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CHAPTER 3: AMPLIFICATION AND AUDIO CONNECTORS
LINA's drivers are powered by a proprietary 3-channel, open-
loop, class D amplifier. The audio signal is processed with elec-
tronic crossover, and correction filters for flat phase and fre-
quency responses, and by driver protection circuitry. Each
channel has peak and rms limiters that prevent driver over-
excursion and regulate voice coil temperatures.
The LINA user panel (Figure 13) includes Input and Loop output
connectors for audio, Limit and On/Status LEDs, and RMS con-
nectors and controls (see Chapter 5, "RMS Remote Monitoring
System").
Figure 13: LINA User Panel
AUDIO CONNECTORS
LINA is available with XLR 5-pin (Figure 14) or 3-pin connec-
tors (Figure 15) for audio Input and audio Loop output. XLR 5-
pin connectors accommodate both balanced audio and RMS
signals.
Figure 14: XLR 5-Pin Audio Connectors, Input and Loop Output
Figure 15: XLR 3-Pin Audio Connectors, Input and Loop Output
Audio Input (XLR 3-Pin or 5-Pin Female)
The XLR 3-pin or 5-pin female Input connector accepts bal-
anced audio signals with an input impedance of 10 k
connector uses the following wiring scheme:
Ω to chassis and earth ground (ESD clamped)
Pin 1 — 1 k
•
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.
Ω . The
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