User's Manual

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Sub15 Manual / English
All ADAM products are designed and manufactured to the highest quality standards.
However, if any problems with your subwoofer occur, we recommend proceeding as
follows:
6.1 Problem: The LED shows normal operation (green) but there is either no or only
a distorted audio signal.
Check the volumes of both the subwoofer and your signal source.
Check the wiring. Is the cable defective? Are all cables connected correctly? If pos-
sible, check with new cables.
Connect the subwoofer as directly to the signal source as possible (please mind
the volume!). Is another part of the signal path (e.g. mixer, audio source) defective?
6.2 Problem: You hear parasitic noises (like humming, buzzing, soughing,
cracking).
Please disconnect the signal cables. If the noises disappear, check the signal path.
Make sure that all cables are properly connected, especially the signal cable
between the preamp/mixing console/etc. and the sub.
If the noises can still be heard, check for other electrical devices close to the
speakers (mobile phones, switching power supplies, etc.). If there is no interfering
device the subwoofer will probably cause the problem.
6. Troubleshooting
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5.2 Controls on the rear panel (continued)
c) Sub Level
In the 0dB position the signal will be passed on 1:1
to the internal amplifier. The Input Sensitivity of the
subwoofer can be adjusted from -60dB to +6dB and
thus allows for a wide volume levelling range.
d) Sub Filter
The upper frequency limit of the unit is variable and can be set to any value
between 50 and 150Hz. The 85Hz marker indicates the recommendation
of Dolby® labs for surround sound settings. In practice a slightly lower
crossover frequency delivers tighter bass response. For typical near-
midfield monitors we recommend 70 to 75Hz as the upper limit.
Please note: These settings do not have an absolute character, as different
satellites and different room acoustics lead to results that cannot be
predicted.
5. Controls