SOLD HAXO LXU (Crystal comp) 12 Underhung sub $120 shipped

[BLD 25 10+ year member]

I just bought this off sounddot brand new from ED, and it is a really nice sub. My amp isn't really the best match for it, so I am going to sell. It has been used for less than a couple of hours and it will ship double boxed. It is nearly mint since it is basically brand new. The only thing at all is that is a little rust on the bottom of the motor in the screw holes. This wasn't disclosed in the sounddot auction, but i wanted to be 100% clear.

$120 shipped

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[BLD 25 10+ year member]

bump

 

[mendon mafia 10+ year member]

whats this thing take daily?

 

[fast85_gt]

whats this thing take daily?

x2

 

[1ndatrunk 10+ year member]

What does underhung mean and what does it do? I'm interested just from the looks of it

 

[x2o 10+ year member]

What does underhung mean and what does it do? I'm interested just from the looks of it

Underhung has to do with how the voicecoil moves in the gap. Note the very long and sloping top plate. Similar to the old ('05) RE XXX's.

 

[BLD 25 10+ year member]

sorry, specs are at http://www.haxosounds.com

underhung is a different way that the voice coil stays in the gap to provide a more linear travel.

crystal has some more info also:

http://www.crystalmobilesound.com/literature/COMP%2012%20Spec%20sheet.pdf

 

[chaunb3400 10+ year member]

Bump for a Badass sub..I use to own Crystal CompX's and I loved them...That price is a steal

 

[x2o 10+ year member]

There's a pic from wikipedia. Here's an explanation

The most common method is the overhung design where the height of the voice coil is greater than the magnetic gap's height. The underhung design which is used mostly in high-end speakers has the coil's height smaller than the gap's. The differences, advantages and disadvantages of both methods are given in the table below.

Overhung coil

• Coil height is greater than the gap's height.

• This method keeps the number of windings within the magnetic field (or flux) constant over the coil's normal excursion range.

• Higher coil mass, sensitivity medium to high.‡

• Soft non-linearity as the coil exceeds limits.

Underhung coil

• Gap's height is greater than the coil's height.

• This method keeps the magnetic flux that the coil experiences, constant over the coil's normal excursion range.

• Low coil mass, sensitivity low to medium.‡

• Hard non-linearity as the coil exceeds limits.

Here's the details I was able to find off wikipedia, hope it helps. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[1ndatrunk 10+ year member]

Thanks, but does it make it louder than an overhung or what? What is the purpose other than the weight

 

[1ndatrunk 10+ year member]

Any trades? me please

 

[x2o 10+ year member]

Not talking factual, but generally underhung subs are used more for SQ, while overhung are used in SPL drivers.

THIS IS NOT A 100% FACT, AT LEAST I'm not sure if it is, but from what I have seen, it's true. I don't think I've seen a true underhung SPL sub..

 

[BLD 25 10+ year member]

^^^yep, that is what i was saying about it being more linear. Not trade interests really right now.

 

[BLD 25 10+ year member]

pending

 

[02parkave 5,000+ posts]

Underhung has to do with how the voicecoil moves in the gap. Note the very long and sloping top plate. Similar to the old ('05) RE XXX's.

The old xxx were NOT underhung subs. underhung has small coil, large top plate. the coil never leaves the gap. overhung the coil is generally 1/2 out of the gap at rest. it uses a larger coil (more winding width.