Meyer Sound USM-1 Manual Do Utilizador
The S-1 Control
Electronics Unit
Electronics Unit
The USM-1 operates as a system with the
S-1 Control Electronics Unit (one per chan-
nel). A single-channel device operating at
line level, the S-1 is the final component in
the signal chain before the amplifier.
nel). A single-channel device operating at
line level, the S-1 is the final component in
the signal chain before the amplifier.
Optimized for the USM-1 loudspeaker
and pre-aligned at the factory, the S-1
contains frequency and phase response
alignment circuitry, and Meyer Sound’s
exclusive SpeakerSense
contains frequency and phase response
alignment circuitry, and Meyer Sound’s
exclusive SpeakerSense
™
driver protection
circuitry, incorporating both peak and RMS
signal limiting as well as excursion protec-
tion.
signal limiting as well as excursion protec-
tion.
SpeakerSense driver protection circuitry
protects the USM-1 loudspeaker compo-
nents from damage due to overheating or
excessive excursion under high power con-
ditions. This unique circuit continuously
monitors the power applied to the USM-1
drivers, and individually limits the high-
frequency and low-frequency outputs when
the safe operating limits of the drivers are
exceeded. Until the onset of overload, the
SpeakerSense circuitry has no effect on the
signal.
nents from damage due to overheating or
excessive excursion under high power con-
ditions. This unique circuit continuously
monitors the power applied to the USM-1
drivers, and individually limits the high-
frequency and low-frequency outputs when
the safe operating limits of the drivers are
exceeded. Until the onset of overload, the
SpeakerSense circuitry has no effect on the
signal.
The S-1 SpeakerSense circuit incorpo-
rates Meyer Sound’s new MultiSense™
function, which allows the use of multiple
function, which allows the use of multiple
power amplifiers having different channel
gains and/or power ratings. The S-1 accom-
modates two stereo power amplifiers, and
provides separate Sense inputs for each. Its
MultiSense circuit, which implements an
analog OR condition, automatically tracks
the power amplifier with the greatest out-
put voltage swing to control the system
protection limiters.
gains and/or power ratings. The S-1 accom-
modates two stereo power amplifiers, and
provides separate Sense inputs for each. Its
MultiSense circuit, which implements an
analog OR condition, automatically tracks
the power amplifier with the greatest out-
put voltage swing to control the system
protection limiters.
To enhance the effectiveness of the
USM-1 in stage monitoring applications,
the S-1 incorporates sliding filters which
band-limit the system response under full-
power conditions. This has the effect of dis-
criminating for vocal information in the
signal to increase clarity.
the S-1 incorporates sliding filters which
band-limit the system response under full-
power conditions. This has the effect of dis-
criminating for vocal information in the
signal to increase clarity.
Also provided is a switch-selectable Safe
function, which widens the safety margin of
the system and is intended to be used when
extended periods of overload are antici-
pated. The Safe switch and other setup con-
trols are located behind a cover plate on the
S-1 front panel, providing a means of se-
curing the system installer’s presets.
the system and is intended to be used when
extended periods of overload are antici-
pated. The Safe switch and other setup con-
trols are located behind a cover plate on the
S-1 front panel, providing a means of se-
curing the system installer’s presets.
UltraSeries™ S-1
Power
Sense
Limit
Safe
Adj
Lo Cut
Cal
VHF
Var
Safe
∞
20
10
8
4
3
2
1
0
Attn dB
5
6
-
Lo
Hi
VHF