Martin Audio MA2.8s User Manual
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CONTENTS
CONTENTS (ENGLISH)
1
2
3
3.1 EXPLANATION OF GRAPHICAL SYMBOLS
3.2 WARNING
3.3 CAUTION
3.4 IMPORTANT SAFETY INSTRUCTIONS
3.5 USER RESPONSIBILITY
4
4.1 UNPACKING
4.2 FRONT PANEL
4.3 REAR PANEL
5
5.1 GAIN SWITCH
5.2
5.3 OPERATING MODES
5.4 IMPEDANCE MATCHING (MLS SWITCH)
6
6.1 MOUNTING
6.2 COOLING
6.3 OPERATING VOLTAGE
6.4 DENMARK
6.5 SWITZERLAND
6.6 GROUNDING
6.7 POWER CONSUMPTION
7
7.1 INPUT CONNECTIONS
7.2 CONNECTING SPEAKERS
8
8.1 OPERATING PRECAUTIONS
8.2 POWERING UP – SOFT START
8.3 INPUT ATTENUATORS
8.4 INDICATORS
9
9.1 OUTPUT LIMITER
9.2 THERMAL PROTECTION
9.3 VHF PROTECTION
9.4 SHORT CIRCUIT PROTECTION
9.5 AC MAINS VOLTAGE PROTECTION
9.6 DC. PROTECTION
10
10.1 TROUBLESHOOTING
11
12
All material © 2007. Martin Audio Ltd. Subject to change without notice.
PRINT
CONTENTS MA2.8S USER GUIDE
APPROVALS
WARNINGS
3.5.1
LOUDSPEAKER DAMAGE
3.5.2
LOUDSPEAKER OUTPUT HAZARD
3.5.3
RADIO INTERFERENCE
INTRODUCTION
REAR PANEL FEATURES
5.1.1
GAIN
5.1.2
SENSITIVITY
5.1.3
OPTIONS
LINK SWITCH
5.3.1
STEREO MODE
5.3.2
NOTES FOR AMPLIFIER TESTING
5.3.3
TANDEM MODE
5.3.4
BRIDGE MONO MODE
5.3.5
BRIDGE MONO MODE FEATURES
5.4.1
THE MLS TECHNOLOGY
5.4.2
THE PROBLEM
5.4.3
THE SOLUTION
INSTALLATION
6.7.1
CALCULATION
CONNECTIONS
7.1.1
BALANCED INPUTS
7.1.2
UNBALANCED INPUTS
OPERATION
PROTECTION FEATURES
MAINTENANCE
WARRANTY
SPECIFICATIONS MA2.8S
Martin Audio – MA2.8s Amplifier
1
GUIDES
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Summary of Contents for Martin Audio MA2.8s

  • Page 1 9.2 THERMAL PROTECTION 9.3 VHF PROTECTION 9.4 SHORT CIRCUIT PROTECTION 9.5 AC MAINS VOLTAGE PROTECTION 9.6 DC. PROTECTION MAINTENANCE 10.1 TROUBLESHOOTING WARRANTY SPECIFICATIONS MA2.8S All material © 2007. Martin Audio Ltd. Subject to change without notice. Martin Audio – MA2.8s Amplifier...
  • Page 2 11. O nly use a cce ssorie s spe cifie d b y th e m an ufa cture r. All material © 2007. Martin Audio Ltd. Subject to change without notice. Martin Audio – MA2.8s Amplifier...
  • Page 3 C on su lt yo ur de aler or a n e xp erien ce d e ng in e er/ techn ician fo r he lp . All material © 2007. Martin Audio Ltd. Subject to change without notice.
  • Page 4 5 . Sign a l pre se nt in dica tor T his LE D illu mina te s a t – 40 dB be low fu ll o utp ut sign al All material © 2007. Martin Audio Ltd. Subject to change without notice. Martin Audio – MA2.8s Amplifier...
  • Page 5 . C on ne c t th e m ains ca ble o nly to th e A C so u rc e re ferre d to on th e lab el. All material © 2007. Martin Audio Ltd. Subject to change without notice.
  • Page 6 T he L in k switch loca te d o n th e rea r p an el (the ce ntra l D IP -sw itch ) is fo r cha ng ing th e op era ting mo de o f the am plifier (se e be low , section 5.3). All material © 2007. Martin Audio Ltd. Subject to change without notice. Martin Audio – MA2.8s Amplifier...
  • Page 7 All material © 2007. Martin Audio Ltd. Subject to change without notice. Martin Audio – MA2.8s Amplifier...
  • Page 8 (Therma l p ro tect ion ma y occu r a t h ig h co n tinu o us p ow er) . Pow er in w at t s (EIA 1 kH z, 1% TH D) T ab le 1 . All material © 2007. Martin Audio Ltd. Subject to change without notice. Martin Audio – MA2.8s Amplifier...
  • Page 9 . If the a mp lifie r is ra ck mo u nted , d o no t u se co ve rs or d oo r o n the fro n t or re ar o f the All material © 2007. Martin Audio Ltd. Subject to change without notice.
  • Page 10: Approvals

    ‘n orma l’ use con ditio n. T o d esig n a All material © 2007. Martin Audio Ltd. Subject to change without notice.
  • Page 11 1 /8 P ow e r le vel = N o rm al op erating p o we r with mu sic a s p ro gra mm e so u rce, 9d B he a droo m All material © 2007. Martin Audio Ltd. Subject to change without notice.
  • Page 12: Gain

    . 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.
  • Page 13 W AR NING : T o p re ve nt elec tric sh o ck , d o no t o pe ra te th e a mp lifie r with an y o f th e lou d sp ea ke r c ab le c on du cto rs e x po se d. All material © 2007. Martin Audio Ltd. Subject to change without notice. Martin Audio – MA2.8s Amplifier...
  • Page 14: Installation

    . U nd er no rm a l use the se fe ature s are ina ud ible. All p ro te ction circuits op era te ind e pe nd e ntly. All material © 2007. Martin Audio Ltd. Subject to change without notice. Martin Audio – MA2.8s Amplifier...
  • Page 15: Cooling

    B oth th e se circuits co me in to e ffe ct on ce a DC le ve l ha s b ee n d etected o n e ithe r cha n ne l. All material © 2007. Martin Audio Ltd. Subject to change without notice.
  • Page 16: Maintenance

    M artin A ud io ca nn ot be h e ld res p on sib le for da ma g e or in ju ry as a re su lt of the to p c ov er b e in g rem ov ed . All material © 2007. Martin Audio Ltd. Subject to change without notice.
  • Page 17: Operation

    F ax: + 4 4 (0 ) 1 49 4 4 38 66 9 E -m ail: in fo @ma rtin -au dio .com www .m artin -a u dio.co m All material © 2007. Martin Audio Ltd. Subject to change without notice. Martin Audio – MA2.8s Amplifier...
  • Page 18 (W) 4 83 m m x (H) 8 8m m x (D) 3 93 m m (in cl. Ha n dles) (W) 1 9in s x (H) 3 .5 ins x (D ) 15 .5ins (incl. Ha nd les) All material © 2007. Martin Audio Ltd. Subject to change without notice. Martin Audio – MA2.8s Amplifier...
  • Page 19: Shipping Weight

    Tra de ma rks o f L ab G ru pp en AB K un gsba cka S w ed en . All material © 2007. Martin Audio Ltd. Subject to change without notice.
  • Page 20 The Martin Experience Century Point, Halifax Road, Cressex Business Park, High Wycombe, Buckinghamshire HP12 3SL, England. Telephone: +44 (0)1494 535312 Facsimile: +44 (0)1494 438669 Web: www.martin-audio.com E-mail: info@martin-audio.com All material © 2007. Martin Audio Ltd. Subject to change without notice.
  • Page 21 < > CONTENTS PRINT GUIDES MA2.8s Amplifier User’s Guide ENGLISH The Martin Experience All material © 2007. Martin Audio Ltd. Subject to change without notice.

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