L-Acoustics V-DOSC, Operator'S Manual

Page: 43 / 158

L-ACOUSTICS V-DOSC Manual Version 4 6/29/2005 Page 43 of 158
1.8 V-DOSC AMPLIFIER RACKS
Figure 26: L-ACOUSTICS Amplifier Rack RK124a loaded with 4 x L-ACOUSTICS LA48a amplifiers
The L-ACOUSTICS amplifier rack RK12U is 12 rack units high and can be loaded with up to 4 L-
ACOUSTICS LA48a amplifiers and the PADO4a amp rack panel. Overall external dimensions are 77
cm high (including casters) x 61 cm wide x 58 cm deep (30.3 x 26.4 x 22.9 inches). Clearance from
the front rack rail to the front of the rack is 9.5 cm (3.7 in). Clearance from the rear rack rail to the
rear of the rack is 6 cm (2.4 in). The depth from front to rear rack rails is 42.5 cm (16.7 in) and the
depth from front rack rail to the rear support points for the LA48a amplifier is 39 cm (15.35 in). Due
to the switched mode power supply technology employed in the L-ACOUSTICS LA48a, the rack
weighs only 98 kg (216 lbs) when loaded with 4x LA48a amplifiers.
Using the COMB connectors located on the PADO4a amp panel, the rack can be configured so that A
and B channels are independent. Depending on how the rack is to be configured 2-WAY, 3-WAY or
SUB COMB connectors are selected. Essentially, the COMB connectors route the desired input lines
from the 19 pin CA-COM connector to the appropriate amplifier inputs for A and B channels,
respectively. Using separate COMB connectors for both channels, it is possible to assign the A
channels and B channels independently. When fully-loaded (with 4 x LA48a plus PADO4a) the RK124a
rack can power up to 6 x V-DOSC, 8 x SB218 subwoofers or 12 x dV-DOSC.
In terms of construction, the amplifier rack is made of a lightweight aluminum space frame with heavy
duty bracing, internal shock mounting, standard rack rails and provision for rear support of amplifiers.
Clear, polycarbonate (lexan) front and rear doors allow the user to quickly see how racks are
configured and can be conveniently stored inside the rack during use (note: for ventilation purposes,
front and rear doors must always be removed during operation). A high impact resistance
polyethylene cover provides protection for the rack during transport so that no external case is
required. Four recessed Aeroquip flytrack sections are mounted on both sides of the amplifier rack
for flown applications. Recesses in the top cover of the amplifier rack allows racks to be stacked on
top of each other with the casters still attached. It is also possible to remove the casters on one
amplifier rack, place it on top of a second amp rack and then mechanically bolt the two racks
together.
Overall the L-ACOUSTICS RK12U amplifier rack provides an extremely efficient package in terms of
power versus size and weight while at the same time maintaining flexibility for smaller scale and
distributed system applications.