L-Acoustics dV-DOSC, Operator'S Manual

Page: 42 / 150

dV-DOSC dV-SUB Manual V3.0 June 2005
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1.9 dV-DOSC AMPLIFIER RACKS
Figure 28: L-ACOUSTICS AMP RACK RK12-4
The L-ACOUSTICS RK12U amplifier rack is 12 rack units high and can be loaded with up to four L-
ACOUSTICS LA24a or LA48a amplifiers. 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 LA24a or 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 four 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. Alternatively, SUB(A), SUB(B), 2W(A), 2W(B), 2W STEREO,
3W(A) or 3W(B) COMB connectors can be used. Essentially, 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 (4 x LA48a plus PADO4a) the RK124a
rack can power up to 12 x dV-DOSC, 8 x SB218 or dV-SUB subwoofers or 16 x SB118 subwoofers.
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.
Transparent (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 and 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. Various RK12U packaging options are shown in Fig. 29.