And this wave is straight-forward, not downward. When the sound waves face downward, the floor absorbs the energy instead of your ears. Sound quality worsens by 2 when musical instruments are part of the track but it comes through the subwoofers. The domino effect starts because of the shaking of the subwoofer box. And since the shaking directly affects the floor, the floor starts shaking.
After that, the ceiling comes next. Prime Series. Prime Systems. Ultra Series. Ultra Systems. Prime Wireless. More About Speakers. Prime Wireless Speaker System. Prime Wireless SoundBase.
Prime Wireless 2. Premium Bookshelf Speaker Stands. Premium Center Speaker Stands. SVS T-Shirt. All Accessories. All Outlet Specials. Subwoofer Outlet. Speaker Outlet. Sound Experts Blog. Featured Artist Systems. To sum it up, MDF is the most popular and generally best material to use to build a subwoofer box.
We hate SPAM and promise to keep your email safe. Built a box to fit under the seat of a school activity bus with 2 of these powered by a CT If you need to fill out the bass, but don't want to give up your trunk to do so, these subs are a great option. Close menu. Close cart. It makes sense to place a single subwoofer in front of the listener, rather than behind, and directly facing the listening position too.
It should be well away from corners, but you should also avoid placing it at the centre of the room width, in order to minimise excitation of standing waves. The closer the subwoofer is placed to the wall, the greater the bass boost will become. Some models are designed to be placed close to a wall, specifically to benefit from this, but some are not — which means you should always check the manufacturer's recommendations. Often, small changes of distance in relation to a wall can make a big difference in the balance of deep bass, so don't be afraid to experiment.
For the subwoofer to work properly and not be locatable, the crossover between satellite and subwoofer should be set below about 90Hz, and that means the satellite ideally needs to have a decent response down to 70Hz or so. Anything above that starts to intrude into the mid-range and the subwoofer will become locatable. The THX organisation recommends crossing over at 85Hz, and I've found that to be a good starting point in most cases.
Ideally, a subwoofer and satellite system would be aligned using proper acoustic measuring equipment, but few of us have access to that, or the experience to interpret the results properly. Fortunately, though, you can usually get very good subjective results if you give it some time and patience, and take a logical approach. Start by placing the subwoofer in the listening position, with approximate filter and volume settings — 85Hz and a volume that seems roughly right.
You'll then need to play through a collection of music tracks with well-recorded bass lines in different keys. Alternatively, create your own test track using a sound generator or keyboard, playing each note percussively not continuously and with uniform velocity settings.
All you then have to do then is crawl around on the floor listening at each potentially practical subwoofer location for which position gives the most consistent and natural bass sound. You'll find some places exhibit some boomy and resonant notes, while others will have obviously weak or missing notes. Hopefully, you will discover one or two places where the sound is well balanced and all bass notes are pretty uniform.
Having identified an optimal location, place the subwoofer there and reinstate your listening chair. Placement of your subwoofer is important. Finding the right place is a matter of getting down on your hands and knees, moving around and listening to some well-recorded bass, with the sub in your normal listening position.
When you've found where it sounds best, relocate the sub there. These controls tend to be interactive, so you'll probably have to cycle around their setup before you arrive at the best combination. I usually start with the subwoofer turned right down and then play through a wide collection of music, concentrating on how the mid-range and upper bass notes sound. Once familiar with what the satellites are doing on their own, I start to increase the level of the subwoofer until all the bass notes are even in level, regardless of pitch.
It is very easy to overcook the subwoofer level, and although it may sound impressive, this quickly becomes tiring and leads to bass-light mixes, so take your time and listen critically.
If the deepest and highest bass notes seem right, but it all goes wrong in the crossover region, try adjusting the crossover frequency up or down slightly to find the smoothest transition. If there is a phase control, you will find that small phase adjustments can often make surprisingly large differences here too, especially if the subwoofer is from a different manufacturer from the satellites.
Remember, all three controls will interact, so take your time, live with a good setting for a while, and don't be afraid to experiment. I normally allow at least an hour to set up a subwoofer by ear, and I usually carry on with the fine-tuning for a couple of days afterwards, until I'm happy that I have achieved the best possible performance.
Finally, remember that low frequencies are very hard to contain. Adding a subwoofer will inevitably result in some of your new-found deep bass leaving the listening room. This may well annoy your neighbours, even if they previously tolerated the system without the subwoofer. Generating low bass may also excite room standing-waves that you were not previously aware of, and it may also result in various structures of your building rattling and resonating in ways you've not heard before!
The last time I recalibrated the subwoofer in my own 5. Subwoofer Cabinet Types 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. Buy PDF version. Previous article Next article. You may login with either your assigned username or your e-mail address.
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