CONTENTS < > PRINT GUIDES All material © 2007. Martin Audio Ltd. Subject to change without notice. 1 Martin Audio – MA1.3s Amplifier Page No 1 2 2 2 2 2 2 3 3 3 3 4 4 4 5 5 5 6 6 6 6 6 6 6 7 7 7 8 8 8 8 9 9 9 9 10 10 10 11 11 12 12 12 12 12 13 13 13 13 14 14 14 14 14 15 16 ENGLISH CONTENTS (ENGLISH) 1 CONTENTS MA1.3S USER GUIDE 2 APPROVALS 3 WARNINGS 3.1 EXPLANATION OF GRAPHICAL SYMBOLS 3.2 WARNING 3.3 CAUTION 3.4 IMPORTANT SAFETY INSTRUCTIONS 3.5 USER RESPONSIBILITY 3.5.1 LOUDSPEAKER DAMAGE 3.5.
CONTENTS < PRINT GUIDES APPROVALS This equipment conforms to the requirements of the EMC directive 89/336/EEC, amended by 92/31/EEC and 93/68/EEC and the requirements of the Low Voltage Directive 73/23/EEC, amended by 93/68/EEC. Standard Applied 3 3.1 EMC Emission EMC Immunity Electrical Safety EN55103-1, E3 EN55103-2, E3, with S/N below 1% at normal operation level.
CONTENTS < > GUIDES 12. The amplifier is intended to use in a 19” rack. Follow the mounting instructions. When racks with wheels are used, use caution to avoid injury from tipping when in motion. 13. Unplug this apparatus during lightning storms or when unused for long periods of time. 14. Do not connect an amplifier output in parallel or series with any other amplifier’s output.
CONTENTS < PRINT GUIDES INTRODUCTION Thank you for purchasing a Martin Audio power amplifier. This manual contains important information on operating your amplifier correctly and safely. Please take some time to read this manual and familiarize yourself with the advanced features of this amplifier. 4.1 Unpacking Each Martin Audio MA series amplifier is built to the highest standard and thoroughly inspected before it leaves the factory.
CONTENTS < > PRINT GUIDES 8. Power switch Turns mains power on or off. (See page 8 and 12 ) 4.3 Rear Panel 1 2 3 On Off Clip Limiter A CH. B 4 5 6 ? 4 INPUT CH.B LINK 3 CH.A LINK CH. A 1 INPUT OUTPUT CH.A OUTPUT CH.B LINK / BRIDGE A+B GAIN CH.B GAIN CH.A STEREO ON GAIN 1 23 2 0dB MARTIN AUDIO MA1.3sMade in the EEC by On 2 6dB 1 /4 “ 2 9dB Sleeve 3 2dB Tip 3 5dB Ring 3 8dB 2 30-240V 50-60Hz4 1 dB Must be grounded Current consumption: 8.
CONTENTS < > PRINT GUIDES Different gains and function can be selected for channel A and B, by appropriate setting of the DIP switch. Selecting the maximum gain of the amplifier is always a trade off between noise and headroom. A low gain amplifier amplifies less of the noise of the preceding equipment (mixer, crossover, equalizer etc.). A higher input level is then required to attain full power output, so the headroom will be decreased on mixer or crossover outputs.
CONTENTS < > PRINT GUIDES Reverse operation of Channel B. 5.3.3 Tandem mode In tandem mode channel A input is linked to channel B input, either input socket may then be used to provide the input signal. Tandem mode is activated by placing the two central switches (4 and 5) in the “ON” position (UP). Both input attenuator’s are active, allowing you to set different levels for each channel. Note that only the inputs are connected in parallel. This is NOT a parallel output mode.
CONTENTS < > PRINT GUIDES ENGLISH 6 6.1 INSTALLATION Mounting The amplifier is two rack units high (2U) and weighs 7.9Kg (17lbs) and will mount in a standard EIA 19” rack. Amplifiers may be stacked directly on top of each other. There is no need for spacing between units. If it is the intention to fill a rack with amplifiers, we recommend racking is started from the bottom of the rack.
CONTENTS < > PRINT GUIDES 6.4 Denmark: National deviation concerning installation of the MA1.3s: Danish safety regulation only permits the use of an 8A main fuse. As the MA 1.3s uses an internal primary mains fuse of 15A, the MA1.3s must be equipped with an industrial mains connector rated for 16A or above, or as an alternative it can be hard wired to a 16A capacity circuit and breaker. 6.5 Grounding There is no ground lift switch or terminal on this amplifier.
CONTENTS < > PRINT GUIDES The heat power can be calculated as follows: If a headroom figure of at least 5dB (1/3 of full power) is used with a 4 ohms load on each output of the amplifier. The 1/3 power per channel is then; 650 / 3 = 217watts, and the total output power = 2 x 217 = 433 watts. The power consumption according to the chart above is then 1330watts. The heat power produced is the difference between the power consumption and output power; 1120 - 433 = 687 watts total for the amplifier. MA1.
CONTENTS < > GUIDES CH.A LINK INPUT CH.B LINK CH. A ENGLISH CH. B PRINT INPUT LINK / BRIDGE A+B GAIN CH.B GAIN CH.A STEREO GAIN 1 2 3 2 0 dB OFF 2 3 dB ON 2 6 dB 1/ 4“ 2 9 dB Scrn Sleeve 3 2 dB Pos Tip 3 5 dB Neg Ring 3 8 dB 2 3024 0V 5 060Hz 4 1dB Mus t be grounded Current consump tion: 8.7A XLR Pin 1 2 3 678 The input impedance is high enough (20k ohms balanced) to allow ”daisy-chaining”, or multiple parallel input connections.
CONTENTS < > PRINT GUIDES ENGLISH Channel A and B into one Speakon (Stereo and Bi-amp) Channel A and B into two separate Speakons. Bridged mono Never connect either output terminal to ground or to some other output or input terminal (see warnings in chapter 1) For normal two-channel operation, connect each speaker load across the output’s positive and negative terminals. Pay attention to speaker polarity; loudspeakers connected out of polarity degrade sound quality.
CONTENTS < > PRINT GUIDES ENGLISH PROTECT CLIP -40dB ON MA1.3s PROTECT CLIP -40dB ON Front Indicators The Clip/limit indicator tells when the amplifier output is clipping or limiting. It has two different indication statuses: • If the clip limiter is engaged it has a short time constant and it illuminates briefly. • If the clip limiter is not engaged it has an increased time constant and illuminates for a longer period. The remaining yellow LEDs indicate if any protection circuits are activated.
CONTENTS < PRINT GUIDES Short circuit protection All Martin Audio MA Series amplifiers are completely short circuit protected. The protection circuit permits very high peak currents, but still holds the output devices within the safe operating area. If a short circuit is maintained, the channel affected will eventually go into a thermal protect cycle until the short circuit has been removed. 9.
CONTENTS < > PRINT GUIDES ENGLISH 11 WARRANTY General The MA 1.3s Power amplifier is warranted to be free from defects in components and factory workmanship under normal use and service, for a period of three years from the date of original purchase.
CONTENTS < > PRINT GUIDES ENGLISH 12 SPECIFICATIONS MA1.3S MAXIMUM OUTPUT POWER 8Ω 4Ω 2Ω 8Ω 4Ω EIA @1kHz 1% thd FTC 20 – 20kHz @ 0.
CONTENTS < > PRINT GUIDES (W) 560mm x (H) 180mm x (D) 500mm (W) 22ins x (H) 7.1ins x (D) 19.7ins SHIPPING WEIGHT 9.6Kg (21.
CONTENTS < > PRINT GUIDES MA1.3s Amplifier Please Click here to return to main menu Please Click here to visit our website 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.
CONTENTS < > PRINT GUIDES MA1.3s Amplifier User’s Guide ENGLISH The Martin Experience All material © 2007. Martin Audio Ltd. Subject to change without notice.
