why does this piece of paper move so much?

[Death By Bass 10+ year member]

first 10 seconds, is just frozen for some reason... next 20 seconds it doesn't do much, but then 30 seconds into the video, the paper goes spastic...

can anyone give a logical explanation as to why?

its not port velocity, and I dont think its SPL thats doing it... what other reasons could there be?

thanks!

Click to read more...

 

[azbass 5,000+ posts]

no sound . lame

 

[azbass 5,000+ posts]

and no one cares.

 

[Death By Bass 10+ year member]

no sound . lame

yeah, sorry about that, didn't realise sound was turned off... it was playing "Ultimate Bass Test" and the point where it moved most was somewhere around 30-33Hz...

 

[DBfan187 5,000+ posts]

watch out for those stingrays and dingos!

 

[tcguy85 10+ year member]

thats funny, that clip was actually just posted by somebody on here a few hours ago.

he posted about making some tower speakers or something.

nevermind u were the one that posted it.

 

[Death By Bass 10+ year member]

thats funny, that clip was actually just posted by somebody on here a few hours ago.he posted about making some tower speakers or something.

that was ME ya clown!!!

see, its 400cm^ of port area, 133cm^ of cone area... single 6.5inch woofer, and it does THAT, in a port with three times as much area as cone area? //content.invisioncic.com/y282845/emoticons/eyebrow.gif.fe2c18d8720fe8c7eaed347b21ea05a5.gif

 

[tcguy85 10+ year member]

yea i just realized that. oooppppps it's been a long boring night. i think i need a drink! lol

 

[iamamp3pimp 5,000+ posts]

is this a buildup of one of your designs?

 

[Death By Bass 10+ year member]

is this a buildup of one of your designs?

its a 110litre enclosure, "tuned" to about 40Hz... single 6.5inch woofer mounted in the top of the enclosure, next to the port....

but, why does the paper move so much?

 

[rpfuror 10+ year member]

your tuning to 40hz for a home speaker tower?

 

[Blove1991 10+ year member]

I was going to say that port was awful big and there was another sub in that box lol but since you made it or got the vids or whatever its legit?

 

[Death By Bass 10+ year member]

your tuning to 40hz for a home speaker tower?

ah... yeah?

I actually only need them to play down to around 50Hz, then the subwoofer will take over //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[Death By Bass 10+ year member]

I was going to say that port was awful big and there was another sub in that box lol but since you made it or got the vids or whatever its legit?

this is the internals of the enclosure...

i assume as its so long, it has 1/4 wave going on...

30hz 1/4 wave...

 

[Immacomputer 10+ year member]

Port air velocity is going to vary over frequency. At and below tuning, port velocity will be very high. This is completely normal.