TS> cars creeping into the discussion of rooms and 
 TS> venues.  +5/-20 wouldn't
 TS> be anything abnormal for overall response over 
 TS> space and time in some
 EF> Wow... a 25dB spread! Wouldn't that just sound HORRIBLE?
Yes, but not unusual.  I'm sure you've noticed what some idiots do with 
consumer Eq's with +/- 12 or 15 dB ranges.  Some wannabe pseudo-pros too.  
 EF> how low and how high sound will be reproduced. That is to say that a
 EF> +/-3dB 20-20K will most probably be a 40-16K +/-1dB. 
 TS> Not through speakers at more than one spot in an untreated room.  
 EF> No, acoustics is another thing! I taking pure components specs. The same
 EF> speaker could have BOTH thoses specs listed, but 40-16 +/- 1dB is a lot
 EF> more precise and less misleading than 20-20K +/-3dB!!
Few speakers really approach those specs over their coverage patterns and in 
real space.  High end electronics you might spec tighter.  Pro tape specs 
should be better than that, while consumer ones (including corssover) might 
spec at -20 cutoff.  
 TS> louder.  Know any jerks
 TS> who pretend they like loud sound who'd like to compare?  (My example
 TS> should yield around 165 dBspl, while NASA spec's 
 TS> instrumentation mics
 TS> capable of 180 dB max from B&K.)   
 EF> I try not to hang out with such people!
But the B&K reps can have good stories.  They try to make accurate underwater 
transducers, ones with several hundred Khz high end, ones with unlistenable 
amplitude capacity that don't distort, as well as normal audio mics.  
 TS> 15-130 dBspl would be ideal IMHO.  Occasionally I've even been in a
 EF> I would deal with 40-120 quite perfectly in most cases!
Most transducers distort enough at the high outputs so that I'd rather be 
able to run them conservatively.  You do want to be able to handle a 
realistic cannon blast, alternately with gentle music, don't you?    
 TS> room that approaches that lower limit.  
 TS> Unfortunately, I've been known
 EF> Really?! And where would that be?
Sonalysts sound stage in Waterford, CT beats the Universal Studios noise 
floor.  (It's also able to offer military secure facilities, SGI paint boxes, 
sound track composition, etc.).  Also, one studio I built if you turned off 
the mechanicals.  
 TS> Derby, about 10 miles from New Haven.  
 EF> Just curious, I have a friend who lives in Manchester!
That's where I was born, and where my dad grew up.  
Terry
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