Home speaker system subwoofer placement auto
Working closely together with Mazda yields remarkable rewards. This is our newest: integrating the front bass sources into the body of the new Mazda3 combined with a rear bass enclosure in a way that makes the listener the center of the action. The low frequencies. There are many names for it.
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Content:
- The Five Cs of Subwoofer Setup
- TCL Alto 7+ 2.1 Channel Home Theater Sound Bar with wireless subwoofer - TS7010
- Car Speaker Placement and Kickpanels
- REL Recommended AVR Settings
- Choosing the Best Sound Bar
- Play audio in Dolby Atmos or surround sound on your Apple TV
- Car sub woofer in a home audio setup
- Subwoofer Placement in Cars
- Tips For Placing Your Television & Speakers In Your New Home Theater
- THE NEXT STADIUM STANDARD
The Five Cs of Subwoofer Setup
If you really want to craft your bass end, a subwoofer can be indispensable. Here's the low-down When I was first getting interested in all things audio, home subwoofers were rather specialist devices that were only of interest to two groups of hi-fi enthusiasts: those who listened to large pipe organ recitals and those who enjoyed reggae!
Things have moved on a great deal since those distant days, and today subwoofers are now considered — more for the 'domestic acceptance' factor than any potential sonic benefits — to be an almost standard part of modern hi-fi and studio monitoring systems. It is therefore becoming increasingly common to have smaller 'satellite' left and right speakers, plus one or more subwoofers — a format often referred to as 2.
The two refers to the main pair of stereo left and right speakers, while the '. In the same way, a surround sound system is often denoted as 5. However, in the case of 5. The fact that this sub usually also doubles up, through the use of bass management explained later , to handle the bass content of all five main channels as well, is just a convenience that allows the use of smaller satellite speakers.
Again, I'll come back to this topic later, but I first want to consider 2. When designed and used appropriately, subwoofers can be extremely effective and very convenient. Equally, though, it is very easy to destroy any chance of good monitoring quality with an inappropriate or badly set-up subwoofer — and it is worth stating that I have probably seen nine unsatisfactory installations for every good one!
Poor subwoofer installations usually suffer from too much, or poorly defined, bass. Often there is an obvious 'hole' in the frequency spectrum in the crossover region between the satellite speakers and the subwoofer.
It is the 'integration' through this crossover region that really makes or breaks the system as a whole. The worst kind of subwoofer system will only provide a boomy or monotonal 'woomf' of energy, regardless of the pitch or dynamics of the bass instrument, and the bass might thus appear to be slow or late relative to the main speakers.
On the other hand, a well-designed and well-configured system will usually enable more accurate imaging, and have a clearer, more transparent mid-range thanks to lower distortion and intermodulation levels and higher overall output than could be achieved with the satellites alone.
From a practical point of view, a satellite and subwoofer combination is much easier to site and to move around. The individual speaker cabinets are more compact and lighter than full-range speakers, and that is often an important consideration — especially in small home studios and for location-recording rigs.
So the aim of this article is to try to explain the hows and whys of choosing and using a subwoofer, in the context of both stereo and surround sound applications. The first thing to understand is the basic concept of a subwoofer system. What it is trying to do, and how does it work? Obviously, the fundamental idea is to reproduce low frequencies. In most cases, this is roughly the bottom two octaves, from 20Hz to 80Hz. However, here lies the first major issue we need to take onboard: having a special box that generates low frequencies doesn't guarantee good bass in the listening room — in fact, far from it!
The room's own acoustic properties are of paramount importance. If you put the world's best subwoofer in an acoustically poor room, you'll get very poor bass performance! I have frequently come across monitoring systems where the owner has added a subwoofer in the hope of curing a weak or lumpy bass response, only to discover the situation either doesn't improve or actually gets worse!
If the room has nasty standing-wave problems — and almost all home studios do — it's vital that these acoustical problems are sorted out first, before you spend money or time on a subwoofer.
You can often improve a room's acoustics dramatically for minimal cost with some basic DIY. And with a treated room you may well find that your existing speakers actually deliver much more and better bass than you thought! Another useful benefit of a subwoofer is the additional power handling accorded to the system as a whole.
The acoustic energy in music is highest at low frequencies and tails off with increasing frequency.
So employing a dedicated box to handle much of the power-hungry bass takes that burden from the satellites, with useful benefits in overall power handling and clarity. Most stereo systems have two main speakers, yet we have only one subwoofer. Why not two subwoofers as well?
In some situations there can be advantages to having two or more subwoofers, but in general one is usually sufficient. The reason for this is connected to the fact that, for frequencies below about Hz, our sense of hearing measures the phase difference between a sound arriving at each ear, whereas above this frequency it uses mainly level differences.
Out of doors, our ability to determine a sound's direction remains quite accurate down to remarkably low frequencies, but this ability collapses when listening indoors. Sources generating low-frequency sounds below about Hz tend to do so more or less omnidirectionally the sound wave travels from the source in all directions because the wavelength of sound is usually larger than the object itself.
When a low-frequency sound is generated within an enclosed space, the spherical sound waves created will reflect off the boundary surfaces of the room to arrive back at the ears with a multiplicity of phase variances, due to path-length differences.
This confusion of signals makes it impossible for the ear and brain to extract a reliable phase difference, so normal directional acuity fails. So in theory, since you can't tell where the low frequencies are coming from in a room, one subwoofer will be entirely sufficient.
The harmonics of the bass notes will be reproduced by the satellite speakers — which typically start to take over above about 90Hz — and these will provide plenty of directional information through phase and level differences, in the usual way. So, although the bass itself is folded down to mono, the impression of stereo imaging is actually preserved perfectly satisfactorily.
This theory is all well and good, but I often hear people comment that they can hear where a subwoofer is placed in the room. This isn't because of some special acoustic ability on their part, though —rather, it is because of the poor performance of some subwoofers!
Designs constructed at a low cost, employing inferior drivers, and those designed to favour efficiency above all else, tend to generate a lot of 'out of band' noise — lots of harmonic distortion and audible port noises, or other artifacts.
These occupy the mid-frequency range, which not only makes their position easily detectable, but also obscures and masks the critical mid-range frequencies from the satellite speakers.
So adding a cheap subwoofer to quality satellites will actually tend to make the system less rather than more accurate. A good subwoofer needs to have a very linear driver which is expensive , an accurate and powerful amplifier which is expensive , and a well designed and built cabinet which is But cutting corners on any of these aspects is a false economy.
I've listened to and used a lot of different subwoofers, and the best are, for all the obvious reasons, produced by the same companies you associate with good monitor speakers. They are all relatively easy to set up because of the inherent close matching and the appropriate electrical alignment facilities. Whereas many subs are large cuboid boxes, the TLE1 has the form factor of a computer tower case, which I find both aesthetically and practically appealing.
When buying a sub, the key is to try it in your own listening environment, with your own satellite speakers — particularly if the subwoofer is from a different manufacturer.
Some combinations will integrate far better than others, and only a home audition will reveal the success or failure of a particular combination. The diagram shows a bass-management system. Each of the five main channels goes through a high-pass filter to remove the low-frequency element of the signal, before being passed on to the appropriate amplifier and speaker.
Bass management is the process of removing the bass element of the signal fed to each satellite speaker, and routing it instead to one or more subwoofers. In essence this is no different to a normal crossover — it's just that the bass driver happens to be housed in a separate enclosure, and there needs to be some sort of mixing facility included to combine the low-frequency contributions from at least two channels.
In the case of a simple 2. There are various approaches to wiring, but most route line-level signals from the controller or preamp to the subwoofer first, which filters the signals and outputs them for the satellites.
Some systems work the other way around, connecting the signal to the satellite first, and then down to the subwoofer. Systems intended for domestic use often work with speaker-level signals. For 5. The diagram on the previous page shows such a system.
All five channels are also summed and passed through a low-pass filter to remove the mid- and high-frequency content.
This signal is then combined with the dedicated LFE signal which is also low-pass-filtered and boosted in gain, according to the appropriate specifications , and routed to the subwoofer speaker. It is worth bearing in mind that, since each of the five channels in a 5. So you shouldn't really expect a very small box to be able to cope if you like listening at serious levels. Of course, different systems implement bass management in slightly different ways.
Some employ active filtering everywhere, whereas some only low-pass-filter the signal feeding the sub, relying on the satellite speakers' natural roll-off for mechanical high-pass filtering.
Some will allow the filter turnover frequencies and slopes to be adjusted. Professional units usually do this with meaningful technical parameters, while domestic controllers tend to have simpler 'large' or 'small' speaker descriptions. The better systems often include some sort of limiting or overload protection for the subwoofer, and some also include facilities for delaying the sound to each speaker, in order to compensate for less than ideal physical positions.
Most domestic systems only apply bass management to digital surround inputs Dolby Digital and DTS sound tracks but not to discrete multi-channel analogue inputs, and this can present problems if you want to use a cheap domestic surround controller for your surround monitoring. Another common trap is that some DVD players have their own bass-management facilities built in, which means that you need to make sure you don't end up duplicating the processing!
While it is relatively easy to generate high levels of bass over very small bandwidths and that's what most cheap subwoofers tend to do , designing something that can generate a high output over a broad bandwidth, with very low distortion, and remain a sensible size, is pretty tricky.
Creating low-frequency sound at studio replay levels requires the movement of a lot of air. This requires a powerful amplifier, a very large bass driver or several smaller ones , and a lot of diaphragm displacement. An easy way of achieving high efficiency is to place the driver in what's called a 'band-pass cabinet'. This is essentially a resonant, tuned box, with the driver hidden inside and the sound escaping through one or more ports.
You see these quite commonly on cheap home theatre systems and in car 'boom boxes. This is great for film explosions and crashes, but is not much use if you want to hear which notes the bassist is playing, so it is best avoided for serious monitoring duties. The majority of subwoofers employ some form of 'reflex' design, which combines practical efficiency with useably wide bandwidth, and in convenient sized enclosures. The design principles are thoroughly understood, with the front of the driver radiating directly and its rear contributing via the enclosed cabinet volume through one or more ports.
Not all reflex designs are born equal, but most studio-quality subs will be of this kind of design. A rather less common alternative is the 'closed box' design. The cabinet is sealed, and only the front side of the driver contributes sound to the room. Efficiency is relatively low, and significant demands are placed on the amp and driver the latter needs to be able to cope with unusually large excursions. However, this approach has considerable benefits in terms of its phase response, timing and distortion.
Another close variation on this theme is the 'transmission line' approach, which aims to combine the best elements of both sealed and reflex cabinets. These two types tend to be the most expensive, but also the easiest to align and integrate, and with the most accurate sound.
Don't be fooled by the size of the subwoofer. Bigger doesn't necessarily mean better, or even greater low frequency extension, although it does usually equate with louder; that business about needing to move a lot of air, again.
The physical and electrical alignment of a subwoofer is a much misunderstood process, but to get it wrong is to destroy the accuracy of the monitoring system as a whole.
Firstly, it is vital that the subwoofer and satellite speakers are all in the same phase as each other — by which I mean their electrical polarity and time alignment. If this is not the case, the crossover region will have an obvious bulge or dip in level.
TCL Alto 7+ 2.1 Channel Home Theater Sound Bar with wireless subwoofer - TS7010
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Car Speaker Placement and Kickpanels
The Dynaudio Excite Sound System for the Volkswagen Golf is comprised of nine high performance loudspeaker drivers, with 2-way loudspeaker sets in the front and rear of the vehicle and a dedicated dual voice coil subwoofer discretely mounted in the boot of the car, collectively powered by a sophisticated watt digital amplifier. The combination of innovative Dynaudio loudspeaker driver technology and powerful electronic components yields a clear and precise sound with wonderfully lifelike dynamics, even at high sound pressure levels. In the process it establishes a new benchmark for premium sound systems in the compact class. Want to learn more about how we tune a car? Click here to learn more about the Golf on Volkswagen's website. Setting the stage for a perfect sound experience: a centre channel driver serves to place the orchestra in the front of the car. Even though the seating is asymmetrical, the advanced Dynaudio technology compensates for this to yield a precise soundstage allowing each passenger to experience perfect sound. The Dynaudio Excite Sound System for the Golf Sportsvan is adapted from that of the Golf, but adds a dashboard-mounted centre channel loudspeaker. The system features 2-way loudspeaker sets in each of the four doors, a dedicated centre speaker, and a dual voice coil subwoofer that is discretely mounted in the boot of the vehicle.
REL Recommended AVR Settings
In these cases, getting good bass becomes much more difficult. The answer is: Get two subwoofers! Properly placed, two subs will provide smoother, more consistent bass coverage to all the listeners in the space. So then, how do you get two subs to produce great bass in your place? But if you have a rectangular room, you can use some general placement guidelines as starting points.
Choosing the Best Sound Bar
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Play audio in Dolby Atmos or surround sound on your Apple TV
For many car audio enthusiasts, the defining characteristic of any stereo system is that classic low bass sound. You can add bass to any stereo system, and it automatically fills out the sound. So, if you want to add some depth — and even thump — to your stereo system, then check out these top picks for car subwoofers. A subwoofer is a speaker that produces low-frequency tones in music. It amplifies the low pitches bass notes in a song and also the low-frequency vibrations and sound pressure that come with those low pitches. Subwoofers are designed to handle the intensity from bass sounds and sub-bass harmonics.
Car sub woofer in a home audio setup
Car subwoofers have become tremendously popular. Car owners who are music enthusiasts know that driving without low pitches is boring. However, one question that has sparked debate is where to place subwoofers in a car. Placing the sub in the wrong position can minimize your audio experience.
Subwoofer Placement in Cars
RELATED VIDEO: How To Connect Car Audio At HomeA quick look at our TV ratings will show that while many TVs these days offer great picture quality, that's not as true for sound. Only about 80 of the plus televisions in our TV ratings can deliver satisfying sound quality. One great—and increasingly popular—option is to add a sound bar speaker. A sound bar has several speakers and the electronics to power them in one thin enclosure that you connect to your TV, with no need for a receiver. Some have a separate subwoofer, usually wireless, and a few have rear speakers to create a full surround-sound system.
Tips For Placing Your Television & Speakers In Your New Home Theater
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THE NEXT STADIUM STANDARD
Location of each speaker. RH Right front high speaker. Parts and Controls Receiver Front panel upper section Front panel lower section Power indicator Indicators on the display panel Rear panel Remote control Remote control upper section Remote control lower section Preparation 1.
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