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How to transport an Audio Signal up to 600 Ft (183m) without ground noise or inductive noise

PDF Link

 

When transporting an audio signal more than 10 feet (3m) indoors or out, the environment could cause a major problems that manifest itself in inductive noise. THIS TYPE OF NOISE IS NOT ATTRIBUTED TO GROUND LOOP.

So how does this happen? We know that electricity is generated when a moving magnet is moved forward and backward near a long wire. So the same is true. When you have long runs of CAT5, CAT6, RCA, XLR wires, all conductors such as wires or cables that travel through space are vulnerable to this type of electrical INDUCTION. Typically you have low level signal of 1V or even 2V. As the signal travels through these wires, magnetic fields generate electricity in the signal wire.

 

Example

Lets assume that you have 50 feet(15.2m) of wire going from a control room in a house and travels up into an attic and then back down into a theater room. The wire run is traveling between several circuits that have 110V and 220V AC. These AC circuits generate electricity into the signal wire. Lets assume that you have a 1V signal and a 50 foot run. This could easily generate 0.25V of hum noise. Let’s refer to the table below.

 

 

If my reference in decibels is 0.25 which is the noise level and the signal is 1V, then it is clear that the S/N ratio is 12dB. This is terrible. This table shows how a 0.01, 0.1, or 0.2 volt noise is compromised by the low voltage signal of 1–1.6V. Using the Hum Kleaner will allow you to scale up a 1V signal to a 16V signal. You are now able to transport the signal (high signal low noise pickup) and once it arrives towards the end of the run you reduced it back down with the HLLC-200 to a 1V balanced signal. Please note that the HLLC-200 also has a balanced ground loop isolator as well as a high low adapter. In addition; the HLLC-200 can produce a 12V trigger to control other components.

 

WIRING

Please note that all outputs are Active. If you use RCA on the input side then the XLR, RCA, and TRS are active and all are balanced. Turn the gain to MAX and you can then transport the signal up to 600 feet(183m).

The Hum Kleaner is a pre-amplifier that allows for a non-balanced signal to be amplified and balanced. A 1V input on the RCA will allow up to 8 VAC output. A 1V input on the XLR will be amplified to 16V. You must select the input you intend to use.



Review: Bass Shakers and Tactile Sound (AudioXpress)

 

 

Voice Coil Magazine cites EQ chief engineer Joseph Sahyoun as speaker guru and highlights the new US Patent 9.294.841 B2 in this following section:

“What if we could move more air (“pumping power” or volume velocity) without more piston area or increased excursion?

A recent (US Patent 9.294.841 B2) innovation by speaker guru Joseph Sahyoun that will reach productization later this year compliantly suspends the microspeaker with a flexible membrane that encircles the speaker.

The kinetic energy that is generated by the moving mass (the entire speaker along with the frame) is tuned to be in phase to extend the bottom end almost an octave, essentially using the entire microspeaker concurrently as a passive radiator.”

– Trends in Microspeakers, Mike Klasco (Menlo Scientific, Ltd.)

For the full article: Voice Coil Magazine (Volume 32, Issue 5,  March 2019)

Check out the in-depth review on the new MiniMe DSP from John E. Johnson Jr. Audio Video Consulting:

MiniMe DSP P12 Subwoofer Review

In a Nutshell

Earthquake Sound makes amplifiers, speakers, and subwoofers. They are all very powerful, as per their titular company name.

I have reviewed some of these earthquake-inclined items over the years, and they all met the standards I hold.

The MiniMe DSP P12 continues to uphold those standards with its beauty and power. Highlights… Continue reading

 

We are now ready for ISE 2020!

Join us at booth 5-R81 between 11-14 February in Amsterdam, RAI, NL

Admission on site is 175 + VAT, but you can pre-register for FREE at www.iseurope.org using our invitation code:

829992

 

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Earthquake Europe at ISE 2020

11-14 February Amsterdam, RAI, NL

Taking place on 11-14 February 2020, ISE is a unique four-day event that places you right at the centre of the world’s largest gathering of AV and systems integration professionals. Join the crowds at ISE 2020 and be our guest!

Admission on site is 175 + VAT, but you can pre-register for FREE at www.iseurope.org using our invitation code:

829992

Come visit us at booth: 5-R81

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This YouTube player mockup includes fully editable vector layers for every function.(will open in a new tab)

 BeKent and Earthquake Sound at CES 2020 presenting the new MiniMe DSP Subwoofers.

In stock in Europe available in 10″ & 12″ versions:

https://www.earthquakesound.dk/…/subwoof…/minime-subwoofers/

 

Earthquake Sound would like to show just how versatile our products can be in the hands of professional installers or the Do-It-Yourselfer.

A custom installer reached out to us to show off their work that showcased Earthquake products. The install included a custom-made box fitted with our famous Magma subwoofer and coupled with the PUMP-12 passive radiator module to deliver massive bass for a spinning class.

The install also included our well known DJ-Quake 4×4 array speaker in the corners of the room. The combination of these products is sure to pump up any spinning room and help grind out those tough miles.

We at Earthquake enjoy seeing your projects and our products put to work. If you have a story to tell or images that you would like to share then please feel free to reach out to us. We would love to hear from you.

 

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Earthquake Sound has recognized the importance of home audio products being able to communicate with Alexa and other Amazon devices. Our in-wall Bluetooth® amplifier will work with Alexa and expand the possibilities of your audio installations.

Whether you are a large builder, home integrator, or just a weekend do-it-yourselfer, the BTA250 will give you plenty of flexibility and control when you need to add an audio zone and have it be work with the latest technologies. The BTA250 can also be renamed through a process via mobile app, allowing you the option to assign a unique name which becomes even more important if you have multiple BTA250 units. Large offices, dorm rooms, hotels, and apartments are just a few examples of how renaming the amplifier unit benefits the installer.

Each BTA250 comes with the in-wall am­plifier unit, B120R retrofit electrical box, 24VDC power supply, and a cable adapter. This two-channel stereo amplifier can accept signal through the front panel 3.5mm stereo mini jack or via Blue­tooth® connection and produces 50 WRMS per channel at 4-Ohm. For added convenience, it also features a front mounted control knob so that you can manually adjust the volume.

Designed to fit into most standard single-gang junction boxes, the BTA250 can be easily installed into any new or pre-existing constructions {homes, bars, restaurants.garages, hotel rooms, etc.). Earthquake’s in-wall Bluetooth® amplifier makes listening to your favorite music or movies in any room easy with the push of a button.

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