HomeMy WebLinkAboutGMF SOUND INC. 06-16-80GMF sounD, INC,
P.O. BOX 5373
ORANGE, CA 92667
SOUND SYSTEM ENGINEERING- SALES-SERVICE
(714) 997- 5645
June 16, 1980
City of Tustin
300 Centennial Way
Tustin, Calif., 92680
Attn: City Council
Dear Sirs:
We have just completed servicing the sound system for your Council Chamber
on friday June 13, 1980. The nature of services performed, our findings,
and recommendations for updating the existing sound system are here in
contained. The system as originally designed and installed was of the
highest industry standards at the time of pt~rchase. In the past five
years many technological ~dvancements in electronics have been m~de
available which enhance ease of operating and reliability. All as
recommended here shall be of the latest proven reliable design and
shall be installed according to industry standard to interface with
existing equipment.
The failure of the sound system was directly related to the equalizer
Altec model 9860. The function of this piece of electronic equipment is
to tune the system to fit the acoustic environment of the room. When
properly tuned it will increase gain by decreasing the squeal of feedback
and creating a more realistic sound rather than the typical artificial
sound of an audio reinforcement system. The Altec 9860 was one of the
first of its kind and is no longer manufactured due to such failures.
As you listen to the sound system now you hear a hissing sound. Most
of this is from the equalizer and ~here is no guarantee how long it will
be before another failure. I recommend replacing it with a current model
of reliable design.
The switching matrix used to activate microphones and adjust levels was
checked, adjusted, and transient noise associated with the switches
eliminated as much as possible. There is now available a total automatic
microphone mixing system which would eliminate the switches and level
control currently employed. When any microphone is spoken into the
system is automatically activated, the microphone turned on, and level
is adjusted to a point of maximum gain before feedback. As additional
microphones are spoken into simultaniously the prodcedure is automatically
repeated always adjusting level to maximum without feedback. Once
properly installed no adjustment or operator is required. This would
eliminate all existing microphone~ switches, level controls, and associated
equipment from the council chambers. The pops, squeals, and possiblity
of failure of the aging relay matrix would be eliminated. I recommend
automatic microphone mixing for any council chambers as the only way to
properly control a large number of microphones.
The followiD~ electronic equipment is recommend to meet the require-
ments as herein called for:
1 ea. INDUSTRIAL RESEARCH PRODUCTS 4013
12 CHANNEL AUTOMATIC MICROPHONE MIXER
1 ea. WHITE INSTRUMENTS 4003
EQUALIZER FILTER SET
GMF SOUND, Inc. will design, inst~lled, test, and tune all as here in
specified for (plus tax on material):
INDUSTRIAL RESEARCH PRODUCTS 401 3 ...... $2,397.00
WHITE INSTRUMENTS 4003 .................. $ 928.80
LABOR TO INSTALL ........................ $ 425.00
$3,750.80
This price quote is firm for 30 days from above date.
Installation can begin within 30 days from receipt of authorized purchase
order.
GMF guarantees all new products installed in this system to be free from
defective material and workmanship for a period of one (1) year after
acceptance or first beneficial use, whichever is earlier. GMF will
replace defective parts and repair malfunctioning products under this
warranty when the defect occurs under conditions of normal inst~llation
and useage. The warranty does not extend to any component which has
been subject to misuse, neglect, or improper useage.
If you or any of yottr associates have any further questions,please
contact me at your ear, est convenience.
Sincerely,
Mark A. Dundas
Audio Engineer
MAD:ab
enclosure