User manual MARTIN AUDIO LE700A

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Manual abstract: user guide MARTIN AUDIO LE700A

Detailed instructions for use are in the User's Guide.

[. . . ] 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 accept any responsibility for damage to any returned product through the use of non-approved packaging. 3 OVERVIEW The LE Series products covered in this guide include the LE350A, LE12J, LE400C and LE700A. [. . . ] Please take some time to review the following points concerning safe use of LE 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. 3 Martin Audio ­ LE SERIES CONTENTS < 5 > ENGLISH PRINT GUIDES AMPLIFICATION LE Series monitors are designed to be used with professional power amplifiers capable of producing the following power outputs into 4 ohms: LE350A LE12J LE400C LE700A 500-700W 500-700W 500-700W 550-800W 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. 4 Martin Audio ­ LE SERIES CONTENTS < 6 > ENGLISH PRINT GUIDES CONNECTIONS The LE350A and LE12J are fitted with two Neutrik Speakon NL4 connectors wired in parallel. LE350A Passive Input Input + N/C N/C LE12J Active LF LF + HF HF + NL4 -1 +1 -2 +2 The LE400C is fitted with two Neutrik Speakon NL4 connectors wired in parallel plus an XLR connector. [. . . ] 4" (100mm) voice coil 1. 4" (35mm) exit compression driver LF: 400W AES, 1600W peak HF: 75W AES, 300W peak 550-800W into 4 ohms LF: 98dB / HF: 106dB LF: 123dB continuous, 129dB peak HF: 125dB continuous, 131 dB peak LF: 8 ohms nominal HF: 16 ohms nominal 1000Hz 50-100 degs horizontal (differential dispersion), 70 degs vertical 80 litres 2 x Speakon (W) 710mm x (H) 470mm x(D) 554mm (W) 27. 9ins x (H) 18. 5ins x (D) 21. 8ins 44kg (97lbs) (W) 820mm x (H) 520mm x (D) 570mm (W) 32. 3ins x (H) 20. 5ins x (D) 22. 4ins 46kg (101. 4lbs) NOTES (LE Series) Sensitivity measured in half-space conditions at 1 metre with 1 watt input, using band limited pink noise. SPL measured at 1 metre using band limited pink noise. Protective grilles: Perforated steel black with 48% free air flow. [. . . ]

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