Connections; Input Connections; Balanced Inputs - Martin Audio MA4.2s User Manual

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CONTENTS
The heat power produced is the difference between the power consumption and output power:
1975 - 1534 = 441 watts for the amplifier.
8 Ohm
4 Ohm
2 Ohm
1/3 Power level = Average power with music as programme source. The amplifier driven to clip level
1/8 Power level = Normal operating power with music as programme source, 9dB headroom
7

CONNECTIONS

7.1

Input connections

7.1.1
X LR Inp u t co n ne ctors a re active ba la n ce d an d w ire d acco rding to the IEC 2 68 , tha t is pin 2 h ot, a nd wire d in th e
follo win g wa y:
P IN 1
P IN 2
P IN 3
XLR input connector
Within the Neutrik® Combojack there is a _"(6.3mm) phone jack, which is wired in parallel with the XLR.
T IP
R IN G
S LE EV E
Th e inp ut im ped ance is hig h eno ugh (20k oh ms ba lan ce d) to allow "d aisy-cha in ing ", or mu ltiple p ara llel inp ut
co nn ection s. Th e h ea dro om of th e inp ut circu its will also accep t the ma xim um ou tpu t level from virtu ally a ny lo w-level
sign al sou rce. Balan ced sign als are less sen sitive to A C h um an d rad io interference. Th e sou rce im pe dan ce sh ould b e
le ss th an 1k oh ms to avoid h igh freq uen cy lo sse s if lon g cab le run s are used .
To daisy chain amplifiers, use the XL R-m ale conn ector, labe le d Link, provided o n e ach chan nel. It is co nne cte d in
pa ra lle l w ith the Ne utrik Co mb o jack o n e ach inpu t.
All material © 2007. Martin Audio Ltd. Subject to change without notice.
PRINT
1/3 POWER 1/8 POWER
WATTS
363 250
442 325
817 490

Balanced inputs

G RO UN D/S HIEL D
H OT (+)
C OL D (-)
H O T
C OL D
S HIEL D/G RO UN D
Martin Audio – MA4.2s Amplifier
MA4.2s HEAT POWER
1/3 POWER 1/8 POWER
Kcal/hour
310 220
380 280
700 420
XLR balanced
_" TRS plug
12
1/3 POWER 1/8 POWER
BTU/hour
1240 850
1510 1110
2790 1670
GUIDES