Nexo Alpha System Manuel d'utilisateur

ααα P 1 USER MANUAL VERSION :1.01 DATE : 06/10/10 ααα USER MANUAL

ααα P 10 USER MANUAL VERSION :1.01 DATE : 06/10/10 1± - - In VLF (S2) In / Out VLF (S2) 2± - - In / Out LF (B1) In / Out LF (B1) 3± -

ααα P 11 USER MANUAL VERSION :1.01 DATE : 06/10/10 2.2. FLYING THE SYSTEM Alpha Series loudspeakers are equipped with steel anchor plates that

ααα P 12 USER MANUAL VERSION :1.01 DATE : 06/10/10 • Correct training is fundamental to safe practise when working with loudspeakers flying s

ααα P 13 USER MANUAL VERSION :1.01 DATE : 06/10/10 2.3. TDCONTROLLERS SETTINGS The Alpha Series speakers do not work properly without their a

ααα P 14 USER MANUAL VERSION :1.01 DATE : 06/10/10 down to 40Hz). On the contrary, if the system includes Alpha S2 sub-bass cabinets, and the

ααα P 15 USER MANUAL VERSION :1.01 DATE : 06/10/10 2.4. INITIAL SET-UP PRECAUTIONS When starting up a system including brand new cabinets, NE

ααα P 16 USER MANUAL VERSION :1.01 DATE : 06/10/10 1 10 10060.00070.00080.00090.000100.00110.00Sound Pressure Level (dBSPL) / distance (meters

ααα P 17 USER MANUAL VERSION :1.01 DATE : 06/10/10 1 10 10060.00070.00080.00090.000100.00110.00Sound Pressure Level (dBSPL) / distance (meters

ααα P 18 USER MANUAL VERSION :1.01 DATE : 06/10/10 3.3.4. HYGROMETRY AND TEMPERATURE - AIR ABSORPTION Under usual conditions, air absorption :

ααα P 19 USER MANUAL VERSION :1.01 DATE : 06/10/10 The speed of sound C varies with temperature according to the formula below : 273 t20

ααα P 2 USER MANUAL VERSION :1.01 DATE : 06/10/10 CONTENT INTRODUCTION 4 PLEASE READ CAREFULLY BEFORE PROCEEDING 5 1. ALPHA SERIES DESCRIP

ααα P 20 USER MANUAL VERSION :1.01 DATE : 06/10/10 • resulting directivity At low frequencies, because wavelength is much larger than the spac

ααα P 21 USER MANUAL VERSION :1.01 DATE : 06/10/10 4. Amplifiers 4.1. RECOMMENDED POWER For best results, NEXO specifies a range of amplifier

ααα P 22 USER MANUAL VERSION :1.01 DATE : 06/10/10 II. TECHNICAL SPECIFICATIONS 4.4. ALPHA S2 SYSTEM SPECS ALPHA S2 with SubTD Controller Fr

ααα P 23 USER MANUAL VERSION :1.01 DATE : 06/10/10 4.5. ALPHA B1-15 / B1-18 SYSTEM SPECS ALPHA B1-15 ALPHA B1-18 Frequency Response [a] Wide

ααα P 24 USER MANUAL VERSION :1.01 DATE : 06/10/10 4.6. ALPHA M3 / M8 SYSTEM SPECS ALPHA M3 ALPHA M8 Frequency Response [a] 190 Hz – 19 kHz ±

ααα P 25 USER MANUAL VERSION :1.01 DATE : 06/10/10 4.7. ALPHA EM / EF SYSTEM SPECS ALPHA EM ALPHA EF Frequency Response [a] 220 Hz – 19 kHz ±

ααα P 26 USER MANUAL VERSION :1.01 DATE : 06/10/10 4.8. DIRECTIVITY TABLES Off-Axis Attenuation from On-Axis Frequency Response (dB) 125 Hz An

ααα P 27 USER MANUAL VERSION :1.01 DATE : 06/10/10 5. CURVES 5.1. ALPHA S2 Frequency Response with SubTD Controller (dB) Impedance (Ohms

ααα P 28 USER MANUAL VERSION :1.01 DATE : 06/10/10 5.4. ALPHA M3 Frequency Response with AlphaTD Controller (dB) Impedance (Ohms)

ααα P 29 USER MANUAL VERSION :1.01 DATE : 06/10/10 Alpha M3 - Horizontal Directivity ( 5dB / div.) 50 100 150 200 250 300 350 400 450 500 550

ααα P 3 USER MANUAL VERSION :1.01 DATE : 06/10/10 3.4. DIRECTIVITY - COVERAGE 19 3.4.1. Directivity of Multiple Sources - What Happens ? 1

ααα P 30 USER MANUAL VERSION :1.01 DATE : 06/10/10 Alpha M3 – Vertical Directivity ( 5dB / div.) 50 100 150 200 250 300 350 400 450 500 55001

ααα P 31 USER MANUAL VERSION :1.01 DATE : 06/10/10 5.5. ALPHA M8 Frequency Response with AlphaTD Controller (dB) Impedance (Ohms)

ααα P 32 USER MANUAL VERSION :1.01 DATE : 06/10/10 Alpha M8 – Horizontal Directivity ( 5dB / div.) 50 100 150 200 250 300 350 400 450 500 5500

ααα P 33 USER MANUAL VERSION :1.01 DATE : 06/10/10 Alpha M8 Vertical Directivity ( 5dB / div.) 50 100 150 200 250 300 350 400 450 500 5500100

ααα P 34 USER MANUAL VERSION :1.01 DATE : 06/10/10 5.6. ALPHA EM Frequency Response with AlphaETD Controller (dB) Impedance (Ohms) Direct

ααα P 35 USER MANUAL VERSION :1.01 DATE : 06/10/10 Alpha EM – Horizontal Directivity ( 5dB / div.) 50 100 150 200 250 300 350 400 450 500 5500

ααα P 36 USER MANUAL VERSION :1.01 DATE : 06/10/10 Alpha EM – Vertical Directivity ( 5dB / div.) 50 100 150 200 250 300 350 400 450 500 55001

ααα P 37 USER MANUAL VERSION :1.01 DATE : 06/10/10 III. DIMENSIONS ALPHA B1-18ALPHA EFALPHA EM22.5°754[29 11/16"]688.77 [27 1/8"]12

ααα P 38 USER MANUAL VERSION :1.01 DATE : 06/10/10 IV. TRANSPORT ALPHA S2EMB1-18EMB1-18M3M8B1-15B1-15ALPHA EF3175 [125"]2400 [94 1/2"

ααα P 39 USER MANUAL VERSION :1.01 DATE : 06/10/10 V. Connection Diagrams 3061215927302427303062418211815129212463027309121518211563091224273

ααα P 4 USER MANUAL VERSION :1.01 DATE : 06/10/10 Introduction Thank you for selecting NEXO Alpha Series. This manual is intended to provide y

ααα P 40 USER MANUAL VERSION :1.01 DATE : 06/10/10 Raccord SP4Cable SP8Puissances Requiseset CâblageHF / MF700 à 1000 Wattssous 8 Ohms par ca

ααα P 5 USER MANUAL VERSION :1.01 DATE : 06/10/10 PLEASE READ CAREFULLY BEFORE PROCEEDING BASIC PRECAUTIONS Do not open the speaker system o

ααα P 6 USER MANUAL VERSION :1.01 DATE : 06/10/10 SAFETY INSTRUCTIONS FOR NEXO TD CONTROLLERS NEXO ANALOGUE PSTDCONTROLLERS, NX242 DIGITAL CO

ααα P 7 USER MANUAL VERSION :1.01 DATE : 06/10/10 HIGH SOUND PRESSURE LEVELS Exposure to extremely high noise levels may cause permanent heari

ααα P 8 USER MANUAL VERSION :1.01 DATE : 06/10/10 1. Alpha Series description 1.1. LOUDSPEAKERS The Alpha range includes the following speaker

ααα P 9 USER MANUAL VERSION :1.01 DATE : 06/10/10 The X-BOW flying system includes four main components, references are: • ALXBOW : main chas