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
if you do this. it'll help you. some sunny day ...
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!
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...
My sign is Sagittarius, I'm into Spanish cheese, my hairline is receding but I'm getting a weave. Who wants some Ronald tonight?
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.
if you do this. it'll help you. some sunny day ...
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...
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
if you do this. it'll help you. some sunny day ...
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....
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
Alpine SWR-823D / 843D 8" Subwoofers
why I ever sold it I will never understand..... well it had its compatibility issues I suppose?)
(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 
Linear Mode
