Autotek A690RX User Instructions page 2

POWER RATING
The AUTOTEK A690RX subwoofer enclosures are desig-
ned for high bass levels. Anyhow it is possible, that unsa-
tisfying sound characteristics could be caused by too low
or too high amplifier power. In certain circumstances this
even can cause a damage to the loudspeakers.
It is recommended to choose rather a more powerful am-
plifier (ca. 15-20% more Watts RMS than the max. RMS
power rating of the woofer) and to use the amplifier not
at the maximum output level (low distortion factor, good
sound characteristics). A weaker amplifier at the maximum
level causes worse sound characteristics due to the high-
er distortion factor.
Never crank up the output volume of your amplifier to the
maximum level or run the amplifier into the clipping range.
If the sound is distorted and not clean, turn back the level
until the distortions disappear.
Please note the following recommended power ratings:
A690RX: One Amplifier with approx. 160 to 250 Watts
RMS @ 4 Ohms.
The AUTOTEK A690RX subwoofer enclosures have no
integrated limiter or clipper, which is limiting the level up-
wards. Overamplified bass peaks leads inevitably to a
burn out of the voice coil of the woofer. A burn out of the
voice coil, caused by clipping/overamping is not covered
by the usual warranty
IMPORTANT NOTES
Choose a suitable location for your soundsystem, that
neither the driver's field of vision nor the security of the
inmates will be affected. This stands also for airbag-zo-
nes and safety belts. The permanent temperature of the
location should not be lower than 5°C and not higher than
50°C. Protect the device from moisture and humidity.
Ensure that your subwoofer enclosure will not get loose
during the drive and hurt someone in the passenger cabin.
It is recommended, that you mount the subwoofer enclo-
sure with suitable belts or any other mounting solutions in
the trunk area.
Please ensure not to damage any serial components of
your vehicle (airbags, wires, gastank etc.) during the ins-
tallation of your soundsystem by drilling or any other ope-
rations.
USER INSTRUCTIONS
Never screw or mount any other devices (amps, caps etc.)
onto the subwoofer enclosure, this may cause damage to
the electricity.
For your personal concerns you should choose a approp-
riate sound level for the subwoofer enclosure, that neither
the roadworthy of the driver nor his concentration will be
disturbed, that he is able to notice possible traffic noises
and acoustical warning signals.
Modern car audio soundsystems provide very high acou-
stic pressure beyond the 100 dB mark. Please observe in
this case, that permanent use of high sound levels may
cause damage to your ability of hearing.
Please ensure by any means the correct polarity of all con-
nections. Faulty installed and connected devices may get
damage the vehicle and the device permanently.
Please check in any case the operation guide or wiring
manual of your amplifier which you'd like to use for the
soundsystem.
Never connect the speaker terminals with the 12 Volt pow-
er supply, otherwise the speakers may get damaged.
Audio Design GmbH
Am Breilingsweg 3 · D-76709 Kronau/Germany
Tel. +49 7253 - 9465-0 · Fax +49 7253 - 946510
www.audiodesign.de • www.crunchaudio.de
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