Martin audio EM15, EM150, EM26 user manual

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		CONTENTS (ENGLISH)													Page No
		1			INTRODUCTION										2
		2			UNPACKING										2
		3			EM15 IMPEDANCE										3
		4			SAFETY FIRST										4
		4.1			Rigging and suspension										4
		5			AMPLIFICATION										4
		6			CONNECTING TO AN AMPLIFIER										5
		7			SYSTEM CONFIGURATIONS										5
		8			WARRANTY										7
9					TECHNICAL SPECIFICATIONS										8

MARTIN AUDIO

L O N D O N

The Martin Experience

Martin Audio – EM SERIES

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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.

Standards Applied	EMC Emission	EN55103-1:1996
	Immunity	EN55103-2:1996
	Electrical Safety	EN60065:1993

1 INTRODUCTION

Thank you for purchasing a Martin Audio EM Series loudspeaker system. The EM15 is a miniature trapezoid full-range loudspeaker featuring twin 5"(125mm) drivers in a unique two-way configuration utilising patented ICT™ (Inductively Coupled Transducer) technology. The EM150 is a twin 10"(250mm) driver sub-bass system designed to be used to extend the low frequency performance of the EM15. It can also be used with larger EM Series enclosures such as the EM26.

Ideally suited to background and foreground music reproduction, the EM15 and EM150 are compact and easily installed. An external crossover is not necessary, but an EMX1A controller will increase the versatility of the complete system, adding relative level control and driver protection.

2 UNPACKING

Each Martin Audio loudspeaker is built to the highest standard and thoroughly inspected before it leaves the factory. After unpacking the system, examine it carefully for any signs of transit damage and inform your dealer if any such damage is found. It is suggested that you retain the original packaging so that the system can be repacked at a future date if necessary.

Please note that Martin Audio and its distributors cannot be held responsible for damage to any returned product through the use of non-approved packaging.

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3 EM15 IMPEDANCE

The EM15 can be configured as either a 4 ohm or 16 ohm loudspeaker. The 16 ohm configuration allows up to 4 x EM15’s to be run in parallel from a single amplifier channel. The EM15 is normally supplied from the factory in the 4 ohm configuration. To convert it to 16 ohms, follow the procedure below.

Fig 1

FRONT

Terminal panel

BACK

Twin Terminal

Insulated terminal

block

INPUT

1.Remove terminal panel from rear of cabinet (4 pozi screws)

2.Remove red and black wires from the twin terminal, connect to each end of the insulated terminal block.

3.Replace terminal panel.

RED

BLACK

BROWN

BLUE

4 ohm

BROWN

BLUE

RED

BLACK

16 ohm

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4 SAFETY FIRST

It is important that loudspeaker systems are used in a safe manner. Please take some time to review the following points concerning safe use of EM Series loudspeakers.

Professional loudspeakers are capable of producing extremely high sound levels and should be used with care. Hearing loss is cumulative and can result from levels above 90dB if people are exposed for a long period. Never stand close to loudspeakers driven at high level.

4.1Rigging and suspension

WARNING: Suspending the system should only be done by qualified personnel following safe rigging practices. Secure fixings to the building structure are vital. Seek help from architects, structural engineers or other specialists if in any doubt.

5 AMPLIFICATION

The EM15 and EM150 are designed to be used with professional power amplifiers capable of producing the following power outputs into 4 ohms:

EM15	4 ohm	50-100W
EM15	16 ohm	200-400W
EM150		400-500W

Care should be taken to avoid amplifier clipping. It is important to understand that a low power amplifier driven into clipping is more likely to damage a loudspeaker than a higher power amplifier used within its ratings. This is because music signals have a high peak-to-average "crest" factor. When an amplifier is severely overdriven, its output waveform is clipped (its peaks are squared off) – reducing the crest factor. In extreme cases, the waveform can approach that of a square wave. An amplifier is normally capable of producing far more power under these conditions than its undistorted rated power output.

The use of very high power amplifiers with outputs greater than those recommended is discouraged.

Care should be taken to avoid switch-on surges, which can result in momentary power peaks in excess of specified ratings. When powering up a sound system it is important to switch on the amplifiers after the mixer and control electronics have stabilised. When powering down the system, reverse the sequence and switch off the amplifiers first.

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