svpmx83

Drivers only for me if it can be confirmed they will fit '81 door cavity

Calibre26

Hans,

I am interested in a complete set, as well ...

J

'87 S4 - Great White North Edition

hacker-pschorr

78-83 have a single 4x6 in the door. The indentation behind the speaker in the sheet metal is centered on the magnet. Even if you swap door panels these will not fit unless you pound out a larger indentation or cut some holes.

Hans is willing to do the same for the early cars, he just needs an original 4x6 speaker to model around.

hans14914

Here is the next evolution of the drivers. On the first batch, the carbon fiber was the winner. So, we went back and looked at ways of optimizing the driver further. The dustcap was reduced a bit yielding a bit higher inductance, but the sensitivity went up across the board and pushed the breakup out a bit farther. This one looks usable out to almost 7khz, the last version rolled off sharply at 5khz. This takes some load out of the tweeter if necessary, allowing for a crossover frequency as high as 3.5k or can just reduce the slope for a simpler overall crossover - which is the likely plan.

I dont have them yet, but will soon, and will report back on listening data. The last drivers had great imaging, I think those who can justify the cost of these drivers will be very happy.

Thanks
Hans

Rob Edwards

Damnit, stop posting this stuff! I had no intention of buying a Sharkwoofer until I saw Hebert's prototype, and now this! Sigh.

Bill Ball

I'm in on these. I did find some workable Audiobahns years ago (now discontinued) that fit and look stock grillwise and came with tweeters that snapped into the stock mount, but your drivers should be a huge improvement.

Also, I would sure like it if you could steer your talent towards a substitute 6.5 for the rear bolster. The factory units (at least 89+) had pretty tight bass when they were new and were designed for the free-air environment there. I've tried everything I can find in that size including the honking JL WO3 (discontinued) that required cutting out some of the framing behind the speaker and the bass is lacking. Some polyfill and attempts to seal the cavity helped, but I've never been happy. So, I understand your tirewell sub, but I'd prefer keeping the factory configuration and I think it could work well with the right 6.5" driver. It wouldn't be a hip-hop thumper, but clean, tight bass is what I want.

hans14914

Bill,

I am actually working on a larger driver similar to the 4" with a slim motor assembly, but the idea behind these 4" drivers is that they are being created to mate well with as subwoofer directly.

My hopeful thinking is that I can encourage people to replace their in-door speakers with this setup, and then run a subwoofer in the spare tire area, and just retire all the other speaker locations. So, these components will cost more, but require less channels of amplification and less overall number of drivers.

I will let you know how this theory pans out when the new drivers come in.

Thanks
Hans

blown 87

Couple of questions, you are talking about running a 3 channel system?

How are these speakers going to rate against a setup using the MB Quart fronts and rears with the Sharkwoofer?

They are pretty.

hans14914

Greg,

I am proposing a total of 5 drivers: pair of 4", pair of Vifa NE series 3/4" tweeters, and subwoofer (ideally Stereo Integrity when they get back in stock).

I am looking at building matching 7" with the slim motor configuration, but not sure I can justify the development costs and minimum order quantities with the wide availability of compatible drivers.

Thanks
Hans

Strat_928

Sorry - they look very cool, but I just upgraded using 6.5s in the back and 4's in the front along with an external sub in the hatch are. I have an 83 and the depth is no problem as long as you top mount and I thought these Infinitys look pretty cool and actually update the interior some without looking cheesy. Sound great.

Here is the writeup at 928OC

http://forums.928oc.org/vbulletin/showthread.php?t=609

Tom in Austin

Lookin' good, keep it coming ...

brealytrent

I'm pretty sure the 924/944 crowd would be interested in some 4x6 versions, as are cars came with similar (or the same) speakers as the early 928s. I think I may have one of the old blown up ones in my garage...

hans14914

These are about the slimmest 4" drivers you could make (with an eye towards quality/usability). If anything was going to fit in the factory 4x6 location, these will. If you want to send me a blown driver, can toss it into CAD and machine an adapter plate to hold these and the 3/4" Vifa NE tweeter I plan on using. I could probably even attach the crossovers to the back. It may end up being one of the more expensive 4x6 options, but it would sound really good.

brealytrent

I've only gotten a couple responses so far, and they are willing to pay around $150 or so for a pair so far... What's the ballpark for the setup you suggested?

hans14914

It would certainly be more than that. The cost for goods/components would exceed that alone.

It will not be a "bargain" type setup. However it will be a good value. The company who I am looking at splitting the first production with is planning at marketing these drivers in the ~$300/pair range (that is raw drivers alone in retail packaging). I will be going a different route, with minimal concern to packaging and offering a complete kit for the 928 (and possibly other P-cars). These are designed to spank the current "reigning" 4" slim drivers, the Focal 100VRS if that helps you get an idea of where these will lay in the field if they do go into a full production run.

Thanks
Hans