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Old 03-18-2011   #1
 
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Default Alpine SWR-823D / 843D 8" Subwoofers

Hey Everyone,

I've chimed in on a few threads talking about the new 8"s, but promised I'd make my own thread with details and a little Q&A for everyone ... so, here's a basic rundown of some details on the new 8" subs we are launching here in the next few weeks.

Some highlights:

Segmented Motor Structure w/ 1pc Frame and Shorting Ring
There a 6 magnets, radially segmented and aligned around the shorting ring/frame/heatsink. The shorting ring is connected to the frame via three legs that allow the entire frame to act as a heatsink. We intro'd this design with our 2010 Type R 10" and 12" and we've carried this into the new 8"s as well …. it’s a pain in the butt to tool and assembly but the results are worth it. Check out the cut-view model, you can see on the left side, the shorting ring is directly connected to the exo-skeleton of the frame with one of three radial ribs the fit through the segments in the magnets.

Result:
Great Power Handling: 350W RMS / 1000W Peak Power Handling
Super Low Inductance: 0.55mH (843D) / 0.67mH Le (823D) and its very well tamed and symmetrical with respect to both displacement and current. Graphs attached.



H.A.M.R. Surround and FEA Optimized Spider

Just about perfect progressive compliance that is light and soft enough for super fast transients, but strong enough for full-power operation while unloaded in a vented enclosure or in free-air IB.

Result:
Durability: If any of you have been able to come to our CES Roadshow trainings, you’ll see the 823D run free-air at full clip on an M6 without a hiccup.
Sound Quality: We’ve actually been running these as midbass/front subs (56-250Hz/20-250Hz) in the Camaro Demo car. The speed, accuracy and power of these guys in astounding! I’ve got an 8W3 here and an IDQ8 and they can’t hold a candle to it, especially when you get some real power into them (to my ears at least). This SQ isn’t only a function of the suspension, but during my final approvals, I found the difference in suspension materials to play quite a critical role … so I give the suspension credit here. Graphs attached.


CRC Pole Piece / High-Grade Y40 Magnets
14mm of Klippel verified Xmax (70%) stands out from the crowd not only in linear stroke, but also in symmetry. These are extremely well controlled woofers. Graphs attached.

Result:
High-Output: These aren’t Jacob’s crazy eights … but they’ll get more than plenty loud and keep their composure while doing it. I absolutely love these in 0.50cubes @35Hz … tons of output for any sane person and a pair of them will smile all day on a PDX-M12.
Small Box Requirements: In the CES Demo Camaro, we’ve got them in a plate steel enclosure roughly the size of the woofer’s magnet (0.1-0.2 cubes). For a QTC of 0.90, try a quarter cube. Essentially, they work in boxes smaller than the shipping container they come it. Ported, 0.3-0.5 cubes and keep them in the mid to upper 30s … and they’ll do it with SQ to boot in a vented enclosure.
Efficiency: They are 8s, so no 88dB numbers here, but they are 83.5dB efficient and have the excursion and power handling only to get louder from there.

That’s all I can think of for now. Feel free to ask any questions and I’ll be happy to answer them as time permits.
Thanks,
Jim
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Old 03-18-2011   #2
 
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Default Re: Alpine SWR-823D / 843D 8" Subwoofers

I don't see a vent at the rear of this sub, does that mean that i can be mounted with the rear right up against the back of the box like your W0 subs?

If so, would a pair of these offer a noticeable upgrade in SQ and performance over a pair W0 10"'s?
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Old 03-18-2011   #3
 
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Default Re: Alpine SWR-823D / 843D 8" Subwoofers

Quote:
Originally Posted by usmcsoldriver View Post
I don't see a vent at the rear of this sub, does that mean that i can be mounted with the rear right up against the back of the box like your W0 subs?

If so, would a pair of these offer a noticeable upgrade in SQ and performance over a pair W0 10"'s?

Yessir, no vent in the backplate means the mounting depth of 4.5" is the exact depth of the box, no clearance needed.

PS - This is Alpine, not JL (they make the W0).

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Old 03-18-2011   #4
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Default Re: Alpine SWR-823D / 843D 8" Subwoofers

Are all of the ts parameters available, yet?

Have stuff. Makes noise.
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Old 03-18-2011   #5
 
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Default Re: Alpine SWR-823D / 843D 8" Subwoofers

Quote:
Originally Posted by BEAVER View Post
Are all of the ts parameters available, yet?
Yep, forgot those in the first post. Ask and ye shall receive. 823D on the left, 843D on the right.
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Old 03-18-2011   #6
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Default Re: Alpine SWR-823D / 843D 8" Subwoofers

Thanks Jim!!!

Can you post some porn here for us to drool over please?
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Old 03-18-2011   #7
 
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Default Re: Alpine SWR-823D / 843D 8" Subwoofers

WoW. where is my head at. As if I don't know the difference between Alpine and JL.
Mulligan?
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Old 03-18-2011   #8
 
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Default Re: Alpine SWR-823D / 843D 8" Subwoofers

Quote:
Originally Posted by Salami View Post
Thanks Jim!!!

Can you post some porn here for us to drool over please?

I've got some footage on the Klippel and in-box, but I can't attach a .mov here. Booo!

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Old 03-18-2011   #9
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Default Re: Alpine SWR-823D / 843D 8" Subwoofers

Jim, I know its been said countless times BUT....THANK YOU for taking your time and being an active member here. Our greatest asset here on the forum is the amazing company representatives that are willing to show and share there time and knowledge. There are some great ones too! I am thoroughly interested in several new alpine products (the h800 + w910) and these 8s are certainly intriguing as I am an 8" fanatic!
I am really excited with the new line up and I have been severely dissapointed with some of the product lines over the last decade or so (exception being the F#1 setup I had why I ever sold it I will never understand..... well it had its compatibility issues I suppose?)
Any idea what the msrp is expected to be on these? I just stopped a local shop about the h800 and got a very good $ on that (I feel it was good anyway?) and supposedly due in April? Can we expect the same for the w910 and these 8s? Upon play time of the 910 I may end up with a largely badged alpine system???? who woulda thunk it
Again, thanks again for all your time, efforts, and knowledge, its greatly appreciated!
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Old 03-18-2011   #10
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Default Re: Alpine SWR-823D / 843D 8" Subwoofers

Quote:
Originally Posted by jim walter View Post
I've got some footage on the Klippel and in-box, but I can't attach a .mov here. Booo!

I don't need no stinkin' video. Give me some good old fashioned porn!!!! Big old pictures!!

Want to see the booty and the front.
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Old 03-18-2011   #11
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Default Re: Alpine SWR-823D / 843D 8" Subwoofers

all I know this is the 2011 product im waiting for, ive already saved up the cash

cant wait till they are released
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Old 03-18-2011   #12
 
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Default Re: Alpine SWR-823D / 843D 8" Subwoofers

*subscribed*

All teh bass belongs to RE :eek:

Check Out Tempe's Car Audio Bible!!!
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Old 03-18-2011   #13
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Default Re: Alpine SWR-823D / 843D 8" Subwoofers

These sound pretty cool. Definitely in it for pics!

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Old 03-19-2011   #14
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Default Re: Alpine SWR-823D / 843D 8" Subwoofers

Doesn't show much but I found this on Caraudiomag.com

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Old 03-19-2011   #15
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Default Re: Alpine SWR-823D / 843D 8" Subwoofers

Quote:
Originally Posted by jim walter View Post
Result:
Great Power Handling: 350W RMS / 1000W Peak Power Handling
Super Low Inductance: 0.55mH (843D) / 0.67mH Le (823D) and its very well tamed and symmetrical with respect to both displacement and current. Graphs attached.
Result:
High-Output: These aren’t Jacob’s crazy eights … but they’ll get more than plenty loud and keep their composure while doing it. I absolutely love these in 0.50cubes @35Hz … tons of output for any sane person and a pair of them will smile all day on a PDX-M12.
rated at 350 but they love 600? just wanted to make sure i was reading that right. my collection of 8s may be getting bigger soon...

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Old 03-19-2011   #16
 
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Default

Quote:
Originally Posted by nineball View Post
rated at 350 but they love 600? just wanted to make sure i was reading that right. my collection of 8s may be getting bigger soon...
MMmmmaybe

I was a bit conservative with rating them, but you got to realize that we have to recommend/set a good Power level where there's good reliability for ANY listener regardless of abuse. I could break them with a M12 but I'd have to try and listen through a lot of distortion to get there.

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Old 03-19-2011   #17
 
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Default





That's all I've got here on the phone for woofer porn. Monday I'll get some raw parts shots for you guys.

Jim

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Default Re: Alpine SWR-823D / 843D 8" Subwoofers

Nice teaser pics! I'm looking forward to hearing these. Thanks for the heads-up on them.

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Old 03-19-2011   #19
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Default Re: Alpine SWR-823D / 843D 8" Subwoofers

They "look" great!!!!!!!! We really needed some fresh blood in the 8" area! I will absolutely buy a set when they are available...I am an 8 fanatic and there are maybe a handfull I have yet to use.... These I am excited for The newer Type R lines have really been extremely nice woofers in all aspects of use...
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Old 03-19-2011   #20
 
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Default

Quote:
Originally Posted by rexroadj View Post
Jim, I know its been said countless times BUT....THANK YOU for taking your time and being an active member here. Our greatest asset here on the forum is the amazing company representatives that are willing to show and share there time and knowledge. There are some great ones too! I am thoroughly interested in several new alpine products (the h800 + w910) and these 8s are certainly intriguing as I am an 8" fanatic!
I am really excited with the new line up and I have been severely dissapointed with some of the product lines over the last decade or so (exception being the F#1 setup I had why I ever sold it I will never understand..... well it had its compatibility issues I suppose?)
Any idea what the msrp is expected to be on these? I just stopped a local shop about the h800 and got a very good $ on that (I feel it was good anyway?) and supposedly due in April? Can we expect the same for the w910 and these 8s? Upon play time of the 910 I may end up with a largely badged alpine system???? who woulda thunk it
Again, thanks again for all your time, efforts, and knowledge, its greatly appreciated!
Thanks and youre welcome It's been a fun ride since CES this year, we've been hearing a lot of good feedback from old school Alpine fans.

These subs are actually shipping in about 10 days. MAP is $159

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Old 03-19-2011   #21
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Default Re: Alpine SWR-823D / 843D 8" Subwoofers

Quote:
Originally Posted by jim walter View Post
Thanks and youre welcome It's been a fun ride since CES this year, we've been hearing a lot of good feedback from old school Alpine fans.

These subs are actually shipping in about 10 days. MAP is $159
Thanks! Phone call is being made
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Old 03-19-2011   #22
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Default Re: Alpine SWR-823D / 843D 8" Subwoofers

Always wanted to ask why the Type E 8" never got to the USA?

Kelvin

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Who knows, some might understand now
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Default Re: Alpine SWR-823D / 843D 8" Subwoofers

Quote:
Originally Posted by jim walter View Post
Thanks and youre welcome It's been a fun ride since CES this year, we've been hearing a lot of good feedback from old school Alpine fans.

These subs are actually shipping in about 10 days. MAP is $159
Jim, thanks for being a member here. Your input as an industry professional is much appreciated.

And - you just sold one. I have been looking for a decent 8 for my wife's car. And the specs of this sub seem right up the alley. And the seller was the keyword "IB".
It'll be in the factory rear deck location of her new car, obviously reinforced to take the weight. Any estimated weight on these things, anyway?

If the sub is properly designed be be truly IB-capable, it will be awesome for many of us here in a similar situation.

I will be heading to the local dealer tomorrow and see if he can get me one when they're released.

I've also got this strong vision of 4 of these with 600 per in a low tuned (32hz, give or take) vented enclosure. Would not take up a lot of room.
May be a fun project, the cost is definitely low enough to try out....
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Old 03-19-2011   #24
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Default Re: Alpine SWR-823D / 843D 8" Subwoofers

Quote:
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Jim, thanks for being a member here. Your input as an industry professional is much appreciated.

And - you just sold one. I have been looking for a decent 8 for my wife's car. And the specs of this sub seem right up the alley. And the seller was the keyword "IB".
It'll be in the factory rear deck location of her new car, obviously reinforced to take the weight. Any estimated weight on these things, anyway?

If the sub is properly designed be be truly IB-capable, it will be awesome for many of us here in a similar situation.

I will be heading to the local dealer tomorrow and see if he can get me one when they're released.

I've also got this strong vision of 4 of these with 600 per in a low tuned (32hz, give or take) vented enclosure. Would not take up a lot of room.
May be a fun project, the cost is definitely low enough to try out....
I am thinking two ported in my center console (similar porting freq.) with similar Power Could get interesting
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Old 03-19-2011   #25
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Default Re: Alpine SWR-823D / 843D 8" Subwoofers

actually I might be able to toss 3 in there
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