User manual ELECTRO-VOICE 81PMX
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Manual abstract: user guide ELECTRO-VOICE 81PMX
Detailed instructions for use are in the User's Guide.
[. . . ] 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. [. . . ] Underwater speakers are required equipment for many activities in commercial, luxury resort pools and synchronized swimming events or instructions in Olympic pools. UW 30 has a highfidelity sound with low distortion, and the effect of music played underwater through it is truly enchanting. 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. 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.
· · · · · 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.
· · · · · · · 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
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. )
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. )
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. 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. )
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
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. 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!An additional tool is the SPL dispersion window for lower frequencies. Presets can even be prepared off-line in advance and need only a little tweaking once speakers are in place. RACE enables engineers to seamlessly integrate room influence, speaker positioning and parameter settings and a RACE Processed Preset is a guarantee for a solid, accurate basis from which to begin system tuning. EV is supplying these presets for all current EV speaker systems, even if the needed combination is not part of the 50-factory preset of the Dx38.
Signal Flow Diagram The signal flow diagram provides a clear overview of all available parameters. Immediately after the input metering there are five master equalizers per input available. [. . . ] Furthermore (based on point 3): "What´s the loss of SPL in both cases?" Solution: Approx. To achieve a pre-determined SPL of 105 dB, when an area of 75 meters needs to be covered, the 120 degrees system has to deliver > 130 dB and the 40 degrees system > 145 dB. 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
Inverse Square law (point source)
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. [. . . ]
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