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Topic # 179062 25-Aug-2015 10:49
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1000W sub .... anyone can tell how they deal with it, whether you are the owner of such sub or a neighbour of an owner with such subs.

Is it annoying, not annoying, never use it or just don't care about the neighbours.

(Talking about 2 hr action movies)

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  Reply # 1373651 25-Aug-2015 10:57
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How loud is it outside near your neighbours? How late are you using it? Are you in an apartment?

There are a lot of factors. I don't worry too much about my neighbours, but I try not to be too annoying. I hope they do the same. For example, are they mowing their lawn at 7am? That's not cool, in my opinion, so I'd probably go and chat with them about it. I'd imagine they'd do the same if my sub bothered them.

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  Reply # 1373656 25-Aug-2015 11:01
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pretty tricky one, but maybe you just have to ask the neighbour to reduce the volume on their sub. Maybe they don't even realise it is annoying you?

I had a neighbour who would leave the radio on all day with a sub booming away... could hear the low level boom boom boom thudding all day. 

Because it had gone on for so long and there were a few other things I called noise control -- i know, i'm chicken but it did the job. They just reminded them about the bass. 



 
 
 
 


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  Reply # 1373689 25-Aug-2015 11:17
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I have bush on the living side of our property, so no neighbours to annoy on that side, provided i don;t have the movie at deafening volumes. 

Pre-Kids, I used to watch more movies with sound up loud, but don't really do that any more. 

If I were in an apartment, I wouldn't have a surround sound system - I'd use headphones or just a sound bar. 






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  Reply # 1373706 25-Aug-2015 11:25
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I live in an house with a flat underneath, and I run a 300W 12" sub (Kef).  This sits on a wooden floor, just outside the area where the flat below starts.  I have run this for several months with movies and TV shows (the Black List has the most awesome soundtrack BTW!) and I ask the people below if they can hear it, and they never can.

It easily shakes the floor and you can feel as much as you can hear it. Outside the house you cannot hear anything.

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  Reply # 1373720 25-Aug-2015 11:37
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Each situation will vary, so many variables it's hard to give a definitive answer.  Just see how you go, if you get a knock at the door or eggs thrown at your house you will know you have reached the tolerance threshold.  




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  Reply # 1373722 25-Aug-2015 11:38
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Decoupling is the key in sound. Decouple the floor where subwoofer sits by creating a subfloor which it sits in top of. Lay the below 9mm mat on the concrete floor then double plywood screwed together on top then whatever your flooring is (underlay with carpet on top etc) of it's laminated or hardwood floor then you only need to lay the mat with layer of single 7 or 9mm plywood with laminated or hardwood floor on the top. The entire subfloor needs to have at least 1inch gap from all 4 sides of the wall  so it's not touching the foundation walls else the low frequency from subwoofer will get transferred that way. This is purely just for containing low frequency from a subwoofer in a single floor house. Sound proofing is another solution.

http://www.ecofloors.co.nz/item/379/acoustic_flooring_underlays/Quietsound




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  Reply # 1374152 25-Aug-2015 19:38
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You could always buy a subwoofer with 'night mode' and use that after 8pm...?
I have very little need for a sub with my speakers, but I will try it. However, when I do, it will be mid-day without the neighbours at home.



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  Reply # 1374154 25-Aug-2015 19:41
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yes that tends to be when I'm at ease using my sub, when they are not home. I know what it will do to their bedroom at night, so i'm just asking for people's opinion and experience

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  Reply # 1374185 25-Aug-2015 20:31
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We have a neighbour who used to crank his stereo right up. He's a bit of an alcoholic, quite solid and relatively grumpy. Pandering to his excesses, I went over with a carton of beer and we had a nice neighbourly discussion. That was mostly the end of the problem.

A lot of people don't have the gumption to go and actually talk to their neighbours though, so perhaps introduce yourself to yours and let them know they're welcome to knock on your door and ask you to turn the stereo/sub down if it's annoying them. Nothing quite like getting on with your neighbours!

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  Reply # 1374246 25-Aug-2015 21:56
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One of our problems is perception of base, we don't hear subs at the same volume metric dB level as speech to be perceived as the same level. Approximately 85-90dB difference in level, consequently because sub levels wavelengths pass through materials easily subs by dB and perception are louder outside or in other rooms.

Although sub level sound coming from full range systems or subs tend to pass though everything, modest acoustic treatment can dampen down a reasonable amount of sub dB level.

Re-gibbing with acoustic gib, acoustic insulation and double gib layers do indeed help, the denseness of two 13mm layers do help considerably on sound getting out and getting in. A forgotten aspect of acoustic isolation is lowering the noise floor for the room, do this and you find you can be listening at lower dB volumes thus lowering sound getting out.

Concrete floors are better, wooden floors, well you have to listen for sound box effects transferring around the home. Some use sand beds and or traps to dampen sub levels, however traps can be somewhat hit or miss. Acoustic cancelation can work better, but this is very difficult to get right.

I once worked in a recording studio in the UK, we had sub frequencies travelling 30m into a neighbours coal box which was empty and this vibrated as a sub box. Took a lot of penny's to isolate the studio with secondary isolation layers, we also packed the coal box to change it's shape. But even then we had to peak limit the system during the small hours.

The best way to start with an existing home is test what you have, but do try to balance the sound system out by at least using the automatic correction. Most of the named brands have these functions.
This will help remove a few peaks off the sub/room combination and help the listening experience.
Purchase a cheap dB meter and measure levels around the home, outside, night and day and build a simple sound map. note the day map will have daytime city levels as a baseline, this changes your perception of loud at night. From this you can target problems should they exist.




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  Reply # 1374362 26-Aug-2015 08:18
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I have a Wharfdale sub, inside it's pretty loud. As soon as I go outside it's inaudible. I have floor, wall, and ceiling insulation. Is your house insulated?




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  Reply # 1374441 26-Aug-2015 09:43
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how well do you know your neighbour ? i used to live in a semi detached property and they could hear everything, we simply said if they could hear it and wated to come around and watch it then they could, they started turning up with beer, food etc for the good movies !  



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  Reply # 1374444 26-Aug-2015 09:46
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I might try placing the sub just behind (1.2m behind) my seat and then turn it down. maybe that could work better. then I will talk to them and find out. at the current set up when I sit in the car in my drive way the car shakes.

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  Reply # 1374520 26-Aug-2015 11:07
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Really, I would talk to them first. If they don't have a problem, you don't have a problem. If they do, it'll help give you an idea of how far you need to take things to come to a happy medium.

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  Reply # 1374637 26-Aug-2015 14:29
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Joker, because the wavelengths are large the room fills with mode peaks during long durations of sub levels. Where you place the sub effects the zones related to the modes.

Effectively the shape and size of the room creates modes, frequency's that add per reflection, which cause audible lumpy base. A frequency sweep at the same dB volume will sound louder and softer as it passes the mode peaks.

If you sat on a mode, which shifts location due to sub position(within reason), it will sound louder and you could lower the dB of the sub. However, 0.5m either side of the mode location and you might not hear sub at all. This is why some have as many as 4 subs, or at least 2. With positioning you can fill more volume space with multi subs.

However, using this knowledge of modes and positioning you can position the sub to be strong in the listening locations so then you can actually turn the volume down to balance the system.

To find the best sub location, you need a tone generator(pc) to play a sub frequency, typically a strong mode is about 65~75hz with a lot of systems. Place the sub in the seat play a single tone and the modes will create squares of sound in your room, when you walk about the room you will hear loud soft as you pass the mode. A dB meter is more accurate.

On a peak relative to the sub in your seat is where to place the sub in the room. There will be a number of locations.




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