Meyer Sound UPM-1 - Manual (Page 3)

The P-1A Control
Electronics Unit
The UPM-1 operates as a system
with the P-1A Control Electronics Unit.
Optimized for the UPM-1 and pre-aligned
at the factory, the P-1A contains frequency
response and phase response alignment
circuitry, and Meyer Sound’s exclusive
SpeakerSense
™ driver protection circuitry,
incorporating both peak and RMS signal
limiting.
SpeakerSense protects the UPM-1
loudspeaker components from damage due
to overheating under high power condi-
tions. This unique circuit continuously
monitors the power applied to the UPM-1
drivers, and limits the signal output when
the safe operating limits of the drivers are
exceeded. Until the onset of overload, the
SpeakerSense circuitry has no effect on the
signal.
Six stages of Meyer’s exclusive comple-
mentary phase equalization in the P-1A
Control Electronics Unit give the UPM-1
flat frequency response with outstanding
phase characteristics.
A single-channel device operating at line
level, the P-1A is the final component in
the signal chain before the amplifier.
UltraSeries™ P-1A
Power Sense Limit Flat ∞
20
10
8 4
3
2
1
0
Attn dB
5 6
Lo Cut