Helpful Info

[tglisson 10+ year member]

Because woofers are specialized reproducers, their design maximizes their potential for reproducing the lowest frequency. Thus they will have cones that are suspended in such a way as to promote the maximum back and forth motion, called XMAX. Middle frequencies by contrast, have smaller cones and less excursion, or cone travel. Tweeters have cones, domes, or diaphragms that may seem practically motionless. Even so, they can produce sound in their frequency range that is just as powerful (and piercing) as their larger siblings.

Woofer cones must move in and out with the longest possible extension because sound waves get longer as they get lower in frequency. Current technology provides us with stiff and rigid cone materials such as Polypropylene, Carbon and Polymer Laminates that maintain their shape under stress, resist moisture, and are very light. The cone works as a piston to compress and alternatively evacuate large masses of air. To do this most effectively, the woofer must be connected to an amplifier that produces the high amplitude waveforms that can produce this motion. Because such signals require considerable electrical power behind them to control the cone movement, the highest power available is needed strictly for bass reproduction. Similar levels in the midrange and high frequency areas require comparatively little power for the same apparent loudness, all other things being equal.

Because of the powerful dynamic motions of the woofer cone, the frame or basket is often cast in a heavy metal to reduce the tendency for the speaker to "ring" at certain resonant frequencies. This arrangement also allows for the most precise alignment of the voice coil within the magnetic field and is particularly useful in speakers at or greater than 15" in diameter. In the larger drivers, after years spent resisting the tug of gravity, there is a tendency for the heavy magnet to be pulled out of alignment on the stamped frames of the larger sizes. This is of little practical concern with 12" and smaller woofers.

Magnetic structure design is fairly standardized with pole pieces constructed to put a concentrated magnetic field around the voice coil. Over the past 30 years, the magnetic materials used have changed considerably to permit ever-larger concentrations of magnetic energy rated in "Gauss" to be created from smaller quantities of lighter compounds. Coupled with the use of Kapton multiwound coils and more powerful amplifiers, speakers - when designed with even a modicum of commitment to high fidelity - can much more easily achieve that end.

For speakers to truly work well and achieve their maximum audio potential, they must be housed in an appropriate enclosure. Indeed without some elementary means of preventing the front radiated wave from interacting with the back wave, no bass would be heard at all. This is simply because the two waves are precisely 180 degrees out of phase with each other and cancel out when they meet.

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[gellis4 10+ year member]

None of the above..

And, wth is w/ the helpful info? I mean i think it's nice for you to try, but the information that you have provided is for numbnuts..

 

[Brock 5,000+ posts]

You need a spot for "None of the Above" //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif I didnt vote for any of those...

HCCA

 

[avistar23 10+ year member]

I was looking for that spot to. But my choice would Pioneer if it was there and don't come back and say oh adire is better cuse i know that, but pioneer is at least what ive heard and used.

 

[tglisson 10+ year member]

Originally posted by gellis4 None of the above..

 

And, wth is w/ the helpful info? I mean i think it's nice for you to try, but the information that you have provided is for numbnuts..

Hey bro noone asks for your thought, this is for knowledge only, if you know it then pass on, no need for hate notes, Brock props to you

 

[Brock 5,000+ posts]

you should add these to the list...

Shocker, Adire, Elemental, Resonant, Orion, Boston, Image Dynamics, Focal, and Volfenhag...haha

 

[tglisson 10+ year member]

Hey ya'll what do you think of these ?

·120 oz. Double Stacked Strontium Magnets ·Power Handling: 1000 watts R.M.S. ·Frequency Response: 18Hz -- 500Hz ·Efficiency: 96.4dB ·PHAT 1.75" EPDM Rubber Surround ·Spun Aluminum Cone ·3" 4-Layer ASV Voice Coil ·Dual 6 Ohm ·3 Ohm or 12 Ohm Operation ·Mounting Dimensions: Depth; 5 5/8" Hole; 11 ·1/8" Diameter; 12 3/4" ·Multi-connect Lug Lock Terminals

//content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

 

[avistar23 10+ year member]

Originally posted by Brock you should add these to the list...

 

Shocker, Adire, Elemental, Resonant, Orion, Boston, Image Dynamics, Focal, and Volfenhag...

been smoking weed again have we?.....heh....heh...j/k

 

[avistar23 10+ year member]

Originally posted by tglisson Hey ya'll what do you think of these ?

 

 

 

·120 oz. Double Stacked Strontium Magnets ·Power Handling: 1000 watts R.M.S. ·Frequency Response: 18Hz -- 500Hz ·Efficiency: 96.4dB ·PHAT 1.75" EPDM Rubber Surround ·Spun Aluminum Cone ·3" 4-Layer ASV Voice Coil ·Dual 6 Ohm ·3 Ohm or 12 Ohm Operation ·Mounting Dimensions: Depth; 5 5/8" Hole; 11 ·1/8" Diameter; 12 3/4" ·Multi-connect Lug Lock Terminals

//content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

what model is that ?

 

[tglisson 10+ year member]

im not a big fan of Volfenhag but my friends hit hard

this is my friends i installed for him

Bumped & Vented T-Yoke ·High Temperature 4-Layer Voice Coil ·Double Damper ·Heavy Duty Industrial Magnet Structure ·Push-Type Terminal Posts ·500 Watts RMS ·89.5 dB ·6.4" Mounting Depth ·Fs: 30Hz ·Qts: .526 ·Vas: 1.98 cu. Ft ·Qes: 0.614 ·Qms: 7.698

 

[avistar23 10+ year member]

Originally posted by tglisson im not a big fan of Volfenhag but my friends hit hard

We were jokeing about them....

 

[tglisson 10+ year member]

Originally posted by avistar23 what model is that ?

avistar23, ALUM12Q

 

[avistar23 10+ year member]

I have not seen / heard that one yet but SNOVA may know.

 

[tglisson 10+ year member]

besides flame Q's having 1100 RMS I believe these hit harder with only 1000 RMS, but I like my XPL's im either gonna sell my XPL's or bahns

 

[tglisson 10+ year member]

I believe I got them to 96dB