User manual ELECTRO-VOICE 81PMX

[. . . ] EV, a product brand of Telex Communications, Inc. , shares technology with other Telex product brands: Dynacord®, Klark-Teknik®, Midas®, RTS®, and TELEX®. 1934--EV invents the humbucking coil for microphones (still a standard almost 70 years later). 1940s--EV introduces noise cancellation to microphones; revolutionizes tank and aircraft communications. 1954--EV introduces VariableD® microphone technology, a means of eliminating the upclose bass boost of conventional, single-D directional microphones--for high vocal intelligibility under the typical varying conditions of use in churches and meeting rooms. 1963--EV receives an award from the Academy of Motion Picture Arts and Sciences for the development of a shotgun microphone--the 642 Cardiline® --which significantly advances the quality of sound on film. 1974--EV develops constantdirectivity (CD) horns. For the first time, a loudspeaker maintains its rated coverage angles over a wide frequency range, for significantly more uniform sound quality and higher intelligibility throughout the audience. 1986--EV revolutionizes concert sound reinforcement by introducing Manifold Technology®. In each of four bandpasses covering the entire frequency range, the output of four loudspeakers is flawlessly combined ­ or "manifolded"­ into a single horn or low-frequency enclosure. The result is ­ in a physical package a fraction of the size of conventional concert rigs ­ four times the acoustic output without the drastically uneven coverage of multiple acoustic sources "stacked" for more output. 1990s--EV invents RMDTM technology (Ring-Mode Decoupling), a revolutionary anodyne to sonic distortion and coloration. [. . . ] The outer case of UW 30 is made of high-impact ABS and is pool-blue in color. All internal components are sealed inside the speaker through a "hot-melt" process, allowing it to be used in fresh- or salt-water pools or ocean enviroments. Sound dispersion is up to 30 x 30 feet (10 x 10 m) under water. Operating depth is up to 10 feet (3 m), with a recommended depth of 4 feet (1. 2 m). Note: For overload protection, install a 25-ohm, 20-watt resistor in parallel with a 1. 5amp, fast-blowing fuse in series with the speaker. UW 30 · · · · · Full-range underwater sound source Uniform sound throughout medium-sized pools Very high-fidelity sound Salt-water resistant Comes with a 50-foot (15-m), three-conductor waterproof cable terminated within the internal encapsulation material Ultracompact monitor system EV®'s S-40 produces maximum frequency response with an extended bass response. The sensitivity, therefore, is slightly less than with a regularly tuned box. The S-40 is made of black or white high-impact polystyrene structural foam protected with a full-size, matching front grille. S-40 B · · · · · · · Two-way, full-range ultracompact Ultra-linear frequency response Vented LF enclosure Full bandwidth protection circuit for woofer and tweeter Ferrofluid-cooled soft-dome tweeter Trapezoidal 2 x 1/4"­20 suspension points UW 30 Frequency range Sensitivity (SPL 1W/1m) Max. SPL/1m (calc. ) Long-term power handling Short-term power handling Coverage (H° x V°) Directivity Index LF driver HF driver Crossover frequencies Nominal impedance (low Z version) Minimum impedance (low Z version) Input connections Dimensions (H x W at front x D) Net weight (including mounting bracket) 100 Hz­10 kHz -- -- 30 W -- omni (underwater) -- special type -- -- 8 -- waterproof cable 183 mm [diameter] x 66 mm [D] (7. 19" [diameter] x 2. 61" [D] ) 1. 8 kg (4 lbs. ) S-40 85 Hz­20 kHz (+/- 3dB) 85 dB 113 dB 160 W 640 W 100° x 100° 9. 8 dB (+3. 8/-3. 6 dB) 2 kHz­20 kHz 5. 25" 1" Softdome 3, 500 Hz 4 3. 7 spring terminal 249 x 178 x 150 mm (9. 8" x 7" x 5. 9") 2. 6 kg (5. 7 lbs. ) 46 Components Woofers EV component woofers are high-efficiency designs highly refined from years of development and field experience. They employ extended-length voice coils for high-impact reproduction of dynamic low-frequency program. All woofers feature proprietary heat-transfer systems for unmatched power capacity and reliability. Kevlar®-fibercomposite cones are used to provide structural strength to resist collapse during explosive dynamic peaks and to provide internal mechanical damping to minimize resonances that can change the character of the sound at high levels. Real-time controlling and configuration is either via the front panel or PC via RS232, MIDI or RS-485 bus for networking. RS-485 RS-232 realtime controlling NRS 90246 up to 1000 meters Dx 38 Controller type Data format 2 (+1) in/4 out 24-bit linear AD/DA conversion 48-bit processing 24-bit/sigma-delta (linear phase) 128 times oversampling 24-bit/sigma-delta 128 times oversampling 48 kHz 2 x 24-bit Motorola 20 - 20 kHz (- 0. 5 dB) 115 dB < 0. 01% < 0. 05% 2 XLR (elec. balanced), parallel out 1. 55V/+ 6 dBu 24. 5V/+30 dBu 20k ohms > 40 dB 4 XLR (elec. balanced) 1. 55 V/+ 6 dBu 8. 7V/+ 21 dBu < 100 ohms 600 ohms 6, 12, 18, 24 dB/oct. Butterworth, Bessel, Linkwitz-Riley 26 (full) parametric equalizers, Low-Shelving EQ (6, 12 dB slope), LPN (Lowpass-Notch) switchable, Hi-Shelving EQ (6, 12 dB slope), Lo-Cut filter (6 or 12 dB slope), B6 alignment, Hi-Cut filter (6 or 12 dB slope), All-Pass filter (1st or 2nd order), Phase invert (180°) 4 (1 each output) with graph 4 (1 each output) with graph 3 master delays (2 ms - 900 ms) 4 channel delays (0 ms - 900 ms) 21 µsec. Data dump, Master/Slave operation, Remote Control 122 x 32 dots via key-lock 483. 0 x 43. 6 x 374. 0 mm 1. 72" x 19" x 14. 75" 5. 0 kg (17. 03 lbs. ) Remote panel A/D conversion D/A conversion Sampling rate DSP type Frequency response Dynamic Range (typical) THD (without input transformer) THD (with input transformer) Input connectors Input voltage (nominal) Maximum input voltage Input impedance Common mode rejection Output connectors Output voltage (nominal) Maximum output voltage Output impedance Minimum load impedance Frequency crossovers (slopes) Frequency crossovers (designs) Filters (In- and Outputs) Dx Network (up to 31 Controllers) WWW Software update download RS-485 Remote Interface for Dx38 Available Options and Accessories: NRS 90244 NRS 90247 NRS 90246 Input transformer RS-485 network interface Contact Closure interface for external "User preset" selection; 8 contacts (pin 1-8: activation, pin 9: common) Digital Compressor Digital Limiter Delay Delay increment MIDI in/out/thru Graphic LCD with LED-background light Locking function Dimensions mm (WxHxD) Weight net 55 RACE Software RACE Software for Dx38 RACE is a professional audio tool to generate presets for speaker systems. In addition to the clear display of all used filters, delay and level settings, each output can be assigned with the acoustic data (phase and frequency response) of the individual speaker component. This pure speaker data has been measured in free space. RACE then calculates the complex summation of all used filters, level and delay settings applied to these components. Thus the display on the screen is not only the electrical filter response but, for the first time, the actual true acoustic response of the component!Any change of parameter values is visible and audible in real time. An additional tool is the SPL dispersion window for lower frequencies. [. . . ] In explanation: A job for MH 4020 which provides 146 dB maximum. And others. . . Dispersion Angle distance for same coverage angle versus distance for same coverage Dispersion 12. 5m (41. 01') 25m (82. 02') 50m (164') 75m (246. 1') 100m (328. 1') (246. 1 ft) - 22 db B - 28 dB - 34 dB - 37. 5 dB Inverse square law (point source) - 40 dB 89 Inverse Square law (point source) Microphone Technologies In 1934, Electro-Voice invented the hum-bucking coil for microphones, still an industry standard almost 70 years later. The invention was the beginning of EV's success in building microphones, but not the end. Electro-Voice continues to set new standards for microphone design today. [. . . ]