Emerald Physics CS 2.3 Show pair

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This pair was only used at the California Audio Show 2010. Please call with questions-Mike 831-423-5523 CA.

These speakers are designed to be bi-amped. I am open to a "package deal" including the Parasound 2250 also on sale.

The second generation CS2 is here! The new CS2.3 is another radical step forward and a worthy successor to the legendary CS2. With its new 12" point source professional driver system, the CS2.3 is now a true 3-way, bi-amplified, dipole speaker design. Cutting edge sonic performance establishes a new level of realism and dimensionality.

The innovation continues in the Bass range with our new Aperture Bass Propagation technology. This proprietary system is used for both 15" dipole woofers, improving low frequency power and linearity, while retaining all the speed and articulation of the original CS2. DSP equalization and active crossover functions are provided by the included Behringer DCX2496 Digital Processor.

CS2.3 Product Specifications

* Type: 3-Way, Active, Dynamic Loudspeaker
* Dipole below 900Hz, Monopole above 900Hz
* Controlled directivity design, DSP controlled
* Concentric midrange/treble driver assembly
* Impedance: 4 Ohms
* Treble Driver: One 1 inch (25mm) exit professional compression driver
* Midrange Driver One 12 inch (300mm) diameter Coaxial professional driver
* Bass Drivers: Two 15 inch (380mm) diameter professional woofers - pulp fiber cone
* Sensitivity: 97 dB 2.83V @1M @ 1kHz
* Crossover:
o Mid/Treble: 900Hz Butterworth 3rd Order - Internal Passive network
o Bass/Mid: 100Hz Linkwitz-Riley 8th Order - DSP based active network
* Amp Configuration: Bi-amplified ( amplifiers not included)
* Signal Processing: Outboard 4 channel DSP (digital signal processing) unit
* Emerald Physics proprietary software pre-loaded
* Frequency Response: 20Hz - 22kHz -3dB (with DSP correction)
* Amplitude Linearity: 100Hz-20kHz +/- 0.5dB

Optional -Cherry Veneer

Dimensions:
Height: 48 inches (1220mm)
Width: 18.5 inches (470mm)
Depth: 2.75 inches (70mm) Baffle
8 inches (203mm) Total Depth
Net Weight: 73 lbs (33kg) each
Shipping Weight: 89 lbs (40.5kg) each

Reinventing the Loudspeaker

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 Box
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 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 20dB variations. The CS2.3 exhibits an extremely accurate response of plus or minus ½ 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 CS2.3 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.

Eliminating the Need for Expensive Electronics and Cables
The CS2.3 is a very accurate reproducer of sound. Many speakers, due to their designs, require the need for very expensive electronics to achieve satisfactory performance. Conventional designs have problems with the impedance of the drivers due to mechanical and electrical resonances and the passive crossovers used. As mentioned earlier, passive crossovers are power-robbing components. The CS2.3 maximizes power transfer. With bi-amping and the 48 dB slope of the digital crossover, the listener utilizes all of the power available from the amplifier. The high frequencies are not harsh or strident and therefore, the need for a softer sounding tube amplifier is not required for the tweeters. The need for expensive cables that filter out high frequency information is also not required. The need for 200 pound amplifiers with huge power transformers is not necessary since the CS2.3 is very efficient and does not require the large amounts of power that expensive amplifiers offer into low impedances. In fact, you may find that you will spend hundreds of dollars per channel rather than thousands of dollars per channel to drive the CS2.3.

These were used with a Cullen Modified ($900) Behringer. Note that they are the original 2.3s and can not be upgraded to the 2.7.

Mike www.HighValueAV.com 831-423-5523 Paypal 3%