Subwoofer unpleasant sound

[Petrolsmasher]

Just wondering if there is a subwoofer fault or if its normal and if there is anything i can do about it.

Basically at certain resonances you can hear the air being forced out the back, its quite loud and distracting, its from mid volume upwards, it is loud when it does it but no review mentions it, but maybe i need to just turn it down lol.

[Donbot]

They make that sound if you overdrive them. It's difficult to know if it is that though as your definition of loud could be anything Everything has natural resonance, so it could be the speaker, the cabinet itself, a combination of things etc. Try putting something heavy on top of it to see if it helps.

[Petrolsmasher]

Donbot said:

They make that sound if you overdrive them. It's difficult to know if it is that though as your definition of loud could be anything Everything has natural resonance, so it could be the speaker, the cabinet itself, a combination of things etc. Try putting something heavy on top of it to see if it helps.

Annoying thing is though is its happening from 25/100 volume on mid bass.

It is loud, fills a 7 metre by 3.5 metre room really well but for a 700 pound 380 watt system i expected more, think the sub is 180 watts.

[stevoknevo]

Petrolsmasher said:

Annoying thing is though is its happening from 25/100 volume on mid bass.

It is loud, fills a 7 metre by 3.5 metre room really well but for a 700 pound 380 watt system i expected more, think the sub is 180 watts.

If its rear ported it could be to near to a wall and its the displaced air you're hearing hitting the wall? Try asking in the hifi and home cinema forum and add the details of sub it is - could be a few things like incorrect phase set-up, incorrect crossover settings, port rushing/flapping (for want of a better definition) etc.

Edit - just noticed you said it happens on mid bass, you've likely got the cross over set wrong as by its very definition it should be dealing with sub bass and your main speakers with the mid bass, so it's possibly/probably trying to play various bass frequencies and getting out of shape - I've got a fairly old and basic sub and the crossover is set on my AV receiver for my main speakers at 60hz and the sub is set to handle anything below that.

Edited by stevoknevo on Tuesday 17th March 22:08

[Petrolsmasher]

stevoknevo said:

Petrolsmasher said:

Annoying thing is though is its happening from 25/100 volume on mid bass.

It is loud, fills a 7 metre by 3.5 metre room really well but for a 700 pound 380 watt system i expected more, think the sub is 180 watts.

If its rear ported it could be to near to a wall and its the displaced air you're hearing hitting the wall? Try asking in the hifi and home cinema forum and add the details of sub it is - could be a few things like incorrect phase set-up, incorrect crossover settings, port rushing/flapping (for want of a better definition) etc.

Edit - just noticed you said it happens on mid bass, you've likely got the cross over set wrong as by its very definition it should be dealing with sub bass and your main speakers with the mid bass, so it's possibly/probably trying to play various bass frequencies and getting out of shape - I've got a fairly old and basic sub and the crossover is set on my AV receiver for my main speakers at 60hz and the sub is set to handle anything below that.

Edited by stevoknevo on Tuesday 17th March 22:08

Unfortunately its a soundbar not an independant subwoofer so i dont think there is a way to set crossover levels etc? It is near a wall but the noise itself is from the air port at the back of the sub

[stevoknevo]

Petrolsmasher said:

Unfortunately its a soundbar not an independant subwoofer so i dont think there is a way to set crossover levels etc? It is near a wall but the noise itself is from the air port at the back of the sub

Ah, likely just asking too much of its capabilities then, sadly - bung the port up with a bit foam would be my suggestion, a lot of speakers with ports come with foam bungs to tune the bass response, worth a bash!

[Petrolsmasher]

stevoknevo said:

Petrolsmasher said:

Unfortunately its a soundbar not an independant subwoofer so i dont think there is a way to set crossover levels etc? It is near a wall but the noise itself is from the air port at the back of the sub

Ah, likely just asking too much of its capabilities then, sadly - bung the port up with a bit foam would be my suggestion, a lot of speakers with ports come with foam bungs to tune the bass response, worth a bash!

thanks ive seen that suggestion, isent the port there for a reason though?