High Excursion 8 Inch Woofer. Is Their Such A Beast?

This might be a guide.

The trick is in finding one.
http://www.diyaudio.com/forums/showthread.php?postid=284436#post284436

Peerless 8" HDS woofers have 5.5mm of Xmxax, thats quite close to high excurtion as an 8" is going to get, i also think that the adire AV8 has a reasonable xmax and it also models very nicely, something i personally am a bit causious of.

Try this, Steve says 4.9mm xmax

http://www.apexjr.com/SuperSub.htm

Andrew

I've found a few...

There's the ApexJr Super 8 mentioned above...

There's the Adire AV8 mentioed above...

There's a Tang Band one that graphs really good for real cheap, of which, as mentioned above, can be a little skeptical.

Also, you could check out JL Audio 8W0, or 8W4 etc. I know they're good.

I believe the cheapest are probably the Tang Band and the ApexJr. Hard to judge how good they are without trying them.

Pete

Someone like John at Stryke Audio needs to start carrying the high-excursion 8" that TC-Sounds builds.

Have you had a look at these ?

http://www.paudio-europe.com/products/db_product_1_27_tm-8.htm

Cannon sound, in OZ have the 12" version on sale, I wish i could justify buying a pair or two.
They might be just the thing for a dipole sub

That PAudio TM-8 certainly looks like a great 8" woofer.

A mail order house in America sells the 10" and 12" version of it. The 12 inch is $420 and the 10 inch is $390. I think we see a pricing trend here....

Very cheap, and quite high excursion is the TB W8-740c, found at www.nuera-acoustic.ca.

Inexpensive, and they ship out of both the US and Canada, so shipping isn't bad at all.

Their listed 12mm xmax is right on the money, being measured by the (vc height - airgap height) /2 method. Very good power handling, despite their low rating in the datasheet. I've personally pushed 200W RMS (brownish noise) through one for an hour or so with no ill effects.

I'd like to see a little better suspension travel out of them to go with the 12mm one-way xmag, but it's about as good as can be expected within the confines of a small 8" diameter basket and a smallish diameter spider. I'd estimate it at about 16mm or so. At any rate, an excellent performer for its size.

There is the Eclipse 87081.4 with a huge excursion.

Here is the home page to download the pdf specs:
http://www.eclipse-web.com/products/speaker/87001dvc/87081_4.html

Seems to be selling reasonably cheaply on Ebay:
http://search.ebay.com/search/searc...=&ebaytag1code=0&st=&SortProperty=MetaEndSort

Does not mention symmetrical magnetic system-though I think it probably has one. Does not mantion SPL-some of these extremely long throw designs can have really low SPL's.

ThingyNess said:

Their listed 12mm xmax is right on the money, being measured by the (vc height - airgap height) /2 method. Very good power handling, despite their low rating in the datasheet. I've personally pushed 200W RMS (brownish noise) through one for an hour or so with no ill effects.

Click to expand...

No mention of a symmetric magnetic field. That is usually done with either an extended pole piece or a shorting, (Faraday), ring.

Normally, I would think an 8 inch for $29 would not have a symmetric system-but then you would not think an 8 inch for $29 would have 12 mm Xmax with either. Tangband seems to have a lot of features you would not normally expect.

Thingyness, have you put these into a vented box, then run a frequency test to see how the woofer behaves near resonance? A woofer can perform fine in a closed box, but shear off half the waveform near resonance in a ported box.

I would strongly recommend a symmetrical field for anyone using a woofer in a vented box.

Omnifex-are these enclosures vented or sealed?

Peerless 8" XLS

Peerless have a 830491 which is a 8" XLS with an Xmax of over 10mm based on the 8" HDS and is available in Australia from WES Components: http://www.wescomponents.com/

Some details:
http://www.d-s-t.com.au/Data/Peerless/830491.pdf

What are these speakers, 2 way? 3 way? Very high excusion woofers, even 8" ones, are usually more designed for subwoofer applications, and likely wouldnt have as good of upper bass, lower midrange characteristics, IF they would need to do this in youre system

Where are you from by the way? I pride myself on having a higher knowlege of geography than a typical american (not very hard!), but can't place youre flag

well, sounds like you've found youre driver. One thing I'd say, the tc2 has a listed xmax of over 16mm, I'm sure that is two way, which would bring its one way xmax to over 8mm, still very very high for an 8" driver.