DB Audio B22-SUB, Руководство пользователя

Страница: 5 / 11

2.1 Product description
The B22-SUB is an actively driven subwoofer housing a pair of 18"
long excursion neodymium LF drivers built into a bandpass horn
cabinet. Its frequency response extends from 32 Hz to 90 Hz.
The cabinet is constructed from marine plywood and has an impact
resistant paint finish. The front of the loudspeaker cabinet is
protected by a rigid metal grill backed by an acoustically
transparent foam. Each side panel incorporates four handles and
mounted on the rear panel are four heavy duty wheels. The
enclosure features two runners recessed in the bottom panel to
protect the bottom panel from scratching. Two correspondingly
shaped recesses are incorporated into the top panel of each
B22-SUB cabinet to accept these runners, preventing cabinet
movement when stacked.
2.2 Connections
The cabinet is fitted with NLT4 F/M connectors. All four pins of
both connectors are wired in parallel. The B22-SUB uses the pin
assignments 2+/2–. Pins 1+/1– are designated to TOP cabinets.
In Mix TOP/SUB mode, when one connector is used as the input,
the second connector allows for direct connection (link) to a TOP
cabinet.
Note: Only one B22-SUB may be connected. The second
connector socket must not be used to link another B22-SUB
cabinet.
The cabinet can be supplied with EP5 connectors as an option.
Pin equivalents of the connector options are listed in the table
below.
NLT4 F/M
1+ 1– 2+ 2– n.a.
EP5 1 2 3 4 5 (SenseDrive)
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 only available at the output B
connector.
d&b LoadMatch
Starting with the D80 amplifier platform, the LoadMatch function
enables the amplifier to electrically compensate for the properties
of the loudspeaker cable used without the need for an additional
sense wire. For applicable loudspeakers, LoadMatch is therefore
independent of the connector type used.
NLT4 F/M and EP5 connector wiring
2 B22-SUB loudspeaker
d&b B22-SUB Manual 1.2 en 5