Detriot Audio Club Meeting September 18th

Archived from groups: rec.audio.car,rec.audio.tech (More info?)

SMWTMS is the Detroit Area's Audio Construction Society. Meetings occur on
the second or third Saturday of odd numbered months. There is a door charge
of $5. Meetings are announced in the club publication named, LC, The SMWTMS
Network.

For information on the club, visit the SMWTMS Web Site at:
http://provide.net/~djcarlst/smwtms.htm

For directions to this meeting send complete snail address with phone to
djcarlst@provide.net


177 TH SMWTMS MEETING DETAILS

DATE: Saturday September 18, 2004

TIME: 10 AM Until ?

FORMAL MEETING: 4 PM

COHOST: Eric Peterson

HOST: DLC Design, 47677 Avante Dr., Wixom MI 48393, (248) 305-5534

LECTURE: Jesse Spence, founder of Bully Subwoofers will present a talk
titled on loudspeaker driver design basics. He will cover subwoofers
midranges and tweeters. Basic physics, design choices, materials, causes of
distortion, and causes of frequency response fluctuations will be covered.
The viewpoint is from a loudspeaker driver designer's perspective. Tools
such as finite element analysis will be shown.

PROGRAM: AUTOSOUND CONTEST XXII: MARTIN MARTH AUTOSOUND PRIZE:

AUTOSOUND CONTEST JUDGING: Judging will be in the DLC Design East Bay. As
in recent years the contest the judge will be objective. Cars will be
judged solely on PTF (Perceptual Transfer Function) measurements. PTF
includes, tone balance frequency response, maximum SPL, maximum bass SPL,
and Spatial Rendition. A points system will produce the final score: 5
points Tonal Balance; 5 points Soundstage; 0.1 point/dB for SPL over 100
dB SPL @ 10 % distortion; 0.1 point/dB for 40 to 100 Hz average SPL over
100 dB @ 10 % distortion; 0.1 point per Hz for extension below 40 Hz (-6dB
from target). Prizes will be funded from the proceeds of the SMWTMS Martin
Marth Auction.

AUTOSOUND CONTEST RULES: The autosound contest rules are unchanged. The
rules are: 1) No charge for entering the autosound contest; 2)
Non-members must join SMWTMS for 2004 to enter the autosound contest; 3)
Frivolous entries may be rejected by the judges; 4) Time permitting,
tuning for best PTF score may be attempted. New this year is two prize
categories: maximum bass SPL; and best spectral balance.

AUTOSOUND TWEAKING: DLC Design autosound measurement equipment will be
available at 10:00 AM for any member who wishes to make measurements and
adjustments prior to the contest. Tuning will be in the West Bay of DLC
Design.

CALENDAR: DATE / PROGRAM / HOST

11/13/2004 Jazz Influences to Early Rock'n'Roll / ???
1/15/2005 ??? / Tom Nousaine
3/12/2005 Early Greenwich Village Folk Scene ???