a/d/s/ 641is - Manual (Page 5)

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Study your automobile thoroughly before you drill or cut any holes. Take extra care when working near
gas tanks, gas lines, brake or hydraulic lines and electrical wiring.
Wear eye and ear protection when using power tools.
Keep the woofers and tweeters away from metal filings and shavings. Once foreign objects are stuck to
the magnets or tweeter dome, it will be virtually impossible to remove them. Keep the tweeters in their
protective bags until final mounting to prevent any possibility of metal dust or chips from passing
through the grille and accumulating on the dome.
Exercise caution when working with the 6-series with the grille removed. A slip of the hand with a screw-
driver or other tool can result in irreparable damage to the cone or dome. Do not touch the cone or
dome.
Do not install the components where they will be subject to excessive heat, moisture or dust; or where
they will be kicked or repeatedly bumped or brushed.
Make absolutely sure that the woofer is connected to the lowpass output and the tweeter is connected
to the highpass output of the crossover network. If these connections are reversed, low-frequency sig-
nals will be fed to the tweeter without fuse protection. In this case, the tweeter may be damaged. Such
damage is not covered by the warranty.
When removing or installing the grille on the 6-series, be careful not to brush the woofer’s rubber sur-
round or the tweeter’s dome with the edge of the grille. Cutting or tearing the surround or dome will
destroy the unit.
Never run wires outside or beneath the vehicle where they can be snagged by road hazards or the mov-
ing parts of the vehicle. Use existing wire channels, sills, panels and molding strips inside the automobile
to hide the wiring for neat appearance and safety.
Make sure your radio/cassette/cd player and or other equipment is turned off while connecting the 6-
series speaker terminals. Turn on the various components and slowly advance the volume control only
after checking and double checking all connections
Note: if sound is weak or distorted, immediately turn down the volume and see the section entitled trou-
bleshooting.
system planning
Proper system planning is the best way to maximize performance. By planning your installation careful-
ly you can avoid situations where the performance or reliability of your system is compromised. Your
authorized a/d/s/ dealer has been trained to know how to maximize your systems sonic potential. They
are a valuable resource in helping you with your system design and installation.
pecifications
system
uency response +/-3dB: 40Hz to 22kHz
tivity 2.83 volt 1m: 91dB
dance, nominal: 4 Ohms
mmended amplifier power watts RMS: 20 to150 watts per channel
nsions – woofer/midrange transducer mid-range woofer
nting depth (woofer): 2 3/8” / 60mm 2 7/16” / 63mm
all height: 2 11/16” / 69mm 2 15/16” / 79mm
all maximum diameter: 6” / 152mm 6 1/2” / 165mm
mum height above panel without grille: 1/2” / 13mm 5/8” / 16mm
mum height above panel with grille: 3/4” / 20mm 15/16” / 24mm
mum grille diameter: 6 1/2” / 166mm 7 1/8” / 181mm
ut size: 4 5/8” /118mm 4 15/16” / 125mm
nsions – tweeter transducer
dard mount height: 1 1/4” / 32mm 1 1/4” / 32mm
mount cutout diameter: 1 7/8” / 48mm 1 7/8” / 48mm
mount depth: 1” / 26mm 1” / 26mm
nsions – crossover network
h/width/height:
101/16” x 3 1/2” x 1 5/8” 259mm x 89mm x 42mm
over points: low to mid 200Hz Mid to tweeter 2.2k
e-Small specifications
air resonance (Fs): 57.2Hz 57.1Hz
rical damping (Qes): .34 .47
hanical damping (Qms): 4.87 6.00
damping (Qt): .32 .44
valent volume of compliance (Vas) cubic feet / liters: 0.26 / 7.41 0.46 / 13.0
tive cone area (Sd) in2: 14.1 18.9
er to peak linear excursion (Xmax): .16” / 4.0mm .16” / 4.0mm
to peak excursion: 1/2” / 12.7mm 3/4” / 19.0mm
coil DC resistance (Re): 3.1 3.1
coil diameter: 1” / 25.4mm 1” / 25.4mm
coil length (winding length): .45” / 11.5mm .45” / 11.5mm
a/d/s/ subscribes to the philosophy of continuous product development therefore the specifications may change
without notice.
a/d/s/ tweeters are constructed in concert with the Fer rosound program and use Ferrofluid to provide increased
power handling, decreased distortion, minimum electrical impedance change, higher linearity, and smoother fr e-
quency response.