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CHAPTER 3: AMPLIFICATION AND AUDIO CONNECTORS
The UPQ-D Series drivers are powered by a proprietary
2-channel, open-loop, class D amplifier. The audio signal is
processed with electronic crossover, correction filters for flat
phase and frequency responses, and by driver protection
circuitry. Each channel has peak and rms limiters that prevent
driver over-excursion and regulate voice coil temperatures.
The UPQ-D Series user panel (Figure 9) includes Input and Loop
output connectors for audio, Limit and Active LEDs, and RMS
connectors and controls (see Chapter 6, “RMS Remote
Monitoring System”).
AUDIO CONNECTORS
The UPQ-D Series loudspeakers are available with XLR 3-pin
(Figure 10) or 5-pin connectors (Figure 11) for audio Input and
audio Loop output. XLR 5-pin connectors accommodate both
balanced audio and RMS signals.
Audio Input (XLR 3-Pin or 5-Pin Female)
The XLR 3-pin or 5-pin female Input connector accepts
balanced audio signals with an input impedance of 10 k
Ω. The
connector uses the following wiring scheme:
• Pin 1 — 1 kΩ to chassis and earth ground (ESD clamped)
• Pin 2 — Signal (+)
• Pin 3 — Signal (–)
• Pin 4 — RMS (polarity insensitive)
• Pin 5 — RMS (polarity insensitive)
• Case — Earth (AC) ground and chassis
NOTE: Pins 4 and 5 (RMS) are included only with
XLR 5-pin connectors.
Figure 9: UPQ-D Series User Panel (3-pin XLR and optional RMS)
Figure 10: XLR 3-Pin Audio Connectors, Input and Loop Output
Figure 11: XLR 5-Pin Audio Connectors, Input and Loop Output
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