-=> Quoting Bonnie Goodwin to Cameron Hall <=-
Hi Bonnie,
 BG> Seems to be the case. I used 130dB, because that was the level of
 BG> clipping at the sound console of the last large church system I
And in most cases, I'd also suspect that knowing a church usage, it
would get plenty loud and not clip so damage to speakers is minimal
before someone hits a fader to tone it down to kill any feedback. :-)
 BG> designed, which is about 20 dB above the loudest that sound system
 BG> would ever be run on an average, giving sufficient headroom before
 BG> clipping. 
It's amazing how easy it is to destroy speakers with underpowered
amplification. :-)  I wondered where you shelved the low end to
protect against subsonic mic handling effects.
 BG> Can you imagine that 162dB car on the street during a cruise? You
I think with prudent adjustment, an enjoyable listening experience can
be had, but the intimacy of the vehicle environment precludes exact
localization of the sound image for all passengers, and can only be
optimized for one central location.  I can understand headroom for clean
peaks, which takes out or reduces the fatigue of listening, but a
balanced response in the long run means less impact on conversation and
ear response deadening to certain sound spectrum ranges.
 BG> equipment.. The EQ curves are all "disco" curve smiley faces.. lots of
This all depends on the response curves of the speakers.  The flatter a
speaker is, the better I like it, and the less EQ required, and,
amazingly, less power too.  Lower cost EQ tends to cause spectral
time delay, and the delay is most noticeable on snare (then properly
recorded) drum and other percussive instruments.  Having been behind a
drum kit, ya get a feeling for these things.  This was my biggest
complaint with many CD transfers earlier on when comparing the vinyl to
the CD.  Yes, the cd was silent, yes it didn't have the vinyl
distortions, ie inner groove distortion etc, but the snare sound so
wrong on them.  It was found that some were taken from EQ'd masters
meant for vinyl release, but were not RIAA corrected or time delay
corrected either.
 BG> sizzle from the top, and lots of boom, and nothing else. Usually at
Funny you should mention that.  I was at a dance many moons ago, and the
entity behind the 'tables did the EQ from BEHIND the 'tables.  Never
listened in front!  The treble must have been +30db at 8Khz!  Everyone
was dancing at the far end of the hall up against the wall!  I walked to
his position and realized what REALLY took place and saw the EQ smiley!
I, like a lot of others, asked him (it ) to turn down the treble. 
Fat chance... :-(
 BG> That's why I have a hard time taking anything about auto sound
 BG> seriously. 
I've wondered off the car thread as I saw other parallels in audio.  The
vehicle can produce "nice music" but I'd forget it as a medium for
determining exact instrument localization and a flat frequency response
from 16hz to 30Khz. :-)
See ya, Cameron Hall
cameron.hall@bluebeam.gryn.org | ad121@freenet.hamilton.on.ca
Blue Beam BBS | 905 662 5784 | Stoney Creek Ontario Canada | v34 vFC FAX
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