oh my...

[kwitcherbichin 10+ year member]

YouTube - Project Big Black - Bottle Trick - 25hz

i want this so bad =[

Click to read more...

 

[hatedonmostly 5,000+ posts]

lulz at the surrounds.

 

[kwitcherbichin 10+ year member]

i like em. looks like fucking bicycle inter tubes lol.

 

[audioholic 5,000+ posts]

YouTube - Project Big Black - Bottle Trick - 25hz
i want this so bad =[

Either there's a phase issue with the speakers, or that enclosure was designed poorly.

 

[AQHDC3 10+ year member]

Sic

 

[kwitcherbichin 10+ year member]

Either there's a phase issue with the speakers, or that enclosure was designed poorly.

whats ur problem.. i was talkin bout how there moving.

 

[Wingman0121 10+ year member]

No problem that I can see except that it'll wake up babies a mile down the road //content.invisioncic.com/y282845/emoticons/hilarious.gif.02a037aad04aa96f19982b298a3d70a8.gif

 

[kwitcherbichin 10+ year member]

No problem that I can see except that it'll wake up babies a mile down the road //content.invisioncic.com/y282845/emoticons/hilarious.gif.02a037aad04aa96f19982b298a3d70a8.gif

works for me =D

 

[Buck 5,000+ posts]

Either there's a phase issue with the speakers, or that enclosure was designed poorly.

Explain...

 

[kwitcherbichin 10+ year member]

Explain...

thats what im sayin.

 

[audioholic 5,000+ posts]

Explain...

The video clearly shows at least one of the drivers moving out of rhythm with the others. This means it is either out of phase with the other drivers, or the enclosure was designed so that the port opening is not equidistant from each speaker, which would place uneven resistance on each cone's ability to move, leading to non-uniform excursion from one driver to the other. Its a fairly common design problem with walls holding an array of smaller subs, as building it symmetrical about every speaker can be a real task.

 

[audioholic 5,000+ posts]

whats ur problem.. i was talkin bout how there moving.

Try posting a question that makes sense next time. Id be glad to answer any question that is legible.

 

[Buck 5,000+ posts]

Thanks for the easy-to-understand answer audioholic!

What kind of effect does that issue have on sound as far a SPL numbers?

 

[audioholic 5,000+ posts]

Thanks for the easy-to-understand answer audioholic!
What kind of effect does that issue have on sound as far a SPL numbers?

If some speakers are closer to the port opening than others, excursion will vary. The speakers moving less will generate less pressure. But the ones closer will move more. How this affects the over all SPL score is difficult to say, because it depends on many factors (like how uneven the pressure varies inside the box, how many speakers are involved, etc). It would take some fairly extensive testing to determine exactly how it affects an SPL score, and that would not be a universal affect from one system to another.

 

[Buck 5,000+ posts]

So it's just something you'd probably have to deal with then. That would be too much trouble to try to fix.