User manual ELECTRO-VOICE DL15W

[. . . ] (Do not expose the cone to direct water or sunlight. ) The DL18MT is a true high-fidelity woofer in every sense, being capable of high output, low distortion and solid bass response. DL18MT Low-Frequency Reproducer Electrical Connections The DL18MT is fitted with a pair of plated, frame-mounted connectors with color-coded ends. Electrical connection is made by pushing down, inserting wire completely through the rectangular slot and releasing pressure. One conductor of #9 stranded, #8 AWG solid, a pair of twisted #15 AWG stranded or a pair of #14 AWG solid conductors will fit. Typical Amplifier Size 400-800 watts per woofer is the optimal amplifier size. Amplifiers of this size will allow maximum output with minimal risk of speaker damage when properly used. [. . . ] The excursion of the DL18MT at these frequencies is much reduced compared to sealed or open-back enclosures, directly reducing harmonic distortion and the possibility of speaker bottoming. Thiele-Small parameters are provided so designers can tailor the response to suit their needs. Normally Tuned Enclosures A 1. 8 cubic-foot enclosure tuned to 55 Hz has a smooth extended response to below 50 Hz. The 1. 1 cubic-foot enclosure "bumps up" above 70 Hz but has less extended low-bass output. Directional Characteristics The directional characteristics of the DL18MT in the 7. 4-cubic-foot TL18-1 vented enclosure were measured in ElectroVoice's large anechoic chamber. The test signal was one-third-octave filtered pink noise centered at the frequencies indicated. All directional information was measured at 20 feet. Figure 1 shows the horizontal and vertical beamwidths. Beamwidth is the angle at which the horizontal and vertical polar responses have decreased in level by 6 dB when compared to the axial frequency response. Figure 2 illustrates the total directivity of the DL18MT. The directivity factor Rq (Q) is the relative value, at a point, of the DL18MT when compared to an ideal spherical response. The directivity index, Di, is calculated by the formula: Di = 10 log10 Rq. Figure 1 Specifications: Usable Axial Frequency Response in Typical Enclosure (4. 0 ft3 tuned to 40 Hz), Swept One-Third-Octave Pink Noise, 4 Volts at 10 Feet, Anechoic Environment, Normalized for 1 Watt/1 Meter: . . . . . . 30-3, 000 Hz Power Handling Per ANSI/EIA RS-426-A 1980: . . . . . . . . . . . . . . . . . . . . . . 0. 269 OMS: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6. 59 QTS: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0. 259 RE: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6. 0 ohms 0: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2. 9 % SD: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0. 130 m2 (201 in. 2) MMD: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0. 151 kg (0. 333 lb) LE : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2. 7 mH CMS: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0. 246 mm/N RMS: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4. 08 mechanical ohms PE(max) (per ANSI/EIA RS-426-A 1980): . . . . . . . . . . . . . . . . . . . . . . . . . . . 400 watts XMAX1: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Copper Voice-Coil Insulation: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Polyimide 220°C rating Voice-Coil Form: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Polyimide Back Cover: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Black, advanced synthetic elastomer Net Weight: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]