Specifications

5.6 Input connections
Both inputs are balanced on 3 pin XLR type connectors and wired pin 2
hot, pin 3 cold, pin 1 ground/shield:
PIN 1 - SIG. GROUND/SHIELD
PIN 2 - HOT (+)
PIN 3 - COLD (-)
Figure 3. XLR input connector pin-out.
There are also TRS jacks for linking etc. They are wired as follows:
TIP - HOT (+)
RING - COLD (-)
SLEEVE - SHIELD/SIG. GROUND
Figure 4. TRS phone plug
The input impedance is sufficiently high (20kohms balanced) to allow
"daisy-chaining", or multiple parallel input connections. To daisy-chain, use
the TRS jacks provided on each channel. The input circuits also have high
enough headroom to accept the maximum output level from virtually any
low-level signal source.
Figure 5. Rear panel connectors
Martin Audio – MA4.2 Power Amplifier
ENGLISH
9
SIG.GND – +
INPUT
CH.B
CH.A
Normal Pol.B
Reverse Pol.B
Stereo
Link A+B
Gain 41 dB
Gain 32 dB
Mono Bridge
XLR 1/4"
Pin 1 Gnd Sleeve
2 Pos Tip
3 Neg Ring
Must be grounded
230V AC 40-440Hz
1
2
3
SIG. GND.
–
+
CONTENTS
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