d&b D12 Hardware - Manual (Page 7)

3. D12 Amplifier
3.1. D12 based systems
Fig. 2: D12 Amplifier
The d&b D12 amplifier is a two channel power amplifier that
incorporates digital signal processors (DSP) providing loudspeaker
specific controller functions. It is designed for use with all current d&b
loudspeakers, and a linear mode is available.
The D12 is designed with both digital and analog signal inputs,
loudspeaker outputs, and has remote control and monitoring
capabilities.
The switch mode power supply will function with a variety of mains
voltages and allows less weight at high output power.
The level control on the front panel incorporates a digital rotary
encoder, which enables selection of all operating modes in conjunction
with a Liquid Crystal Display (LCD). The D12 includes complete signal
processing, all necessary protection circuits, REMOTE and SERVICE
interfaces, all connectors and status indicators.
The D12 is housed in a 19" x 353 mm (13.9") 3 rack unit enclosure
made from stainless steel with an extruded aluminium front panel.
3.2. D12 block diagram
Output
routing
Power
amplifier
Input
routing
Analog A
Analog B
Digital A
Digital B
Signal
generator
sine wave or
pink noise for
acoustic tests
Input
monitoring
User
EQ
Delay
t
Dynamics
Coil temp.
t°
Power supply
Information
on headroom,
temperature,
power, mains
voltage
Excursion
1/2
3/4
5
from / to channel A Channel B
1/2
3/4
5
System
EQ/XO
pilot signals
for load
monitoring
Channel A
LC Display
Output
Ch A
Ch B
Link A>B Dual channel
> LINEAR
off
D12
remote
interface
Output
routing
uC
> LINEAR
Z analysis:
load
monitoring,
wiring fault
detection
1/2
3/4
5
I
Fig. 3: D12 Amplifier block diagram
D12 Amplifier, Hardware manual (4.9 EN) Page 7 of 28