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Oct 16 2019

Tips on how to choose a better Surround Sound System

To help you on your way to a better audio experience, we’re going to discuss surround sound. This is one popular setup that can make listeners feel as though they’re in the middle of the action. There’s nothing like it to sweep you away and envelop you in another world.

Surround sound works through the use of multiple speakers, each of which contributes a different audio channel (or component of the original recording). The system allows listeners to hear the full gamut of sound provided by, say, a speeding car. First, you hear the car approaching, then there’s the sound of it humming beside you and finally the faint hum of it i­n the distance as it zooms past you. This is why some say full surround sound for a movielike experience demands at least five speakers: front-center, left-front, right-front, left-rear and right-rear. Film action and dialogue are separated among the speakers for realism, and background noise comes out of the back speakers.

Knowing this can help you understand some figures often used in surround sound jargon. For instance, 5.1 refers to five speakers (meant for the positions we just described) plus one subwoofer, designated by the .1. Subwoofers play very low-frequency sounds. Other common surround sound systems include 6.1 and 7.1, which include additional rear speakers. Regular stereo sound is referred to as 2.0, encompassing two speakers and no subwoofer.

By JANE MCGRATH

See Full Story at electronics.howstuffworks.com

Written by admin · Categorized: Professional Audio Systems · Tagged: Audio Systems, sound systems

Jun 12 2019

Find the secret to producing noise-free music

Music is a massive bunch of these squiggles all thrown in together, but it can be represented for our purposes as a single squiggle line. Now picture this squiggle line, and let’s mentally cut it in half horizontally. The upper half is just the tips of the wave, and the lower half is just the troughs. Because of the time element and the way the wave is shaped, the tips never line up vertically with the troughs.

Balanced cables, also known as XLR cables by the typical connectors used at the ends, take advantage of this fact to pull off something special: “common mode noise rejection.”

Picture sound-canceling headphones for a moment. They use microphones to listen to surrounding noise, and they inject that noise into your music, delayed half a wave. So they change a tip into a trough, and the tips and troughs of the surrounding noise align vertically.

When this happens, sound cancels out. That’s why they’re called noise-cancelling headphones instead of noise-reducing headphones — they really do nix that business right out.

By DUNCAN TAYLOR

See Full Story at www.coloradodaily.com

Written by admin · Categorized: Professional Audio Systems · Tagged: Audio Systems

May 22 2019

5 Steps to Better Bass in Your Home Theater

Photo by Spencer Selover from Pexels

This 5-Step supplemental article assumes you already have a home theatre system and simply want to improve the bass response for better impact and accuracy. This article also assumes you’ve properly set up the bass management in your AV receiver or processor and made all of the necessary connections to your speakers and subwoofers.

If you’re running only one subwoofer, it may be time to upgrade and get a second matching sub. Dual subwoofers are ALWAYS better than a single subwoofer for distributing uniform bass across a wider listening area and also coupling very low frequencies for greater depth and dynamic range.

Here are the 5 Steps Towards Better Bass in Your Home Theater Room:

  1. Subwoofer Location (preferably multiple subs) – Follow our pictorial guidelines in our Subwoofer Setup Article for suggestive placements or our Subwoofer Crawl. There are multiple locations that can work in your room so finding the right spots is worth the effort to greatly improve sound quality and depth.  Positional EQ(Listening seat location) – where you place your listening seats also determines sound quality NOT just in bass but for the overall home theatre surround envelop. Keep your seating away from back and side walls if possible. Backwall placement is a maximum pressure zone where you will hear very loud but not accurate bass. If you can move the couches at least 1/4L of the room away from the backwall, you will ensure more accurate bass reproduction. 
  2. Positional EQ – Believe it or not you can equalize the sound of your speaker/sub system simply by moving your theater chairs or couches. Proper seating location can have a huge impact in the quality of  bass you hear. You generally want to avoid placing your seats up against a back or side wall. We recommend locating the seats at least 1/4L (L = length of the room) away from the back wall to reduce excessive bass energies caused by build up of standing waves. Locating a seat to a sidewall will shift the balance of the sound towards the closest surround speaker while also severely impacting stereo imaging of the front left/right speakers. Instead, apply symmetry and line of sight principles when locating your couches so that every seating location has a direct unobstructed path of sound to each speaker and the front left/right speakers are equidistant for true stereo imaging.

by Gene DellaSala

See Full Story at www.audioholics.com

Written by admin · Categorized: Professional Audio Systems · Tagged: Audio Systems

Jun 20 2018

Guide to Wireless Speakers For Home Theater

Although there is a large selection of portable and compact wireless powered Bluetooth and Wi-Fi speakers designed for personal music listening, there is an increasing number of inquiries regarding the availability of wireless speakers that are designed specifically for home theater use.

Running those long, unsightly speaker wires required to connect speakers for a surround sound setup can be quite annoying. As a result, consumers are attracted by increasingly promoted home theater system options that tout wireless speakers as a way to solve this problem. However, don’t get sucked in by the term ‘wireless.’ Those speakers might not be as wireless as you expect.

What a Loudspeaker Needs to Create Sound

A loudspeaker needs two types of signals in order to work.

  • First, speakers need to access the music or movie soundtrack. This is provided in the form of electrical impulses (the audio signal).
  • Second, in order for the speaker to take the electrical sound impulses and convert those impulses into an actual sound that you can hear, the speaker needs to be physically connected to an amplifier, which can be powered either by a battery (most applicable for portable devices) or AC power.

Wireless Home Theater Speaker Requirements

In a traditionally wired speaker setup, both the soundtrack impulses and the power needed to make the loudspeaker work are passed through speaker wire connections from an amplifier.

However, in a wireless speaker setup, a transmitter is required to transmit the needed audio signals, and a receiver needs to used to receive the wirelessly transmitted audio signals.

In this type of setup, the transmitter has to be physically connected to preamp outputs on a receiver, or, in the case where you have a packaged home theater system that incorporates a built-in or plug-in wireless transmitter. This transmitter then sends the music/movie soundtrack information to a speaker or secondary amplifier that has a built-in wireless receiver.

However, another connection is needed to complete the process – power. Since power cannot be transmitted wirelessly, in order to produce the audio signal that is wirelessly transmitted so you can actually hear it, the speaker needs additional power in order to work.

What this means that the speaker still has to be physically attached to a power source and an amplifier. The amplifier may be built right into the speaker housing or, in some cases, the speakers are physically attached with speaker wire to an external amplifier that is powered by batteries or plugged into the house AC power source. Obviously, the battery option severely limits the ability of a wireless speaker to output adequate power over a long period of time.

by Robert Silva

See Full Story at www.lifewire.com

Written by admin · Categorized: Professional Audio Systems · Tagged: Audio Systems, sound system

May 16 2018

5 Tips to Design High-Performance Outdoor Audio Systems

Here are five important tips to help you achieve outstanding results:

1. Ask the Right Qualification Questions

The first step in designing an outdoor theater system is to assess the area and the homeowner’s needs. Some of the key questions to ask are:

  • How large is the space you have to fill?
  • How many viewers does the system need to accommodate?
  • Is the area hardscape (paved)?
  • What kind of programming is the customer most interested in: TV sports only, TV news, rom-com movies, action movies, or some combination of all?
  • What are the customer’s performance aspirations?

Someone with a high-ticket custom indoor home theater will likely have higher performance expectations than someone with only a soundbar indoors. These considerations will influence the type, number, and mounting locations of the speakers as well as amplifier choice.

For example, let’s assume the homeowner wants to watch mostly TV sports outdoors and the seating area is small with room for just a few seats on a paved patio.

In this case, a two-channel system with 5.25-inch two-way speakers, possibly with an on-ground subwoofer or an outdoor rated soundbar, would be adequate.

But be cautious of two-channel systems. Listeners seated well outside of the center “sweet spot” will lose the illusion that centered dialog is anchored to the screen.

2. Distance Determines Loudness

The outdoors is big. With no room surfaces to contain the sound and with the high ambient noise typically found outdoors, a critical issue in outdoor theaters is the amount of sound.

How much sound is enough? Sound outdoors follows the Inverse Square Law, where each doubling of distance between speaker and listener drops the output by an audibly significant 6dB.

If a speaker is playing at, let’s say, 70dB at 1 meter (~3 ft.), at 2 meters (~6 ft.) the sound pressure will be 64dB, and so on.

3. Use Omnidirectional Speakers

I have long been a proponent of omnidirectional speakers for outdoor listening, but not for the front channels of outdoor theaters.

For front stage (LCR) speakers, I’ve found that low to medium dispersion (60- to 120-degree) speakers best focus the mids and highs in the listening area and deliver maximum sound pressure where it’s needed.

Most speakers with forward-facing driver arrays are low to medium dispersion designs. Omnidirectional speakers are most appropriate as side and rear channel speakers in surround systems.

By Bill Kieltyka

See Full Story at www.cepro.com

Written by admin · Categorized: Professional Audio Systems · Tagged: Audio Systems

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