Better Sound


The New Look of Sound.”TM

Radically redefining loudspeaker
usage in form and function. 

 Better loudspeaker sound.

Sound professionals ask, “Why do I get muddy voice sound with my loudspeakers?”  Audiences sometimes find vocal presentations are muddled and difficult to listen to.  This problem is so common we have become used to it.

The simple answer is the typical 2-way loudspeaker is designed for making loud sounds, but not for fidelity.  For the requirements of audiovisual applications, fidelity is critical, especially clarity of the voice range, as lecturing and other vocal requirements make up much of the use.  The 2-way loudspeaker has been the standard choice for public address applications, even though the sound quality in the voice range is typically poor, producing muddled voice and varied sound quality across a venue.

The typical loudspeaker.

Why is this so?  Let’s take a look at a typical design for a loudspeaker, a 15-inch subwoofer and a horn tweeter with a 1” throat.  The crossover is designed at 1500hz, so below 1500hz only the subwoofer is designed to operate.  However, due to fundamental physical laws of speakers, a 15-inch subwoofer operates in its effective range only below 100 to 150hz.  So what happens between 150hz and 1500hz?  We know it produces sound—it doesn’t go silent—but what kind of sound does it produce?  This range is way above the effective range of a 15-inch woofer, and the result is many of the problems typical with a cone speaker: excessive beaming and non-linear response.  Is subwoofer is simply not built to operate clearly in this range.

Consequently, for sound frequencies between 150hz and 1500hz, the subwoofer produces a muddy sound that varies across a venue.  As a result, sound professionals in houses of worships or audiovisual settings where voice is a large part of their performance, are puzzled why they cannot get a clear-sounding vocal response out of their loudspeakers.  











                     Figure 1.  The effective operating range of a typical loudspeaker.

 The typical voice.

Now let’s take a look at the typical vocal range.  The frequency range of the human voice is roughly 80 to 1100hz.  For normal speaking, voices would not reach either extreme.  Note where the voice range is compared with the effective operating range of a typical loudspeaker, smack dab in the middle of where the typical loudspeaker operates at its poorest. 


                Figure 2. Vocal range, out of the effective range of a typical loudspeaker. 

As you have likely heard, this produces muddy voice throughout the entire vocal range!  Clarity and intelligibility suffers, putting fatigue into listeners straining to hear clearly.  We’re asking a subwoofer to give us clarity of sound that is way out of its designed range.  To get an idea of what it sounds like, unplug the main speakers from your home entertainment system and try to get full sound from only the subwoofers!  It’s just not going to produce clear sound in the vocal range.  It will sound heavy on the bass—that’s what it was designed to do!  This is why sound professionals have difficulty getting clear voice across a venue with typical loudspeakers, yet often a typical loudspeaker is the only option they have.


Another fundamental problem inherent in traditional loudspeakers is the narrow beam effect.  Sound professionals deal with this problem on a regular basis.  In an audiovisual or DJ setting, the beam effect is dealt with by putting more speakers in a venue than is necessary for sound volume, in order to properly fill all the areas of the room more efficiently.  This means extra set-up requirements for the sound techs. 

Second, in order to get the proper sound volume to the back of the room, the volume at the front of the room is raised, blasting the front rows with a high level of volume.  A compromise must be reached between getting sound to the back of the room and blasting the front, usually with the listeners in the back of the room straining to hear correctly.

Solution found. 

The SoundPanel handily solves these problems.  The SoundPanel has crystal-clear sound across the entire vocal frequency range, without the distortions of typical loudspeakers.  The improved clarity and intelligibility of speech will be noticed by listeners, even at the edges of the room, where sound is often poor.  The SoundPanel disperses clear sound evenly across a venue.  Every listener, no matter where in the room, will benefit from high clarity speech.  No more listener fatigue.

Also, the SoundPanel opens up more setup options than a typical loudspeaker allows.  Due to the great angle of dispersion, you can set the SoundPanels on the sides of a room instead of at the front.  This will place the sound source in the middle of the room, so both the front and back sections will receive the same volume, yet this will not affect the clarity due to the SoundPanel’s strong off-axis response. 

There is a clear alternative.

To sum, for applications where clarity of voice is crucial, the SoundPanel will produce much higher clarity of sound and fill a venue much better than typical loudspeakers.  Also it allows for more creativity in speaker placement.  In fact, the more audio-challenged a room is, the better the SoundPanel responds, when compared with conventional speakers.  Try the Soundpanel in your most audio-challenged venue. 

As an added benefit, the SoundPanel can be covered with artwork, corporate logos, or any graphics you want, to suit visually sensitive settings.  You can now make your audio source disappear into your décor and functionality.

The clear response in the vocal range and the ability to decorate the SoundPanel makes it the superior choice for audiovisual applications, houses of worship, and anywhere high clarity sound and visual appeal are required. 

Try our 30-day money back guarantee and discover clear audio for yourself!

Many thanks to: as the source for much of the educational material and graphics on this page. 

Also for original research by:
 NXT, Stonehill, Huntingdon PE18 6ED, UK, Copyright 1998, NXT, Henry Azima, All Rights Reserved.

    Available exclusively at:        Or, call Dana @ 720-232-0829








































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