User manual MARTIN AUDIO WT UB

[. . . ] Its narrow width allows minimal separation between the two 6. 5" (165mm) cone drivers. This factor and the drivers' 60° splay are responsible for the seamless horizontal coverage of the WT UB. The two 6. 5" (165mm) drivers feature 1. 5" (38mm) voice coils and an innovative heat exchange system to reduce power compression. [. . . ] Subject to change without notice. 3 Martin Audio ­ WT UB CONTENTS < 4. 2 > ENGLISH PRINT GUIDES Rigging 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. The WT UB is supplied with threaded inserts and a mounting yoke to allow the suspension of a single enclosure. Please note that suspending one enclosure from another using these inserts to form an array or cluster is not recommended. 5 AMPLIFICATION The WT UB speaker should be used with professional power amplifiers capable of producing 200-400W into 4 ohms. Whilst the WT UB does not require a controller for crossover or equalisation functions it is advisable to provide signal limiting to avoid amplifier clipping. To perform this function the WX3A, MX5 and DX1 controllers can be configured purely as high performance limiters. Additional protection of the high frequency line array is provided by an autoresetting over-current device. This protects against overload as a result of severe amplifier clipping and short high frequency, high power bursts such as microphone feedback. When the over-current device operates it may be necessary to turn down the signal level to the speaker in order to reset the device and restore high frequency output. 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. [. . . ] This warranty does not affect your statutory rights. All material © 2007. Subject to change without notice. 6 Martin Audio ­ WT UB CONTENTS < 10 > ENGLISH PRINT GUIDES TECHNICAL SPECIFICATIONS WTUB TYPE FREQUENCY RESPONSE (1) DRIVERS RATED POWER (2) RECOMMENDED AMPLIFIER SENSITIVITY (3) MAXIMUM SPL (4) IMPEDANCE DISPERSION (-6dB) CROSSOVER ENCLOSURE FINISH PROTECTIVE GRILLE CONNECTORS FITTINGS DIMENSIONS WEIGHT SHIPPING DIMENSIONS SHIPPING WEIGHT Two-way passive, reflex enclosure 80Hz-18kHz ± 3dB 2 x 6. 5" (165mm) bass mid drivers with 1. 5'' (38mm) voice coil 3 x 1" (25mm) soft dome HF line array 200W AES, 800W peak 200-400W into 4 ohms 93dB 1 Watt/1 metre 115dB continuous, 121dB peak 8 ohms nominal 120° horizontal, 40° vertical 1. 2kHz passive 16 litre (0. 6 cu foot) multi-laminate birch ply Textured black paint Black perforated steel 2 x Neutrik NL4 switchable for input +1, -1 or +2, -2 2 x M8 threaded inserts for dedicated bracket 1 x M8 insert for safety point 1 x pole mount socket (W)480mm x (H)212mm x (D)342mm (W)18. 9ins x (H)8. 4ins x (D)13. 5ins 12kg (26. 4 lbs) (W) 560mm x (H) 320mm x (D) 410mm (W) 22ins x (H)12. 5ins x (D)16. 1ins 16kg (35. 3lbs) Notes 1. Measured on-axis in half space at 2 metres, then referred to 1 metre. [. . . ]