sundownz

I should have the midrange final prototype in my hands on Monday... assuming it is 100% to my liking I will announce pre-order pricing as we have already started to get materials together for the tweeter, crossover, etc.

Response graphs of the mid (with off axis) and the tweeter -- the thick vertical line represents the crossover frequency. As you can see it is very appropriate on this set to get a nice response from both drivers : We will measure them in my car too once the new mid arrives.

So it is a bit confusing due to several updates along the way... so the above should help out when ordering a re-cone kit. We need to know what version you have to built the correct kit. Aside from the box printing being a bit mis-leading it's not super hard to understand using the above picture. The 60 unit run of "v.2" woofers (v1.75) was only sold to a few people who knew up front about what they were -- I just had the factory put v.2 on the box so we would know what they were as we unloaded the truck. But I am sure someone will get one of them second hand. They can be re-coned to standard v1.5 parts with copper coil and hard spider. As the photo indicates the baskets cannot be swapped around. This is due to a bolt pattern variation -- some savvy users have drilled their own patterns and that is fine as all version v1 through v1.75 have compatible motors -- there is only a slight gap variation across generations of those but not enough to make a significant difference when using them together. The actual v.2 model is COMPLETELY different. Someone would have to make custom adapters and/or drill and tap the top plate of an older motor to use the basket. I am not planning to offer this adapter.

I should have the new mids in my hands soon to do testing -- I also got the factory response graphs including off-axis that I will get together and put up soon... then we'll do some RTA in my car; which is a very typical install and nothing fancy.

Got some factory pictures just now -- it's shipping to us soon. Assuming all goes well we'll start production of this and the 2500D v.2 very soon! * I had mentioned we were working on double inputs but it wasn't going to work out with the narrow casing. Outside of dedicated SPL the difference is not significant, though. * We got the production RCAs on this prototype. * BEEF

Not really in the bigger sizes.

There is no inherent reason you can not port them; but they are being tailored to sealed boxes.

I am happy with the mechanical behavior and observed thermal behavior so far playing them in free-air -- specs measured before break-in indicate I MAY have to make some small tweaks to it with the mass and compliance but it's about 90% there.

Just got these in... designed them based on many requests for a really good sealed box 8" woofer. Power rating is pending testing but mechanically I designed them around 300 watts or so (half the spiders of the SA-8 v.2) -- we'll do our thermal cycle to determine the official rating. As is typical with our products the rating giving will be a "worst case" rating and many people will have no problem running a bit extra. We built upon our newly tooled platform from the SA-8 v.2 so it shares many of the advantages of that platform from the get-go. These feature an under-hung coil with predicted linear x-max of ~14.5mm one-way by 70% BL method using an 8-layer copper 2" coil with 1/2" of winding width. The total depth for mounting is right at 4.75" measured, I will be measuring actual T/S on them later on today after some break-in time. Pricing is also pending final costs from our parts suppliers. On to the photos : * E8 v.2 then SD-2 8" then SA-8 v.2 * For this design I used drilling in the basket as opposed to the vent ring to save depth. * Solid pole like the other SD-2 woofers so there is no need to leave room to breathe behind them. * Same spider as the SA-8 v.2 but only one layer (top layer)

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Just to make sure I understand : 1) How many Z v.3 12s do you have ? Just one ? 2) If you have just one woofer... you are in the region we suggest for TWO Z v.3 12s in a ported box with 3.7 cubes. You are using nearly 4x what we would suggest sealed for a single Z v.3 12" but I would really not suggest sealed as optimal as you will have a lacking bottom end compared to a woofer better for sealed and/or this woofer ported. These have very powerful motors geared towards ported and they will move ALOT in a super large box, especially sealed where there is no port to restrict movement around tuning.

I will consider a rubber boot around the magnet but I don't think I will do any plastic.

Making some progress on the finalized mid... the cone material turned out great on the first sample so we've moved onto the rest of the details : * Cone mounted on the new frame * Side view with the cast frame * Gap venting implemented... the finish is NOT final it is only for sampling. * The final finish will be smooth with chrome plating... will look VERY nice and also will be very corrosion resistant.

These arrived Friday; we'll be shipping this week coming up. So the pre-order is over... we do still have some in stock @ regular price.

I think it will work out pretty well -- we will be doing some measurements once I get them put into my car.

Oh I forgot to put supply voltage in... woops. On the lower power figures we had around 13-13.3v and at higher power 12.5v at the time of measurement (my meter reads about 3-5 seconds in to the tone)

12v clamp testing : 2420 @ 1.86 ohms 67.1v 36.06a 2490 @ 1.57 ohms 66.2v 42.1a 2750 @ 1.40 ohms 62.1v 44.3a 2950 @ 0.94 ohms 52.4v 56.3a Very pleased with that. It is right on par with the v.1 model -- we will do typical minor tweaks on production and maybe squeeze a few % more out of it. As usual this was done on my Extech power clamp; it reads power out directly very accurately. I use measured voltage to calculate amperage and then actual impedance. Once I get a handful of free time I will do a 16v round-up with all of the new prototypes.

The amp is here at the shop : * The main capacitor bank now contains 160v units for maximum reliability at 19v operation. * As with the other new 2012 amps we have a fan * 16x IRF064N power supply MOSFETs (BEEF)

This is the type of driver we are aiming this set at : http://www.madisoundspeakerstore.com/scanspeak-woofers-6-7/scanspeak-illuminator-18wu/4741t-00-7-woofer-4-ohm/ Scan did the wide open design for good reason We are going as open as practical without getting quite so deep.

The motor would be too wide and heavy in Ferrite, IMO. We are trying to keep reflection on the motor down as well -- a big flat top plate and magnet right behind the cone isn't what we want.

What are you looking at for xover point? 3800 Hz -- which I suppose isn't high per-se but not low either

Silk

Some people will prefer a shallower slope on the LPF -- just a bit of choice for the end user.

Here is the frame I will be using on the set (cast aluminum) -- as I said initially this first prototype is mainly to test / verify the cone material performs like I want it to. This frame is only a few millimeters deeper than the stamped unit... total depth is going to be about ~66mm which is 2.59" I am also thickening the back plate, doing some small motor modifications, and adding ventilation to the back plate as well to help relieve pressure / back-wave reflections and to keep coil temperatures down. I'll be putting the initial set in my car shortly... then I will be getting the revised midranges as quickly as possible. Once I verify everything we should be ready to roll soon after on production assuming it all checks out in my testing. Also... I expect MAP price from a dealer to come in under $200

Sundown E-10/12/15 and SA-10 D4 Back In Stock Just finished unloading and sorting the container. So they are ready for order once again. Re-cone parts for the E series also arrived so I will work up pricing for kits soon. I have heard very minimal need for the parts but I'm sure they are a small handful out there somewhere.