D&B Q-SUB, Manual

Page: 5 / 8

CSA
front rear
Fig. 3: CSA Stack (Example)
CSA (Cardioid Subwoofer Array) is a method to combine three or a
multiple of three subwoofer cabinets to an array with exceptional
directivity at low frequencies. Please refer to d&b TI-330 (d&b code
D5330.E) which describes the set up in detail. Do not use this mode with
any other configuration of Q-SUB systems.
Driven in CSA mode a reversed cabinet will eliminate the energy
radiated to the rear of two front radiating Q-SUB cabinets (CSA not
selected). Please note that all other settings of the amplifiers driving a
CSA have to be identical (input signal, level, 100 Hz, EQ, delay).
Operation with E-PAC
Selecting Q-SUB mode (firmware V4.00 or later) enables the E-PAC to
drive a single Q-SUB cabinet. We do not recommend that two Q-SUB
cabinets are driven in LO IMP mode as the 6 dB reduction in input level
to the loudspeakers results in no gain in acoustical output.
The 100 Hz setting is available. The characteristics of the 100 Hz setting
is explained under the previous section "Operation with D12 -
Controller settings".
Technical specifications
Fig. 4: Q-SUB frequency response,
standard
and 100 Hz settings
Q-SUB system data
Frequency response (–5 dB standard)..................................................40 Hz ... 130 Hz
Frequency response (–5 dB 100 Hz mode).........................................40 Hz ... 100 Hz
Max. sound pressure (single cabinet, 1 m, free field) with D12 .....................133 dB
Max. sound pressure (single cabinet, 1 m, free field) with E-PAC .................129 dB
(SPLmax peak, pink noise test signal with crest factor of 4)
Input level (100 dB-SPL/1 m)................................................................................—13 dBu
Polarity to controller INPUT (XLR pin 2: + / 3: –)...................................................LF: +
Q-SUB subwoofer
Nominal impedance..................................................................................................8 ohms
Power handling capacity (RMS / peak 10 ms).........................................400/1600 W
Components...........................................................................................................18" driver
Connections..............................................................................2 x EP5 (optional 2 x NL4)
Pin assignments.............................................EP5: 3/4, SenseDrive pin 5 (NL4: 2+/2–)
Weight.............................................................................................................42 kg (92.6 lb)
580 [22.83"]
493
[19.40"
]
668 [26.30"]
773 [30.42"]
Fig. 5: Q-SUB cabinet dimensions in mm [inch]
Q-SUB Manual (2.1E) Page 5 of 8