Martin Audio – MA2.8s Amplifier
ENGLISH
12
7 C O N NE C T I O N S
7 .1 I n p u t c o n n e c t i o n s
7.1.1 B alan ce d inp u ts
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 G RO UN D/S HIEL D
P IN 2 H OT (+)
P IN 3 C OL D (-)
XL R in p ut co nn ecto r
XL R ba l an ce d
W ithin the N eu trik® C om bo ja ck th e re is a _ ”(6 .3 mm ) p ho ne ja ck, w hich is w ire d in pa ra lle l with th e X LR .
T IP H OT
R IN G C OL D
S LE EV E S HIEL D/G RO UN D
TR S pl u g
Must be grounded XLR Pin 1 Scrn Sleeve 2 Pos Tip 3 Neg Ring 1/4“
CH. B
CH . A
INPUT
INPUT
CH.A LINKCH.B LINK
GAI N41dB38dB35dB3 2dB29dB2 6dB2 3dB2 0dB678123
GAIN
CH.B
GAIN
CH . A
LINK / BRIDGE A+ B
ONOFFCurrent consumption: 5.2A
230-240V 50 -60Hz
Pa t ent s SE 9EP 0US 5
STEREO
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 n n 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
si gn 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 .
T o da is y c ha in am plifiers , use the XL R-m ale conn ector, labe le d L in k, provided o n e ach chan nel. It is co nne cte d in
pa ra lle l w ith the Ne utrik® C om bo jack on each inp ut.
7.1.2 U nb alan c ed in pu ts
T o co nn e ct a n u nb ala nced so urce , tie pin 3 (ring on T RS ja ck) d ow n to th e shield o f the con n ecto r. If yo u le a ve o ne
p in d iscon ne cte d, yo u will lo se 6 dB .
A b ette r m eth od for usin g u nb ala nced so urce s is sho wn b e lo w. Th is is sim ila r to th e con ne ction fo r ba la n ce d lin es, b ut
p in 3 is con n ecte d to th e shield a t the sou rce . T he h um an d n oise re je ction for th e cab le is e qu iva l e n t t o th at for a
b alan ce d lin e . To m inimize hu m in th e a ud io , u se ba la nce d in p uts wh e ne ve r p ossib le .
All material © 2007. Martin Audio Ltd. Subject to change without notice.
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