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Welcome to the Danley Newsletter.  This month, we have a lot we want to share with you.  So, grab a cup of coffee and enjoy catching up on what's new at Danley Sound Labs.
Pure Groove by Danley Now Available
Pure Groove Sound Systems has announced it has joined forces with Danley Sound Labs to produce a groundbreaking series of professional audio systems, specifically catered to the nightclub and dance music festival markets. Designed by Tom Danley, known for his patented work on loudspeaker designs in world-class facilities globally, the Pure Groove by Danley ‘PGD’ series was created as an unrivaled alternative to the industry standard sound systems currently used by large venues and music festivals. 

Specifications and CAD files are now available HERE
Here's a video from our friends over in the Netherlands, 
Danley Gives Back
Chad Edwardson, director of engineering at Danley Sound Labs, has established a summer-time tradition.  The first Friday night of the month during the summer, you will find Chad serving as sound engineer at "Friday Night Music in the Park."  This six-month schedule of outdoor concerts in Dahlonega's beautiful Hancock Park is free to the public and is every first Friday, May through October.  Chad volunteers his services to help his local community.

Chad not only runs sound for the series, he also performs on occasion.  He typically sets up a Danley rig consisting of two SM80's and two THMINI15's, all powered by DNA Amplifiers.  This set up easily covers the audience area of 150' x 150'.

"Friday Night Music in the Park" is another example of Danley Sound Labs' commitment to give back to the community.
Team Member of the Month
This month we highlight a Danley team member who works in the Gainesville office.  Jason Spencer's title is "Engineering Support."  However, it probably should be, "Whatever Is Needed Support."  Jason takes technical phone calls.  He handles all of the demo stock for Danley.  He is also responsible for actually putting the newsletter material into newsletter format and sending it out.  Folks here are constantly asking Jason for help with a wide variety of issues: from IT to Photoshop to amps to DSP settings to website maintenance and on and on and on.  When asked to do something, Jason's usual response is, "Sure, I can do that."

Last week, the Danley Gainesville team worked through our new core values.  As a team, we agreed upon Integrity, Service, Innovation, Team, Excellence and Communication.  There is not another person at Danley who more embodies these values day to day than Jason.
Dante technology in DNA Series Products
Dante is a type of real time, multi-channel, uncompressed audio via Ethernet transport. Dante was developed by and is a licensed technology from Audinate. There are many companies who have licensed the Dante technology and have developed products based on it. You can see all the licensees of Dante and many of the available products at Audinate’s website:
Dante is substantially a plug and play technology wherein devices that support Dante are added to a typical Gigabit Ethernet network. Then Audinate’s Dante Controller software is used to patch Dante outputs from one device to Dante inputs on another device.

When you have a system that utilizes Dante in place of individual analog cabling, significant time can be saved in the implementation of a system because you no longer need to run individual analog cabling for each individual signal you wish to transport from one location to another (be that within a rack or around a stadium). Since Dante uses standard Gigabit Ethernet technology, typical CAT5e and CAT6 cabling may be used alongside typical Gigabit Ethernet switches. This makes it fast and easy to setup a Dante audio network and pass signal.
Once your audio is in the Dante network it is easy to integrate audio to and from a computer. This is done by utilizing either Dante Virtual Soundcard (DVS, for multi-channel audio with one program) or Dante Via (for two channel audio interfacing from multiple programs at one time). You can learn more about DVS and Via from Audinate’s website:
Utilizing Dante on an Ethernet network is a great way to provide robust and redundant audio transport in systems of any size. It simplifies interconnection and speeds up installation. The DNA 20K4 Pro, 10K4 Pro, and SC48 are all available with or without Dante. The DNA 5K4c has an outboard 2 channel Dante and Ethernet to analog audio and BvNet control interface available.
The current version of PodWare is 6.22.10. This version is available for download from our website:
Understanding Specifications
Frequency Response part 2
Last time I started to explain the frequency response graph.  Let's pick up where we left off.   I had just shown a graph with a straight line and pointed out that this is where we get the concept of “flat” from.  A straight-line frequency response of a speaker means that what went into the speaker as electricity came out as sound and that transformation was perfect.  Of course, this is never the case, sadly not even with Danley speakers.  I do feel that we come very close to this elusive goal, but that's another article. 

This month I want to focus on some of the ways that a frequency response graph can be misleading or mis-read.  So here are two frequency response graphs.  Which one is the better speaker?  
A.    B. 

Well, if you said Graph A, you are sorta right!  At least you demonstrate that you understand that the straighter the line, the better!  But this is a trick question. Graphs  A and B are actually of the same exact speaker.  In fact, it is exactly the same data, graphed in 2 different ways.  Look closely at graph A.  The units on the Y or vertical axis are 10 units  - in this case decibels – apart.  We say that this graph is 10 dB per division.  Graph B is 3 dB per division.  Graph A will show a lot less detail because the Y axis which sets the resolution of the graph is too coarse.  Graph B is way less forgiving.  So which is right?  Well, they both are.  If you are in sales you might be likely to favor “A” because it glosses over the faults.  If you are in engineering you might favor “B” because it more clearly shows where the speaker deviates from the ideal.  The VIT here ( Very Important Takeaway – I just made that up ) is to always read the labels!   A graph with out a scale is of absolutely no value!  Unfortunately, manufacturers of speakers do not all use the same scale when showing their data.  I have even seen spec sheets where the scale changes from graph to graph depending on what they are trying to show to make sure the product is cast in the best possible light! SHAME!

Take another look at A and B.  You might be tempted to say that Graph A shows a speaker with better response in the bass frequencies, or as we say, the low end.  Examine the Y axis.  You will see that this axis is also not the same between the two.  Graph A shows the response between around 50 Hz up to around 10Khz.  Graph B shows the response from  around 35 Hz to 10 kHz. 
So remember to read the labels!  Look at the scale ( the Y or vertical) and the range (the X or horizontal).  They both need labels, and they both need to be considered when comparing frequency response graphs.

Next time, we are going to discuss power ratings…

Prof. Doug Jones

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