Meyer Sound DS-2 - Manual (Page 3)

D-2 Control Electronics Unit
analog OR condition, automatically tracks
the power amplifier with the greatest out-
put voltage swing to control the system
protection limiters.
Also provided is a switch-defeatable
crossover (Mode switch) and line-level out-
put to drive subwoofer systems, with a sub
polarity switch to facilitate aligning the
subwoofers with the main system. The sub
switches and other setup controls are lo-
cated behind a cover plate on the D-2 front
panel, providing a means for securing the
system installer’s presets.
The DS-2 loudspeaker operates as a
system with the D-2 Control Electronics
Unit (one per channel). Optimized for the
DS-2 and pre-aligned at the factory, the D-2
contains active crossover networks, fre-
quency response and phase response align-
ment circuitry, and Meyer Sound’s exclu-
sive SpeakerSense™ driver protection
circuitry, incorporating peak and RMS
signal limiting as well as excursion protec-
tion. A single-channel device operating at
line level, the D-2 is intended to be the
final component in the signal chain before
the power amplifier.
The D-2 SpeakerSense circuitry protects
the DS-2 loudspeaker components from
damage due to overheating or excessive
excursion under high power conditions.
This unique circuit continuously monitors
the power applied to the DS-2 drivers, and
limits the signal output when the safe oper-
ating areas of the drivers are exceeded.
Until the onset of overload, the Speaker-
Sense circuitry has no effect on the signal.
The D-2 SpeakerSense circuit incorpo-
rates Meyer Sound’s new MultiSense™
function, which allows the use of multiple
power amplifiers having different channel
gains and/or power ratings. The D-2 accom-
modates up to four amplifiers, and provides
separate Sense inputs for each. Its
MultiSense circuit, which implements an
Input Loop
∞
20
10
8 6 5
4
3
2
1
0
Attn dB U l t r a S e r i e s ™ D - 2
Ex
RMS
Sense Limit
Power
DS-2 Only
Safe
Min Max
DS-2 Power
DS-2 & Sub 180
Polarity of
Sub Output
(to B-2A)
0 o
Mode
o
PUSH