Dynacord Stereo System manual When To Specify Mixer/Amplifiers

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originate, and from what type of interface? The answers to questions such as these will help to determine the input configurations of the unit.

Similarly, take a look at the expected load requirements. For example, how many loudspeakers will be needed to adequately cover the space and assure good intelligibility? What type of loudspeakers will best serve the application: ceiling speakers, wall speakers, paging projectors, or a combination of different elements? Will 25V or 70.7V distribution be necessary, or is a direct voice coil connection sufficient? Must the system handle multiple independent zones? Such factors will determine the power output required of the unit.

Additional elements to consider include the level of ambient noise and reverberant characteristics of the space, along with the frequency response of the sources and loudspeaker elements; these will affect the audio quality of the system. Packaging also should play a part in your design. Must controls be user-adjustable, for example, or should they be tamper-proof? Will the mixer/amplifier be rack-mounted with other equipment? Must the system operate in a dusty or moist environment, or where users will have dirty hands or be inexperienced? Finally, remember the bottom line: what percentage of the cost of materials sold on the job is represented by the cost of the unit? Once you have initially specified the requirements of the system, you can narrow down your choice of mixer/amplifiers for the job.

ElectroVoice offers two mixer/amplifiers designed to suit a wide variety of sound contracting needs. The MA1212 or 1206 units are mixer/amplifiers with either 120 or 60-watt output capabilities. Mountable on a shelf or in a rack, these units accommodate up to 12 different input sources to permit larger complex configurations with off-the-shelf convenience. Tone controls are provided, along with outputs to drive supplementary systems such as booster amps or tape recorders.

When To Specify Mixer/Amplifiers

The performance of integrated Mixer/Amplifiers is more than adequate for the vast majority of distributed sound installations.

Consider, for example, the question of frequency response. The MA models exhibit a low- frequency limit of 50 Hz, and an upper-frequency limit between 15 and 20 kHz. Is this good enough? To answer this question, we need to examine the performance of other components in the signal chain.

Let’s examine the response of a typical 8-inch ceiling speaker in a 1.8 ft3. sealed box. At the low end, the unit begins rolling off below about 150 Hz and is nearly 20 dB down by 50 Hz. Its response also rolls off above 5 kHz, and is nearly 10 dB down at 20 kHz. Paging projectors, used in a wide variety of industrial applications, will introduce even more severe response limitations, along with greater harmonic distortion.

Similar conditions apply at the system input. Background music players and FM stations, for ex- ample, are limited to the bandwidth from 50 Hz to 15 kHz, at best. Push-to-talk paging microphones, such as the ElectroVoice US600EL, are tailored for the voice range and thus feature far more limited frequency response. Telephone paging lines are further limited in response, and can introduce greater distortion.

Remember that using an amplifier with significantly wider bandwidth than the signal source and/or output devices will serve primarily to increase noise and distortion in the system. An amplifier which reproduces low frequencies below 200 Hz when driving a paging projector with a 300 Hz to 500 Hz lower cutoff will be wasting power (reducing headroom in the pass-band) and may cause intermodulation distortion if not premature failure in the paging projector. In this context, the audio specifications of the utility units in our example begin to look appealing. In fact, whenever the program source, paging mic or loudspeaker system exhibits limited bandwidth, there is a diminished need for an audiophile-quality mixer/amplifier system. The majority of practical installations fall within this category. In professional buildings, office structures, warehouse paging

ElectroVoice/Dynacord BGM Guide

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Contents Paging/Background Music Systems Disclaimer & Copyright Table Of Contents Analyzing the Application When To Specify Mixer/Amplifiers Business Audio Business EV has ALL the Perfectly Positioned ProductsElectroVoice/Dynacord BGM Guide EV Business Audio Product Guide Evid Surface Mount Speaker SystemsEvid Ceiling Mount Speaker Systems Evid Ceiling Speaker Solution Why is it Different?Outdoor Ready Construction Evid 4.2, 8.2 and 8.2L Full Range Models with Punch EV Raw Frame Ceiling Speakers10.1 Finally a Compact True Ceiling Subwoofer EV Amplification Products MA Series Mixer AmplifiersCPS Series Power Amplifiers EV Commercial Power AmplifiersPrimary Features ProAnnounce Digital Routing System Key CPS Amplifier Product FeaturesOverview Basic System Components ProAnnounce DP Series Power AmplifiersAudio Routing Made Easy Basic Business Audio System Design Guide What to Recommend?Determine the Acoustic Requirements Conduct a Preliminary Layout and Walk ThroughAssemble the Equipment List Expect The UnexpectedCeiling vs. Surface Mount Systems Speaker SelectionStandardizing for Profitability Selecting & Positioning Ceiling LoudspeakersCeiling Speaker Coverage Converting Coverage Specs to a Layout An Example of Coverage Pattern vs. Speaker SizeWhen Controlled Coverage is Needed Use of SubwoofersPositioning Subwoofer Components Choosing the Best Mixer/AmplifierAnalyzing the Application When To Specify Mixer/Amplifiers DPM4000 4x4 Matrix Router When the Job Calls For ProAnnounceDRM4000 vs. the DPM4000 DRM 4000 MixerSignal Generators / Voice Message Memory Volume And Tone Controls / DelaysControl Inputs And Outputs Macros Clock / CalendarMonitoring InterfacesStation Control Consoles Understanding DCS Expansion OptionsBGM and Paging System Designs DCS 400 Expansion ChassisBGM Installations System Examples Retail Store Single ZoneOffice Building 5 Zone Simplified system Layout OverviewBar-Restaurant 2 Zone Quipment ListHealth Club 4 Zone Speaker SystemsRetail Clothing Store -2 Zone Proannounce EquipmentRetail Book/Record Store -3 Zone Retail Bookstore Equipment ListLarge Department Store 6 Zone Basic Warehouse 5 Zone Multi-Use Warehouse, Factory & Office Facility 15 Zone Speaker Systems Proannounce EquipmentAppendix a Distributed Audio Systems a Primer Why Is It Called Constant Voltage?What Are the Advantages to Constant Voltage Systems? Amplifier Bridging Single-Channel Direct DriveUse of Autotransformers

Stereo System specifications

The Dynacord Stereo System is a remarkable audio solution designed for audiophiles and professionals seeking superior sound quality and versatility. Renowned for its exceptional engineering, Dynacord emphasizes clarity, power, and precision in all of its products, and this stereo system is no exception.

One of the standout features of the Dynacord Stereo System is its advanced digital signal processing technology. This allows for precise tuning of audio output, ensuring that users experience optimal sound quality regardless of the input source. The system includes various presets tailored for different environments, whether it’s a small room or a large auditorium. This flexibility makes it ideal for both personal and professional settings.

Another significant characteristic of the Dynacord Stereo System is its robust build quality. Constructed from durable materials, the system is designed to withstand rigorous usage, making it a reliable choice for mobile DJs, event organizers, or even studio applications. Additionally, the aesthetics of the system are both modern and stylish, fitting seamlessly into any décor.

The Dynacord Stereo System also features a powerful amplification system. With a high output capacity, the system delivers rich, dynamic sound that fills the space without distortion. It supports a wide frequency range, allowing users to enjoy everything from deep bass to crisp highs, making it versatile for various music genres.

Connectivity is another strong point of the Dynacord Stereo System. The system is equipped with multiple input options, including Bluetooth, USB, and traditional analog inputs, offering convenience for connecting various devices such as smartphones, computers, and instruments. The Bluetooth capability also allows for seamless wireless streaming, further enhancing its usability.

In addition to its audio performance, the Dynacord Stereo System includes user-friendly controls and settings. The intuitive interface allows for easy adjustment of volume, tone, and effects, making it accessible for users of all experience levels. Whether you’re a casual listener or a seasoned sound engineer, the Dynacord system caters to all.

In conclusion, the Dynacord Stereo System stands out with its exceptional sound quality, durable construction, versatile connectivity options, and user-friendly features. This system is not only designed to meet the needs of audio professionals but also aims to enhance the listening experience for everyone. Whether at home, a concert venue, or on the go, the Dynacord Stereo System delivers a powerful performance that truly elevates audio enjoyment.
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