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Reinventing the Loudspeaker

 

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Emerald Physics uses a boxless design approach called open-baffle dipole in order to achieve several important improvements over conventional loudspeakers:

  • Eliminates box sound – preserves the pitch and harmonic beauty of instruments.
  • Eliminates deep bass limits – Flat response to 20Hz with 2.75 inch thick baffle.
  • Eliminates impedance swings – Maintains same impedance curve as raw woofer.
  • Eliminates large expense of box enclosure – typically the most expensive component in the speaker.

 

Eliminating the Room
Emerald Physics has developed a method to control a speaker’s dispersion pattern in order to minimize room interactions and thereby eliminate most of the room’s sonic signature. Our patent-pending BDC (Broadband Directivity Control) technology is a turning point in the history of loudspeaker design. Until now, speaker / room interaction has been one of the major problems in home audio systems. Conventional speakers have wide dispersion and an omnidirectional pattern in the bass range, sending large amounts of sound energy toward the room boundaries, which are reflected back into the listening space with a time delay. These are known as early reflections, which color the sound of the original signal. The omni-directional bass pattern also excites room resonances in all three axis which tends to cause the boomy, ill-defined bass commonly experienced in many systems. The solution is to create a speaker with a more narrow dispersion pattern as well as a more consistent dispersion angle across the frequency spectrum. Listening to mainly the loudspeaker’s direct field eliminates most of your room’s sound, creating a consistent and natural playback performance even in difficult rooms.


Eliminating the Large Peaks and Valleys in Frequency Response
Most loudspeaker systems are rated at plus or minus 3dB. This equates to a 6 dB range at any give area in the frequency response as measured in an anechoic chamber. Once placed in a listening room, it is not uncommon to see 20 dB variations. The CS2.3MK2 exhibits an extremely accurate response of plus or minus 1 dB from 100 Hz to 20,000 Hz. This high level of accuracy is achieved through the use of the included signal processor, which provides equalization via our custom software. Multiple preset files allow configurations to be chosen for specific room placement locations for optimum performance in most any room.

Eliminating Intermodulation & EMF Distortion Products
When a speaker system uses just one channel of amplification to drive multiple speaker devices, additional distortion is produced in the audio reproduction chain. Some of this distortion is due to the amplifier trying to produce a wide bandwidth of information and some of the distortion is a by-product of the electro-motive force (EMF) produced by the speaker cone which is sent back to the amplifier. The CS2.3MK2 uses bi-amplification to substantially reduce both the EMF distortion and the IM distortion produced in most systems. The use of a digital electronic crossover in the bi-amping path, allows the speaker driver and amplifier dedicated to that driver to only amplify the frequencies needed for that driver. By having one amplifier responsible for the low frequencies and one amplifier responsible for the high frequencies, the amplifier for the tweeters does not reproduce low frequencies and the low frequency amplifier does not try and reproduce high frequencies. This makes both the tweeter and woofer amplifiers cleaner and more efficient in reproducing music.

Eliminating Dynamic Compression
In a perfect world, a speaker would be able to play as loud as required with totally accurate tracking of the musical information as it gets louder. Unfortunately, in the quest for low frequency performance, many speaker designs sacrifice dynamics and efficiency for low bass response. This lack of efficiency creates a sound field that does not always reproduce each bit of musical information correctly. It is one of the reasons that many speaker systems sound out of balance when they play loud or the speaker is required to reproduce a large musical peak. By using several techniques including very efficient professional speaker components, multiple 15” woofers, coaxial midrange / compression tweeters and bi-amping, efficiency is maximized. This not only makes the speaker system efficient, it also maximizes the use of power from the amplifiers by requiring each amplification channel to only amplify those signals needed by the speaker driver it is connected to.

 

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