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Take a look at the October Danley Sound Labs newsletter to read about amps, Tech Topic, the awesome J3-94 and more.  You will also be able to learn about the corporate culture of Danley Sound Labs.  Feel free to reply with any questions or if we can be of service. 

The New J3-94:  Hearing Is Believing

Danley J3-94 speech at 600ft
Who needs lots of speakers when you can do 15,000+ with one top and two subs? This video features the new J3-94 that debuted this year and BC218s. The speakers are positioned at the far end of the field and the open microphone is on the field around the fifty-yard line. The performance of the Jericho product simply must be experienced to be believed.
Team Member of the Month
Rocky Gianetta of Layer 8
Layer 8 is the authorized representative for Danley Sound Labs in northern California. Rocky Gianetta, president of Layer 8, has taken their territory to great heights; growing it this year by 250% so far and still rising. His relationships and knowledge of design work have taken that region from one of the lowest regions in sales to the top in 1 year! ... And it keeps growing....

www.layer8inc.net
Danley Sound Labs' Mission Statement,
Core
Values and Vision Statement
 
The Danley team recently spent a morning in the Gainesville office revising, writing and adopting our corporate mission statement, core values, and vision statement.  It is our hope that these items are more than simply words on paper, but that they truly define who we are as a company and guide our day to day operation.  Over the next few months, we'll take a brief look at each individual component. 

We begin with the Danley Sound Labs' mission statement.  A mission statement should serve as the foundation upon which the company is built, express a present reality, answer the question, "What do we do?"  Here at Danley, we "Desire to find favor and a good name in the sight of God and man through innovative loudspeaker solutions."  This statement truly is a foundation for our company.  It clearly answers the question: "Why do we exist?"  We always want to operate in a way that finds favor, not disfavor, and a good name, not a bad name in the sight of God and people.   This is a present reality for Danley.  We do it by building the most innovative, excellent loudspeakers we can.
Next month, we'll talk Core Values.

DNA Series with Ethernet Control
The DNA series products from Danley Sound Labs can be connected to an Ethernet network and controlled by a computer connected to the same Ethernet network. The DNA SC48, DNA 10K4 Pro, and DNA 20K4 Pro devices all connect directly to the Ethernet network via the built-in Ethernet interface. The DNA 5K4c connects to the computer with a USB connection by default, however, there are a couple different options available to interface the DNA 5K4c with an Ethernet network. One of those options also includes Dante Audio over Ethernet.
 
The convenience of being able to control one or more amplifiers over the Ethernet connection is a powerful feature. It means that a person is not required to be present at the amplifier rack to make adjustments to the amplifier’s built-in DSP, at the front of an external DSP, or even at a computer that is connected to a DSP by USB. The operator can take their computer out into the listening area and hear the adjustments they are making while they are making them. Further, by adding a temporary WiFi access point to the Ethernet network, it is possible for the operator to move about the listening area with ease and not be otherwise encumbered by wires and cabling. This is especially useful in larger venues which may require relatively long distances.
 
Another very handy feature of the PodWare software is the ability to build logical groups out of either devices or modules on the network. This means that it is possible to have one set of amplifiers for the Left side of the system and another set of amplifiers for the Right side of the system. Then, it is possible to logically group the respective amplifiers and have the ability to apply gain, delay, and EQ adjustments across all the amplifiers in that group at the same time. Also, one device can be part of more than one group. So in addition to the Left and Right groups, it is possible to add a group just for Subs, another for Delay Ring 1 and even add them all together for Entire PA. This feature exploits the Ethernet connectivity to bring together the distributed processing in all the networked devices into a simple and easy to use user interface to operate the complete system.
 
The current version of PodWare is 6.22.10. This version is available for download from our website:
http://www.danleysoundlabs.com/dna-podware/
The current version of firmware for the DNA 10K4 Pro and DNA 20K4 Pro amplifiers is 1.218.
The current version of firmware for the DNA SC48 is 1.362.
The firmware is included in the PodWare download zip file for PodWare 6.22.10.
STIPA Workshop
There is a change on the horizon that may have a significant impact on those of us in the audio world.  Back in 1983, the Life Safety Code, called NFPA 10, was changed to require that there be voice alert systems to tell the occupants of a building that there is some sort of emergency and they need to get to safety.  Recently, language was added to the Code that required that the voice be “intelligible”.  Of course, this is open to interpretation.  In the next edition of the Code, most experts expect that there will be a requirement that the intelligibility of the voice alert system be measured using a technique known as STIPA.  We at Danley have prepared a workshop designed to bring you up to speed on intelligibility and STIPA.  It has been accepted for INFOCOMM continuing education units.  If you are interested in attending a workshop in your area, please contact us here at Danley.
 
Tech Corner
Power ratings of speakers and amps part 1
The accurate rating of loudspeaker power handling is one of the trickiest parts of loudspeaker building and marketing! On the surface, it seems like this should be simple.  When you buy a light bulb, it has a rating.  A 100-Watt light bulb dissipates 100 Watts.  Why doesn’t a loudspeaker do the same? Well, there are some very important differences between a light bulb and a speaker.  First, the rating of a light bulb is a rating of how much power it dissipates. Remember, power measured in Watts is a measure of how much work is done. So, in a 100-watt light bulb, 100 watts of power is spent or dissipated: some transformed to light; some to heat.  The rating of a speaker, on the other hand, is a rating of how much power it will dissipate before it blows up!

First, let's examine the rating of the light bulb.  In the US, light bulbs are designed to work with a voltage of approximately 120 VAC, 60 Hz. If you stop and think about it, that is a really high-level audio signal. You see, with a light bulb, the signal does not change very much.  It is going to be about 120 Volts and the frequency is going to be 60 Hz.  So if the filament impedance at 60 Hz is known, then it is quite simple to come up with a rating.  Using Ohms law, if the impedance is 144 ohms and the voltage is 120,then P=V^2/R or  P=14400/144 or 100 Watts.  Simple! But when was the last time you played your speaker at a constant voltage with a single frequency?  That would be pretty boring stuff!

Audio signals have a wide range of voltages and frequencies.  What makes it even more complex is that loudspeakers do not have one value of resistance.  We talk of an “ 8ohm” speaker but in reality that is not quite true.  Below is a graph of the impedance  (resistance that changes as a function of frequency) of a woofer. 



The Y axis is Ohms and the X axis is Hz.  By the way, this is an “8 Ohm” speaker, but you won't find 8 Ohms anywhere on this curve!  The minimum is actually 9 Ohms, but you can’t sell a 9 Ohm speaker!  No one has ever heard of such a thing.  So you call it an 8 Ohm speaker and everyone is happy! But think for a moment what this means about power.  If we apply 10 VAC to this speaker, (assuming that it will handle a 10 volt signal), at 40 Hz the resistance is 14 ohms.  The power would be P=V^2/R or 7.14 Watts.  At 70 Hz the power would be 2.3 Watts, at 140 Hz the power would be 11 Watts and at 1000 Hz the power would be 4.2 Watts.

So how much power does this speaker dissipate?  That is a very good question!  Stay tuned for more! 
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