User manual MARTIN AUDIO BLACKLINE F215

[. . . ] High frequencies are reproduced by a 1. 4" (35mm) exit titanium diaphragm compression driver, loaded by a proprietary rotatable 80° x 50° constant directivity horn. The trapezoidal enclosure is of multi-laminate birch ply construction incorporating a tough punched steel grille. Two large ports permit uncompressed low frequency output at high input levels. [. . . ] Never suspend one enclosure from another to form an array or cluster using these fittings. The common practice of using commercially available eye bolts for suspension should only be undertaken with great caution. Eye bolts are strongest along the thread axis. Angling the enclosure will result in an angle pull and it is important to use eye bolts that are safe in these circumstances. Only forged shoulder eye bolts should be considered and it is important that the thread length is at least 30mm. A flat washer should be inserted between the eyebolt and the enclosure. those which are formed from a steel rod bent into an eye should be avoided. 5 AMPLIFICATION The F215 loudspeaker is designed to be used with professional power amplifiers capable of producing the 400-1000W into 4 ohms: 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. [. . . ] or any use of this product that is not in accordance with the instructions provided by Martin Audio. Martin Audio is not liable for consequental damages. This warranty is exlusive and no other warranty is expressed or implied. [. . . ]