Just good times.
Acoustic Elegance AV15
- Thread starter bumpin buick
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RAM_Designs
5,000+ posts
SketchUp Master
This thread delivers.
Just a quick note on papermaker's woofer that came in about 5min ago. I'll have pictures posted up shortly once i can get them off the camera. The cone is ridiculously bent up. The surround is torn off the cone at one point. The spider is not "worn out", it is actually torn halfway around on one side of the coil from being driven much too far.
The only way for all of the above to happen is simply abuse. The driver has 23mm Xmax and about 30mm travel before the suspension can't physically go any farther. It is not meant to move farther than this. This is more than enough to get high levels of clean output for any SQ type application this woofer was designed for.
If you plan to try to repeatedly drive the woofer past the physical limits, it can and will break. A subsonic filter is necessary in a vented box to prevent over excursion. That is what they are for. Also I feel the need to stress this again, there are reasons the woofer is rated at 1000W and not 1600W and not specifically intended for SPL application.
John
The only way for all of the above to happen is simply abuse. The driver has 23mm Xmax and about 30mm travel before the suspension can't physically go any farther. It is not meant to move farther than this. This is more than enough to get high levels of clean output for any SQ type application this woofer was designed for.
If you plan to try to repeatedly drive the woofer past the physical limits, it can and will break. A subsonic filter is necessary in a vented box to prevent over excursion. That is what they are for. Also I feel the need to stress this again, there are reasons the woofer is rated at 1000W and not 1600W and not specifically intended for SPL application.
John
for those interested, here are some pics of the woofer papermaker sent back. If someone wants to believe it was build error that caused this, that is your choice. There is however nothing on earth I can do to keep someone from bending the spun aluminum cone, tearing the 100% nomex spider, and ripping the surround off, actually peeling the santoprene in half over most of the detached area.
This is under no circumstances something that happens under normal usage.
John
This is under no circumstances something that happens under normal usage.
John
Papermaker85
5,000+ posts
Banned
it wasn't torn, nor was the con folded that bad, i checked it several times, sorry the woofer did do what you claimed.. the surround came off in about a 2" section.. it folded in 2.8 cubes tun to 32 with about 1200, i could have ripped it apart above 60.. look at the glue joint push the spider you can see its not linear, i did abuse it but after waing 7+ weeks and after about 10 hours of break in at moderate voulume i still had to cross it @ 50.. i don't want a woofer i have to cross that low.. sorr your driver failed crossed above 60hz.. say what you like, but i gave you 2 fair chances definded you for months only to get a terrible peaky terriblly weak driver...
Papermaker85
5,000+ posts
Banned
in the spider pick, you can see how the first rool is very non-linear to the rest of the rolls... thats the reason it was uncontrolled... anyways, good luck in the future...
I'm honestly not going to waste any more time on this. If you cannot see that this woofer was clearly abused then there is just really no hope to change your mind of this.
John
Yes, it is non-linear because about a 1.5" is torn. Obviously that part is not going to move the same as the rest of it. The spiders are again 100% nomex. Nomex is made specifically for it's high heat resistance and high durability. To tear the nomex takes tremendous amounts of force.
http://www2.dupont.com/Personal_Protection/en_US/products/Nomex/firefighter/index.html
John
How do you separate the glue joint at the cone without tearing the surround like in that pic above???? Isn't the adhesive supposed to bond stronger than the materials it's bonding to??
Dan Wiggins
10+ year member
XBL^2 ownz j00
You are correct dear sir. However it seems that there was a poor choice in the adhesive used in this driver or the substrate was not free of contaminates apon application. I too have had issues with this in drivers that I build and sold to the general public with full knowledge of the defect and still sold them to the general public.
bose301s
5,000+ posts
I can break these cuffs
Where is the glue joint separated? It looks intact to me. Unless you mean the surround glue joint.
whats with the hating.. jeeze
clearly the driver was abused. Ive had my sub a solid week with close to 1000 w rms on it and its in perfect condition.
just got back from the gym, Chonkyfire FTW, that brings back memories.
clearly the driver was abused. Ive had my sub a solid week with close to 1000 w rms on it and its in perfect condition.
just got back from the gym, Chonkyfire FTW, that brings back memories.
bose301s
5,000+ posts
I can break these cuffs
Yea, someone has made SNs of some company owners, Dan Wiggins, Jonathon DeMuth, Thilo Stompler, probably all the same guy, it's actually pretty funny IMO.im sure you have mr 1 post
There are only about 3 drivers in hand to members of this forum atm..
i call bs.
Wow, that is over the top. John, just ignore this BS.
Ok, so you pushed it to the point where it folded - but not that bad. It is clear that you deliberately pushed it beyond its limits. Not sure why, but perhaps you just wanted to start an E-argument.
Folks are intelligent enough to read through all of this and form their own conclusions. Stop trying to prove a "point" - it is not working and no one is listening to you. Just stop it.
You almost had me fooled until I read the last sentence //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif
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