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Hello from Martinique , A friend of mine, a box builder for a shop here, is upgrading is sound system. He's going from 1 SSA xcon 15" on 2 Sundown saz 1000 d amps to 2 xcons on 4 saz 1000d. We bought the design from someone on this forum ! The box is made in 2 parts : one for each sub. Totally independant chambers and ports. 2 exactly same boxes. For the mids (2 8" Davis Acoustics speakers on each front door)he will use a JBL amp (px 300.4) and for the highs(several 5.5" speakers and tweeters, all Davis) he will use a new amp : the JBL 100.4. Doors and trunk are already deadened with SecondSkin Audio Damplifier and Damplifier Pro. Here are some pics of the box build.

How about just voting for the one that deserves it?

How about a saz2500 they are on pre sale for 525 shipped but do it soon as. Pre sale ends July 4 th

Erm, no.

Long subject. Unimaginably long subject. I'll try to condense it down into a digestible version. We localize midbass in the lateral plane only (i.e. left to right). We don't localize it on a vertical plane (high and low), and we don't localize it "front to back". Midbass is localized by way of what's known as Interaural Time Difference (ITD). That is, the brain localizes midbass laterally due a difference in the time arrival of the sound wave between the left ear and right ear. ITD dominates our localization ques in the frequency bandwidth where the wavelengths of the soundwave are longer than the distance between our two ears. Generally the more ITD you can generate, the wider the potential imaging. From this very basic knowledge, a couple things can be extracted. First, any midbass location that results in identical ITD will be indistinguishable to the ear....above your head, below your head, in front of you, behind you, it doesn't matter......as long as the ITD stays the same, your ears and your brain won't know the difference. Second thing we should notice is that worst location for a midbass is at a location that results in an ITD of zero; that would be directly in front of you, direct behind you, or directly above you. Related to this, since "imaging" in the lateral plane is a function of ITD, the "best" midbass location is a location that results in maximum ITD (i.e. the wider you can get the speakers, the better). Now, a few caveats to this: First, hearing rattling/buzzing/etc as a result of the midbass speakers exciting panel resonances (door panels, etc) or other noises will ruin the illusion. Second, the speakers must be operated within the bandwidth where ITD is the mode of localization. If you operate the driver outside of this bandwidth (this includes driver distortion, etc), then other factors will begin to contribute to our localization of the sound. Proper time alignment of the midbass drivers will need to be maintained with the other drivers in the system as well as between the midbass drivers themselves. Lastly (I think lastly, I'm typing this up semi-quickly), this does not take into consideration the effects of other factors such as reflections or other anomalies. In the midbass region, the physical aiming of the driver doesn't matter. The wavelengths are very large in comparison to the diameter of the cone. What this means is that the frequency response on-axis and off-axis is going to be identical. You don't need to worry about trying to aim the drivers at the listener or anywhere in particular. There is going to be no difference in response between being directly on-axis and 60* off-axis, for example. Drivers operating within a bandwidth where the sound is non-directional (i.e. no difference between on-axis and off-axis sound) are said to be in their "piston range". So, what did we learn from this very brief primer to midbass? Yes, you can mount midbass drivers behind you....your brain doesn't know the difference. Mount the drivers as wide as possible to maximize ITD. Aiming the drivers doesn't matter.

The remedial version is this: All of those factors you mentioned can't be ignored. They all need to be considered when selecting a driver. How much and how important different factors are is going to depend on different variables. The skinny is that if you are not a discerning audiophile, chances are good we could toss out a selection of 5 drivers, you could pick your favorite based on aesthetics alone (Ooh, that one looks pretty!) and you would end up a happy camper. However, I would want to find out more about your current installation, setup and equipment before recommending you spend money and time installing midbass drivers. Where are your current speakers installed? Do you have sound deadening applied? What are your current speakers (not just brand, but model)? What are your current crossover settings for the mids and subs? What subwoofers are you using? What do you feel you system is "missing"? What headunit are you using, and does it have any equalizer adjustments?

Now look at the first box : Only one finished box in the car: He will have the same second one in it too !!! He will have to take the JBL amp on another side of the trunk !!!

Sorry for the poor quality of the pics. They come from my Blackberry camera phone ! Here is a close look of the carbon fiber adhesive we used to have a nicer look !

Don't think you can run an amp at .5ohm nominal load daily either. Any manufacturer that condones doing that is stupid. DO NOT do it. You WILL burn stuff up. Get a dual 2 and wire in parallel to 1ohm, and leave it at that...people thinking you have to wire shit way down to get more power out of it blows my mind...you do NOT do that stuff for daily. A tone burst at an SPL competition..sure..daily. NO. Those korean/chinese amps cannot handle it. They freak out.

I say go ICONS! From everything I have read, they are low end monsters. My 10" DCON is an amazing driver that has great sq, lowend and output imo. The ICONS would accomplish your goals with ease and be a great match on your SAZ-2000D.

reduces inductance and outside interference . Leave em twisted.