d&b audiotechnik B4-SUB Handbuch - Seite 4
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Fig. 1: Cardioid dispersion pattern
B4-SUB,
B4-SUB
The B4-SUB is a compact high performance cardioid subwoofer for use
with d&b E-Series and T-Series loudspeakers.
The B4-SUB houses two long excursion neodymium drivers in an
integrated cardioid setup: a 15" driver in a bass-reflex design facing to
the front and a 12" driver in a 2-chamber bandpass design radiating to
the rear. The arrangement and tuning provide a cardioid dispersion
pattern using a single amplifier channel.
Its frequency response extends from 40 Hz to 150/100 Hz.
The B4-SUB cabinet is constructed from marine plywood and has an
impact and weather resistant black paint finish. The front of the cabinet
is protected by a rigid metal grill in front of an acoustically transparent
foam. At the top and bottom the cabinet front is fitted with catches for
securing an optional transport lid E7922. The cabinet incorporates a
pair of handles, and mounted on the rear panel are two EP5 or NL4
connectors and four heavy duty wheels. An M20 threaded flange in the
top panel accepts the d&b Z5013 Loudspeaker stand for the
deployment of d&b E-Series or T-Series cabinets.
Two plastics runners prevent cabinet movement and protect the bottom
panel against scratching. Correspondingly shaped recesses in the top
panel of each cabinet prevent cabinet movement when stacking B4-
SUBs.
NOTICE:
Only operate B4-SUB loudspeakers with a correctly configured d&b
amplifier, otherwise there is a risk of damaging the loudspeaker
components.
Cardioid dispersion
Cardioid dispersion avoids unwanted energy behind the system and
greatly reduces the reverberant field at low frequencies providing
highest accuracy in low frequency reproduction. B4 subwoofers can be
used as stand-alone solutions or in stacked combinations with a
minimum distance of 60 cm (2 ft) between adjacent cabinets or between
the cabinets and a side wall. When set up in front of walls, the minimum
distance from the rear panel of the cabinet to the wall is provided by
the wheels on the cabinet back.
B4-SUB cabinet options
The special color (SC) version of the cabinet is available in all colors of
the RAL color table. The connector type is NL4.
(1.1 EN)
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