audio over time
I came across this article and it set me thinking about older cabs and whether their tuning needs to be re-visited. Do LF Altecs significantly reduce their Fs over time?
Improvement of vintage audio over time
Opinion is only as valid as its verifiable supporting evidence.
Yes, users should check their woofers for drifting Ts parameters , as well as checking their enclosure for it's ( claimed ) tuning frequency ( assuming it's a vented box ) .Originally Posted by mah
Some pedantic clarification of terms ;
- The "tuning" of a BR ( vented ) enclosure won't change with age ( ie; the tuning frequency of a bass reflex cabinet = Helmholtz Resonator ) unless you make a physical change to box size or it's porting ( or the cabinet dries out & cracks open ) .
- No matter what transducer drives a "Bass Reflex" box ( assuming similar displacement of the driver ) the "tuning frequency" of that box won't change .
- OTOH, the Ts parameters of any transducer may change with usage & age ( & most will,, given enough use +/or age ) .
- Put any transducer ( with shifted Ts parameters ) into that unchanged BR box ( still tuned to it's original freq. ) and you'll get a different "system alignment" ( between those 2 constituent parts of the system) .
- So, ( system ) alignments are likely to change over time ( given an aging woofer ) but not the "box tuning" per se .
Last edited by Earl K; December 10th, 2012 at 02:06 PM.
Not sure if I've had enough coffee to venture into this, seems like a slight reduction in port size may be in order....if so would be easy enough to cover part of the port....GM would be better qualified than I to speak on this...
Your neighbors called. They like your music.
Yes it should not change the only other thing I can think of is if you add extra bracing to the cabinet which will change it's internal volume.But as Earl noted it should never change unless your cabinet changes in the form of (leaks,added bracing,port size,) etc...
"Drifting TS Parameters" sounds like a country music speaker building company.
Your neighbors called. They like your music.
Yes, I've heard of them. They're from Alnico Flatts, Tennessee (or was it Alnico Junction, Kentucky?)...."Drifting TS Parameters" sounds like a country music speaker building company.
Being of "Sound" Mind
Field Coil, Tennessee
Your neighbors called. They like your music.
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