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Pure-18S Passive 18" Subwoofer
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Always disconnect power from the mains, when system is not used. Only handle the power cord by
the plug. Never pull out the plug by tugging the power cord.
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Always operate the unit with the AC ground wire connected to the electrical system ground.
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Avoid flames and do not put close to flammable liquids or gases.
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Avoid ground loops! Always be sure to connect the power amps and the mixing console to the
same electrical circuit to ensure the same phase!
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Avoid installing your equipment very near radio or TV sets, mobile phones, etc., as these can cause
RF (radio frequency) interference.
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Avoid loud feedback from microphones. This can damage your speaker.
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Before changing your grounds around, always turn your amplifiers down.
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Do not connect this device to a dimmer pack.
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Do not drive the inputs with a signal level higher than required to drive the equipment to full output.
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Do not open this device. Risk: hazardous radiation exposure.
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Do not open the device and do not modify the device.
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Do not switch the system on and off in short intervals, as this would reduce the system's life.
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Extreme frequency boosts in connection with a high input signal level may lead to overdriving your
equipment. Should this occur, it is necessary to reduce the input signal level by using the INPUT
control.
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If device is dropped or struck, disconnect mains power supply immediately. Have a qualified
engineer inspect for safety before operating.
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If the system has been exposed to drastic temperature fluctuation (e.g. after transportation), do not
switch it on immediately. The arising condensation water might damage your system. Leave the
system switched off until it has reached room temperature.
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If your DAP Audio device fails to work properly, discontinue use immediately. Pack the unit securely
(preferably in the original packing material), and return it to your DAP Audio dealer for service.
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Make sure that the available voltage is not higher than stated on the rear panel.
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Make sure that the power cord is never crimped or damaged. Check the device and the power
cord from time to time.
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Make sure that the signals into the mixer are balanced, otherwise hum could be created.
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Make sure that there is sufficient room on all sides of the system for air circulation.
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Make sure you do not use the wrong kind of cables or defective cables.
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Make sure you use DI boxes to balance unbalanced signals; All incoming signals should be clear.
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Never let the power cord come into contact with other cables! Handle the power cord and all
connections with the mains with particular caution!
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Never remove warning or informative labels from the unit.
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Never modify, bend, mechanically strain, put pressure on, pull or heat up the power cord.
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Never use anything to cover the ground contact.
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Never use the device during thunderstorms, unplug the device immediately.
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Only use device indoors, avoid contact with water or other liquids.
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Prevent distortion! Make sure that all components connected to the Pure-18S have sufficient power
ratings. Otherwise distortion will be generated because the components are operated at their limits.
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Repairs, servicing and electric connection must be carried out by a qualified technician.
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The best way (even if not always feasible) to avoid ground loops is to connect the electric ground of
all the equipment to a single central point ("star" system). In this case, the central point can be the
mixer.
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To avoid or solve hum and buzzing troubles, try different combinations of lifting grounds on units that
are supplied with ground lift switches or make sure all chassis are connected to earth ground, either
through the A.C. power cord ground or by the front panel rack mount screws.
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To emphasize a frequency range, you do not necessarily have to move its respective slider upwards;
instead, try lowering surrounding frequency ranges. This way, you avoid causing the next piece of
equipment in your sound path to overdrive. You also preserve valuable dynamic reserve
("headroom").
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The user is responsible for correct positioning and operating of this product. The manufacturer will not
accept liability for damages caused by the misuse or incorrect installation of this device.
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When connecting the other parts of your sound system, watch out for the so-called "ground loops".
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Please read this manual carefully and keep it for future reference.
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WARRANTY: Till one year after date of purchase.
Order code: D3744
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