d&b Bi6-SUB - Manual (Page 5)

2.1. Product description
The Bi6-SUB is an actively driven, compact, high performance
subwoofer.
The cabinet houses a long excursion 18" neodymium driver in a
bass-reflex design. The frequency response extends from 37 Hz to
140 Hz.
The enclosure is constructed from marine plywood with an impact
resistant black paint finish. The front of the cabinet is protected by
a rigid metal grill backed by an acoustically transparent foam.
Four rubber feet prevent cabinet movement and protect the bottom
panel against scratching. Correspondingly shaped recesses in the
top panel of the cabinet prevent cabinet movement when stacking
Bi6-SUBs.
The cabinet side panels are each equipped with a pair of M10
threads to accept the Z5389 Horizontal bracket.
2.2. Connections
The cabinet is fitted with a pair of NL4 M connectors and a two
pole screw terminal block (ST). All four pins of both NL4 M
connectors are wired in parallel. The cabinet uses the pin
assignments 2+/2–. Pins 1+/1– are designated to full range
cabinets.
Cabinets with the weather resistant option (WR) are equipped with
a fixed input cable (PG type, H07-RN-F, 2 x 2.5 mm
2 (AWG 13),
standard length 5.5 m (18 ft).
Pin equivalents of the applicable connector options are listed in the
table below.
NL4
M
1+ 1– 2+ 2–
ST n.a. n.a. + –
PG n.a. n.a. Brown (+) Blue (–)
d&b SenseDrive
The SenseDrive feature within D12 amplifiers enables electrical
compensation for the properties of the loudspeaker cable used.
SenseDrive requires an additional sense wire. SenseDrive is
therefore only available with EP5 connectors and 5-wire cabling
for applicable loudspeakers.
Note: When the D12 is operated in "Mix TOP/SUB mode",
the SenseDrive function is available on the output B connector
only.
In permanent installations SenseDrive can also be applied to
cabinets with NL4 connectors or fixed cable option (PG). The
connection of the negative signal wire (EP5 pin 4 of the respective
D12 output) to the SenseDrive wire (EP5 pin 5 of respective D12
output) is made in a breakout box close to the loudspeaker
cabinet. For an uncompromising SenseDrive performance the
connection should be done not more than 3 m (10 ft) away from
the loudspeaker.
Connector wiring
2. Bi6-SUB loudspeaker
d&b Bi6-SUB Manual 1.1 en 5