Martin Audio MA900 handleiding

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Handleiding

Martin Audio – MA900 Amplifier

ENGLISH

7 . F an g rille filters

A g rille w ith foa m filte rs is lo ca te d o n th e fro n t pa ne l to p re ve nt du st from e n te rin g th e a mp lifie r. T h e grille is re mo vab le

for e asy cle a ning o f the filter by simp ly p u llin g the m o ff. T p5-he foa m filter sho u ld a lwa ys b e u se d .

8 . Ca rry/p ro tection ha nd le

Both handles can be used to carry the amplifier; they also act as protection for the front panel. In fixed installations

or where rack front covers are too shallow, they may be removed by unscrewing the retaining bolts behind the front

panel.

4.3 Rear Panel

230-240V 50-60Hz

Cu rrent consumption: 5.5A

STEREO

fOf

13 45678 5 4 1

678

123

+ -

Gnd

CH.B INPUT

Made in the EEC by

MARTIN AUDIO MA 90 0

OUTPUT CH.B

CH. B INPUT

XLR

Pi n 1 Sc rn Sl eev e

2 Pos Tip

3 Neg Ring

1/4"

Ser. N o:

OUTPUT CH. A

Must be grounded

Clip Limi ter A

1 + CH.B +

1 - CH.B -

Clip Limi ter B

Off

GA IN

41dB

38dB

35dB

32dB

29dB

26dB

23dB

20dB

+ - Gnd

CH. A INPUT

CH.A INPUTGAI N

CH.B

GAI N

CH . A

LINK/BRIDGE A +B

OFF

STEREO

1+ CH.A+

1- CH.A-

2+ CH.B+

2- CH.B-

BRIDGE

Pi n 1 + S p k+

2 - Spk-

1. Output / Speaker connector

T p5-he N eu trik S pe akon co nn e ctor is u se d o n th e o utp uts of th e a mp lifie r. A fu ll d e scrip tion is fou n d in th e op e ra tion

section . (Se e p ag e 1 1).

3. Clip limiter switch

Turns the clip limiter “ON” (switch IN position) or “OFF” (switch OUT position). (See page 13).

4. Input signal XLR.

The Neutrik Combo jack is used which also features a _” TRS phone jacks. (Pin 2 is “hot”, see page 10).

5. Link / Input. A 'Phoenix' screw terminal connector, connected in parallel to the female XLR input is provided for

hard wiring the input, or linking to another input.

6. Gain switch channel B. Three of the switches in the DIP-switch (1,2,3) select the gain of the channel to be either

20, 23, 26, 29, 32, 36, 39 or 41 dB. (See page 5).

7. Link and Polarity reverse switch. The two middle switches in the DIP-switch are used for Link and / or Bridge

operation. (See page 6).

8. Gain switch channel A. Three of the switches in the DIP-switch (6,7,8) select the gain of the channel to be either

20, 23, 26, 29, 32, 36, 39 or 41 dB. (See page 5).

9. AC Mains cable. WARNING!

A label just below the mains cable on the rear of the amplifier indicates the selected AC mains operating

voltage. Connect the mains cable only to the AC source referred to on the label.

5 REAR PANEL FEATURES

5.1 Gain switch

T p5-he g ain switch loca te d o n th e rea r p an el (the ce ntra l D IP -sw itch ) cha ng e s th e inp ut se nsitivity of the am plifier. T his

can b e u se fu l w he n u sing lo w or high no mina l inp u t sign a ls. Mo st p rofessio na l m ixin g con so les o p erate a t a level o f

+ 4 to + 6 d Bu ; th e re fo re th e 3 2d B-g ain po sitio n e nsure s th e re is p le nty o f fa d er m o ve me nt availab l e . F o r a s e m i

p ro fe ssion al mixing de sk op erating a t a n om ina l level o f 0 dB u o r -1 0 dB th e high e r ga in se tting s o f th e a mp lifie r ca n b e

u se d.

CONTENTS

GUIDES

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