M`elodie
The Melodie loudspeaker is a self-powered, three-way design featuring drivers designed and manufactured at Meyer Sound's Berkeley, California, factory.
The low/low-mid section features two high-power,neodymium-magnet, 8-inch cone drivers with 1.5-inch voice coils, created to meet the power requirements of the system. The drivers are a proprietary design employing neodymium magnets for higher efficiency and power handling with reduced weight.
The lowest frequency range is reproduced by these high-power drivers working in tandem, each powered by a dedicated amplifier channel. To assure the smoothest response in the critical midrange and crossover region, M'elodie incorporates a complex active crossover design.
For low frequencies, both drivers work together, but in the low-mid frequencies only one of the two 8-inch drivers is active. This technique eliminates interference between the drivers that would otherwise occur at shorter wavelengths, while at the same time maintaining optimal polar and frequency response characteristics at the crossover frequency.
The high-frequency section uses a 1.2-inch exit, 3-inch diaphragm compression driver with a neodymium magnet, powered by a dedicated amplifier channel. The output of the driver is coupled to a 100-degree (horizontal coverage) constant-directivity horn through a custom REMmanifold.
The REM is a patented coupling device that introduces driver output to the horn throat across a very short path,effectively controlling the dispersion characteristics, but with dramatically reduced distortion in comparison to other techniques.
700-HP
Ultra High-Power Subwoofer
- Stackable
- Flyable using optional rigging kit
- Extremely low distortion for ultimate low-frequency clarity
- Very high peak power yields excellent transient reproduction
- Ultra-efficient neodymium magnet drivers
- Transportable in blocks using optional heavy duty caster frame
The Meyer Sound 700-HP ultra high-power subwoofer sets a new standard for the power-to-size equation. The 700-HP`s power and bandwidth handle high continuous operating levels and extreme transient information with minimal distortion in its operating frequency range.
Meyer Sound's rigorous design approach has been applied to extract the greatest efficiency from every part of the system, resulting in the 700-HP's effortless reproduction of low frequency transient information. As a self-powered system, the transducers, amplification and control electronics of the 700-HP are created as a symbiotic system that optimizes performance and maximizes its tremendous power.
The operating frequency range of 28 Hz to 150 Hz complements other Meyer Sound loudspeakers and line and curvilinear arrays in sound reinforcement applications requiring maximum headroom at the low end of the frequency spectrum.
The 700-HP`s efficiently tuned cabinet houses two Meyer Sound-designed and -manufactured back-vented, long-excursion, 18-inch cone drivers. Each driver features a 4-inch voice coil and is rated to handle 1200 AES watts. The drivers have also been engineered for extreme efficiency, using high-gauss neodymium magnets for the most powerful magnetic field strength. High magnetic field strength increases the driver's sensitivity, which yields greater output, while keeping heat dissipation requirements within operational tolerances.
An integral two-channel class AB/H amplifier with complementary MOSFET output stages supplies total peak power of 2250 watts (1125 watts per channel). With twice the amplifier power of the 650-P subwoofer, the 700-HP produces an average of 3 dB more overall SPL, with enormous headroom to accommodate the most extreme demands with ease. Recent tests conducted by Meyer Sound show the 700-HP producing significantly higher output than other "high-power" subwoofers.
The amplifier, control electronics and power supply are integrated into a single, field-replaceable module mounted in the rear of the cabinet. The cabinet is constructed of multi-ply hardwood and coated with a textured black finish. Integral metal grilles lined with acoustical black mesh protect the cone drivers. Designed mainly for stage or ground placement, the stackable 700-HP includes plastic skids on the bottom of the unit, preventing damage to the enclosure or the unit below. The skids align with slots on the cabinet's upper surfaces ensuring secure, aligned stacking. For maximum convenience in touring situations, the 700-HP can even travel in stacks on the MCF-700 caster frame.
The 700-HP is truck-smart, with exterior cabinet dimensions suitable for both European and US truck widths. An optional QuickFly rigging kit is available, installed at the factory or as a field upgrade. Up to 10 cabinets can be suspended from the optional MTG-700 top grid in a straight hang at a 7:1 safety factor.
Options available for the 700-HP include weather protection and finishes in custom colors for fixed installations and other situations requiring specific cosmetics.
An optional RMS remote monitoring system module allows comprehensive monitoring of all key system parameters on any RMS-equipped host PC. In addition, Meyer Sound's MAPP Online multipurpose acoustical prediction program allows quick prediction of coverage, frequency response, impulse response and maximum output of the 700-HP and other Meyer Sound loudspeakers and loudspeaker systems.
Applications
- Stadiums, arenas and concert halls
- Medium-to-large theatres and clubs
- Theme parks
- Cinema
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Used Meyer Sound Laboratories
Meyer Sound Laboratories is an American company based in Berkeley, California that manufactures self-powered loudspeakers, multichannel audio show control systems, electroacoustic architecture, and audio analysis tools for the professional sound reinforcement, fixed installation, and sound recording industries.
The company’s emphasis on research and measurement has resulted in the issuance of dozens of patents, including for the now-standard trapezoidal loudspeaker cabinet shape. Meyer Sound has pioneered other technologies that have become standard in the audio industry, including: processor-controlled loudspeaker systems, self-powered loudspeakers,curvilinear arraying, cardioid subwoofers, and source independent measurement.
Meyer Sound has consistently involved itself with advanced research beyond that connected to immediate product development, sometimes in conjunction with arms of the University of California, Berkeley. Some of this research has resulted in unusual products such as their parabolic sound beam and sound field synthesis loudspeakers. Other projects, such as the spherical loudspeaker research underway by Meyer Sound and CNMAT (Center for New Music and Audio Technologies) at UC Berkeley are still in the stage of pure research.
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Octave: The difference between two frequencies where one is twice the other. For example, 200 Hz is an octave higher than 100 Hz. 400 Hz is one octave higher than 200 Hz.
Optical Digital Cable: Fiber optic cable that transfers digital audio signals as light pulses.
Outcue/Outq/Out-Point: These words all refer to the final few seconds of audio signifying the conclusion of the production.
Package: A completed and fully edited audio piece.
Passive: Not active. A passive crossover uses no external power and results in insertion loss. A passive speaker is one without internal amplification.
Phase: Time relationship between signals it’s all relative.
Power Output: A measure, usually in watts, of how much energy is modulated by a component.
Preamplifier: A control and switching component that may include equalization functions. The preamp comes in the signal chain before the amplifiers.
Pre Outs: Connectors that provide a line-level output of the internal preamp or surround processor.
Pre Outs/Main Ins: Connectors on a receiver that provide an interruptible signal loop between the output of the internal preamp or surround processor portion of the receiver and the input of the amplifier portion of the receiver.
Pre/Pro: A combination preamp and surround processor.
Processors: Anything that processes an incoming signal in some way. Surround processors, for example, can decode a Dolby Digital signal to send to an amp so you can hear it.
Pulse Code Modulation: (PCM) a way to convert sound or analog information to binary information (0s and 1s) by taking samples of the sound and record the resulting number as binary information. Used on all CDs, DVD-Audio, and just about every other digital audio format. It can sometimes be found on DVD-Video.
Q-and-A: Question and answer session.
Receiver: Any component that receives, or tunes, broadcast signals, be it NTSC, HDTV, DBS, or AM/FM radio. Typically refers to the single component that includes a preamp, surround processor, multichannel amplifier, and AM/FM tuner.
Reverberation: The reflections of sound within a closed space.
RF: Radio Frequency. Television signals are modulated onto RF signals and are then demodulated by your television’s tuner. VCRs and DBS receivers often include channel 3 or 4 modulators, allowing the output signal to be tuned by the television on those channels. Also, laser discs used an RF signal for modulating Dolby Digital 5.1 soundtracks on some movies. This requires an RF demodulator (usually referred to as an AC3-RF demodulator) before or in the surround processor to decode the signal.
RMS: Root Mean Square or the square root of the arithmetic mean (average) of the square’s set of values. A reasonably accurate method of describing an amplifier`s power output.
SACD: Super Audio CD. Enhanced audio format with up to six channels of high-resolution audio encoded using DSD. Requires an SACD player. Multichannel also requires a controller with six-channel analog or proprietary digital inputs for full playback.
Sampling Frequency: How often a digital sample is taken of an analog wave. The more samples taken, the more accurate the recording will be. You need to sample at a minimum of twice the highest frequency you want to capture. For example, the 44.1-kilohertz sampling rate of a CD cannot record sounds higher than 22.05 kilohertz.
Scener: A radio report in which the announcer is recorded at the same time and place as the background sound of an event.
Sensitivity: A measurement (in dB) of the sound-pressure level over a specified frequency range created by a speaker driven by 1 watt (2.83V at 8 ohms) of power with a microphone placed 1 meter away.
Signal-to-Noise Ratio: A comparison of the signal level relative to the noise level. Larger numbers are better.
Simultaneous Interpretation: This system allows attendees to hear the meeting in their own language.
Sound Bite: A portion of audio of someone speaking.
Sound field: The total acoustical characteristics of a space, such as ambience number, timing, and relative level of reflections ratio of direct to reflected sound RT-60 time etc.
Soundstage: The area between two speakers that appears to the listener to be occupied by sonic images. Like a real stage, a soundstage should have width, depth, and height.
Speaker: A component that converts electrical energy into acoustical energy.
SPL: Sound-Pressure Level. Measured in dB.
Subwoofer: A speaker designed to reproduce very low bass frequencies, usually those below about 80 Hz.
THX: Certification program for home theater equipment. Uses some proprietary features, but mostly assures a base quality level for a given room size. (See THX select or Ultra.) Is compatible with any and all soundtrack formats. Stands for either Tom Holman’s eXperiment, after the engineer who drafted the original standard, or is named after the company’s founder George Lucas first movie, THX 1138. Nobody agrees on which.
THX select: Certification program for speakers and receivers that assures a base level of quality and performance when played in a room that’s between 2,000 and 3,000 cubic feet.
User-Generated Content (UGC): Text, photos, video or audio supplied by the customers of a company.
Voicer: A radio report without background audio taken from a scene or otherwise.
Wrap: A radio report containing both the reporter and an actuality.
Professional used lighting equipment.| Professional second hand lighting equipment.| Professional pre owned lighting equipment.
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Second hand audio gear. | Second hand lighting.
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