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BX30 Owner’s Manual
13
BX30 Technical description
System topology
The BX30 is fully active with a sophisticated signal management system. The following features are provided as
standard.
Dual inputs and outputs fully balanced with automatic bypass in the event of power loss. The outputs are buffered and
filtered with a 24 dB/ octave high pass network which forms a perfect 24
th
order crossover (Linkwitz-Riley) when the
BX30 is set at 95 Hz Low Pass mode. A direct through switch is also provided for multiple BX30 linking.
•
All inputs and outputs are relay switched for full protection of system. There is a voltage protection limiter on each
input to protect the balanced line level amplifiers.
•
A full logic management and protection system controls all switching functions with LED indication of fault
conditions.
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Switchable –10 dB, +4 dB or mute gain with level control.
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Three precision low pass networks, calibrated to meet international standards;
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80 Hz for critical listening applications using high quality small monitors.
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95 Hz for most subwoofer applications in stereo or part of a multi channel system.
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120 Hz for full 5.1 systems requiring a separate low frequency effects channel. This mode is designed to meet
Dolby, DTS and THX criteria for theatres.
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Additionally there is an internal spectrum equaliser and subsonic filter (17 Hz) to ensure optimum sensitivity and
maximum output from 20 Hz to the cut off frequency.
•
Full 360 degrees of phase adjustment allows room positioning and alignment for optimum summing with a main or
satellite speaker. This promotes mutual coupling of multi speaker systems for perfectly solid imaging.
•
VCA controlled power limiting ensures overload conditions cannot occur. Driver protection is achieved without
compression and misleading changes in the sound spectrum. A relay offers instant protection of the driver in a
condition of fault or overload.
We believe the BX30 is the most advanced low frequency speaker system available. It can work alone or as part of a
larger modular system.
The 140 W power module is an extremely efficient unit with virtually no quiescent current. The unit can be operated
indefinitely in standby mode. Distortion is negligible under normal operating conditions.