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cobra93

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Posts posted by cobra93

  1. Posted

    Since you're undecided on what type of drivers you will end up with and full range is on the list of choices, I'd think it'd be in you're best interest to buy a pair of full range driver to try out.

    Some would be around $50.00 for the pair and would be the cheapest way to know for sure if their a viable option or not.

    This would definitely help to narrow you're choices.

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  2. Posted

    Hey Ford, I've red through this and want to point out for future reference regarding head units.

    I can't find the info at the moment, but when I looked into getting a pioneer800/800, I found the front rca outs (high pass) will only go as low as 1,250 hz. @6 db slope.

    This could be an issue if you choose to go active and the full range route. You'd still have to use the amps x-over as your high pass.

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  5. Posted · Edited by cobra93

    The thing that really gets me, and most of you as well I'm sure, is KEVIN still doesn't get it after 17 pages of potential customers telling him how to rectify this shitty situation.

    If I may quote the movie Armageddon > " I wouldn't trust him with a potato gun."

    Kevin, you are a waste of space. Your true colors have shown once again. Your window of opportunity to make this right and establish a good reputation has expired! :banhim::Doh::fryingpan::jon:

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  7. Posted

    There are 2 major factors that I think will kind of help explain what you are asking(?)...

    Normally, in a vented 4th order alignment (which is most of what we discuss on here) you are going to have 3 impedance peaks. The first 2, which will be domiant for most of our applications, are the peaks below and above the dip (trough) at tuning. The 3rd peak, and not quite as signifigant (or completely ignorable if you are totally out of the bandwidth) is the gradual peak that is caused by the inherent inductance of the voice coil.

    So, an easy way to describe the first 2 peaks.... At resonance, the cone of the subwoofer is highly damped by the entire system attributes (mainly the Hemolitz resonation taking the load from the cone in an efficent manner) and due to the high amount of dampening (control) the reactive electrical properties are at a low point (null) and load is moved into a more resistive (reactance properties start cancelling each other out) realm... Above and below this point dampening suffers quickly and is immediately apparent due to the high amount of impedance shift... I am not sure if this is broke down well for understanding... I haven't really had to explain this many times and there are alot of people out there who could convey this better than I...

    The 3rd peak is easy. The voice coil is an inductor, inductive reactance is proprtional to frequency. And a little food for thought, some overhung designs have 4-5mH of inductance, this starts raising impedance signifigantly as low as 100 Hz or so....

    This is why I always say there is no such thing as "Impedance Rise".... You can see, the impedance goes up and down alot...

    Thanks for posting this!!

    Let's dumb this down a little to see if I'm understanding you correctly.

    A simple vented enclosure for example.

    If I understand what you're stating above.

    As the air in the port resonates it places a load, resistance to movement or a "brake", on the cone and this causes the impedance to increase in value.

    I'd venture to guess that if the if the above, my assumption, is correct.

    The cone/coil can't cycle "freely" and, for lack of a better term, is causing "feedback" or a higher resistance to movement due to another force fighting the AC voltage being sent to the coil to induce movement.

    Is this basically correct or completely wrong?

    Not sure I follow your analogy, so let me try to make this easier to understand.

    Ported enclosures have three impedance peaks.

    -The first two are enclosure dependent

    -1st peak (lowest F) is directly related to the chosen port

    -2nd peak from resonance

    -3rd peak from the inductance of the driver – this one you can ignore

    The confusion you have is around the 1st peak. Your analogy of a load/resistance is not terribly far off. To simplify this, basically we can change this peak in a couple different ways. First we can change the port size. If the port cannot support enough air at the velocity that the driver is trying to push through it, the impedance will change somewhat proportionally. The reason I use somewhat is that it is not a linear behavior. The other way to change the peak besides port size is to change the power. Obviously if the “too small” port above didn’t work at X power if we lowered the power to some level below X it could come into a range where it was okay and the air could move through the port. A third non-controllable impedance changing device is the temperature of the voice coil. This will obviously affect more than just the impedance, but nonetheless the drivers impedance will change with coil temperature.

    Thanks for answering M5. I guess I'll have to do some reading on this subject to better wrap my brain around the "why".

    Perhaps I was trying to make this to simple. Leaving temperature and inductance off the table.

    My thought was a medium, air in this case, was causing resistance to cone motion and in turn the impedance increases.

    Time to do some homework.

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  8. Posted

    There are 2 major factors that I think will kind of help explain what you are asking(?)...

    Normally, in a vented 4th order alignment (which is most of what we discuss on here) you are going to have 3 impedance peaks. The first 2, which will be domiant for most of our applications, are the peaks below and above the dip (trough) at tuning. The 3rd peak, and not quite as signifigant (or completely ignorable if you are totally out of the bandwidth) is the gradual peak that is caused by the inherent inductance of the voice coil.

    So, an easy way to describe the first 2 peaks.... At resonance, the cone of the subwoofer is highly damped by the entire system attributes (mainly the Hemolitz resonation taking the load from the cone in an efficent manner) and due to the high amount of dampening (control) the reactive electrical properties are at a low point (null) and load is moved into a more resistive (reactance properties start cancelling each other out) realm... Above and below this point dampening suffers quickly and is immediately apparent due to the high amount of impedance shift... I am not sure if this is broke down well for understanding... I haven't really had to explain this many times and there are alot of people out there who could convey this better than I...

    The 3rd peak is easy. The voice coil is an inductor, inductive reactance is proprtional to frequency. And a little food for thought, some overhung designs have 4-5mH of inductance, this starts raising impedance signifigantly as low as 100 Hz or so....

    This is why I always say there is no such thing as "Impedance Rise".... You can see, the impedance goes up and down alot...

    Thanks for posting this!!

    Let's dumb this down a little to see if I'm understanding you correctly.

    A simple vented enclosure for example.

    If I understand what you're stating above.

    As the air in the port resonates it places a load, resistance to movement or a "brake", on the cone and this causes the impedance to increase in value.

    I'd venture to guess that if the if the above, my assumption, is correct.

    The cone/coil can't cycle "freely" and, for lack of a better term, is causing "feedback" or a higher resistance to movement due to another force fighting the AC voltage being sent to the coil to induce movement.

    Is this basically correct or completely wrong?

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  9. Posted

    A good seller would have already refunded the money and dealt with claims themselves. But that's not the case here. UPS should only take 2 weeks to make a decision. A store manager told me this.

    It really shows a persons merit, doesn't it.

    Kevin must not realize the power of the search function.

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  10. Posted

    You would know better then I if Jackson, Mich is a "hick town".

    Regardless, I'm just south of the Mi. border in Ohio and you have one of the nicest golf courses I've ever played, Grande golf course.

    So you live near Toledo? I grew up in Toledo for a little while when I was a kid. And yea...the Grande is one of the best golf courses to play at. Also, the one up at Boyne near Traverse City. (The Red Wings play there during the summer to practice sometimes)

    Yep, I'm in Toledo. Jackson is about a 2 hour drive for me. Traverse city would probably require a stop, or two, for gas.

    M5 knows his s**t up, down and sideways. He helped me with my build and I appreciate it every time I listen to it.

    Don't think that better equipment always means more expensive. I've fallen into that trap before.

    Are you looking for a an SQ setup, or just a good sounding sub system? The thread title may be misleading.

    I've got a 2000 extended cab ranger, the build is in my sig, I'm using 2 eclipse ti's sealed for now.

    I'm still working on which direction to point my subs for the best blend with my front stage.

    The interior of your truck is way different than what mine looks like. lol. I guess Ford changed the look in 2 years. Anyway...that's an awesome build that you did. I never thought of using metal for kerfed ports. How did that sound?

    If you like a 12db or so gain around port resonance, it would be right up your alley.

    It had the dash jumping up and down and door flex like crazy with anything between 30-40 hz, but dropped off sharp above/below that range.

    The box was too big and I removed it after about a week. This is the way BBP predicted the box would sound, I didn't believe it would peak that bad. Oh well, I now know i don't want more than a 3 db gain at port tuning, they sound like sh*t to me for music.

    The kerf port would blow my hat off my head when the volume was up.

    As far as the port using steel, it was simply an easy way to do it, for me.

    I don't know if you looked at my front stage build log or not, but I have less than $300.00 in the drivers, all six of them, and they sound/image damn good.

    Bass is bass, the rest of the spectrum of music is more important to me.

    If you're truly happy with what you have up front, I envy you.

    I don't use rear speakers, haven't for allot of years.

    A sales person at a local stereo shop, that I became friends with, asked me if I went to concerts and stood with my back facing the stage.

    I said no, and have been working on achieving the best front stage I am able to. No more rears after that, it took awhile to get used to.

    If I were you I'd restate what you'd like to achieve in your truck, specific shortcomings.

    With more information people on here will have a better idea on what to recommend to you.

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  11. Posted

    You would know better then I if Jackson, Mich is a "hick town".

    Regardless, I'm just south of the Mi. border in Ohio and you have one of the nicest golf courses I've ever played, Grande golf course.

    So you live near Toledo? I grew up in Toledo for a little while when I was a kid. And yea...the Grande is one of the best golf courses to play at. Also, the one up at Boyne near Traverse City. (The Red Wings play there during the summer to practice sometimes)

    Yep, I'm in Toledo. Jackson is about a 2 hour drive for me. Traverse city would probably require a stop, or two, for gas.

    M5 knows his s**t up, down and sideways. He helped me with my build and I appreciate it every time I listen to it.

    Don't think that better equipment always means more expensive. I've fallen into that trap before.

    Are you looking for a an SQ setup, or just a good sounding sub system? The thread title may be misleading.

    I've got a 2000 extended cab ranger, the build is in my sig, I'm using 2 eclipse ti's sealed for now.

    I'm still working on which direction to point my subs for the best blend with my front stage.

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  13. Posted

    That was awesome! Keep them coming. :drink40:

    Do you need a special type of wood when designing a box that changes shape when playing a 15" sub in it? :suicide-santa:

    There's no way I would've been able to keep my mouth shut for very long. You're tongue must have been bleeding by the time you left for home.

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  15. Posted

    I watched the video you linked, it doesn't show much.

    I also looked at their website, I don't see anywhere to enter any additional info beside the what you've shown in the pics.

    There is a tutorial in winisd that gives you the order the info should be entered for a new driver. Try playing with winisd again and see if you can make sense of it.

    While the response of the system will change once you place it in a car, it will give you an idea of what you like/dislike. You will hopefully have an idea of what to try next, too much/little low end or to peaky and go from there.

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  19. Posted · Edited by cobra93

    SomeDonnieDude, I understand that you're not happy with the course of events that have taken place, but if I were in your shoes I'd be happy that I was out of this deal. Live and learn.

    Knock, I hope Kevin starts looking to his future as a businessman, reputation caries allot of weight and word of mouth is a very powerful thing, and refunds your money.

    Kevin, It has been shown that the events surrounding these amps is not on the level. Refund Knocks money, stop the ups claim and eat the loss.

    You need to prove your character right now. You need to make things right for Donnie and knock.

    What you do and how you proceed will either make or break you as a person people will or won't want to do business with. Reputation is everything.

    I, as well as others I'm sure, would like this resolved out in the open.

    Asking to sort this out in private, after the events that have taken place, makes it look like you have something to hide. Whether you do or not.

    I would make this right as quickly as possible if I were in your position.

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  23. Posted

    I'm looking to upgrade my amps in the spring, new vehicle.

    I think a Leviathan/Dreadnought combo could fit the bill nicely.

    Dreadnought on some upfront mid bass/subs should be pure awesomeness!

    My question is.

    On SSA store the Leviathan is stated to have defeat-able crossovers on all channels.

    When reading the news on Zeds site, Steve doesn't state this as a feature on the new models.

    I'd assume a flat setting will exist on the new amps, but does anyone know for sure?

    :wavey5:

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  25. Posted · Edited by cobra93

    I'm looking to upgrade my amps in the spring, new vehicle.

    I think a Leviathan/Dreadnought combo could fit the bill nicely.

    Dreadnought on some upfront mid bass/subs should be pure awesomeness!

    My question is.

    On SSA store the Leviathan is stated to have defeat-able crossovers on all channels.

    When reading the news on Zeds site, Steve doesn't state this as a feature on the new models.

    I'd assume a flat setting will exist on the new amps, but does anyone know for sure?

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