Version 1.2 January 2001
Users Manual
Dear Customer,
Welcome to the team of ULTRASTACK users, and thank you very much for expressing your confidence in
BEHRINGER products by purchasing the ULTRASTACK. Although it is really easy to hook up and operate
the BG412H, we'd like to give you a concise description of this excellent speaker and its features in the
following.
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The ULTRASTACK can produce extreme sound pressure levels. Please note that high SPLs
do not only result in listening fatigue but can also permanently impair your hearing.
s
Please mute the power amp before connecting the loudspeaker.
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Never change the ULTRASTACK settings while the speaker is being driven, cause this could
damage the power amp.
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Set the ULTRASTACK to MONO to drive the BG412H from a single power amp. In this case, the speaker's
impedance is 16 Ohms. When connecting the speaker to a tube power amp, please use the corresponding
connector on your amp or set the impedance selector switch to 16 Ohms. Use the ULTRASTACK's
INPUT jack to connect the speaker cable.
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Now connect BG412H and amplifier. Don't use guitar or similar cables, use speaker cables with a
minimum diameter of 2.5 mm². You need one cable for mono operation, and two cables for stereo.
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If you have two amplifiers or a stereo power amp, you can operate the BG412H in two-channel mode, by
setting the ULTRASTACK to STEREO. Now the speaker's impedance is 2 * 8 Ohms. To drive the BG412H
from a tube amp, please take care to use the amp's proper connector. Connect the left channel of the
power amp to LEFT, and the right channel to RIGHT.
Rear panel Wiring
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Never operate a tube power amp without a load connected to it. If the impedance of the
connected speaker fails to match the amplifier's impedance, only a fraction of the available
power will be delivered to the speaker, which could lead to overloading of the output
transformer. Please refer to the operating instructions accompanying your amplifier.
Specifications:
Speaker type:
4 Ohms, 100 Watts
Power rating (mono/stereo):
400 Watts / 2 * 200 Watts
Impedance (mono/stereo):
16 Ohms / 2 * 8 Ohms
Dimensions (W * H * D):
ca. 30 ¼" (770 mm)
* 32 ¼" (820 mm)
* 15" / 11 ½" (380 / 290 mm)
Weight:
47 kg
BEHRINGER is constantly striving to maintain the highest professional standards. As a result of these efforts, modifications may be made from time
to time to existing products without prior notice. Specifications and appearance may differ from those listed or illustrated.
ENGLISH
www.behringer.com
ULTRASTACK
®
BG412H
