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Old 11-01-2004, 10:45 AM   #1
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Default Setting up system: Tips needed

Okay so heres the deal. I need a sub box, am probably going to design my own and i need an amp. I got the rest and heres what i got.

Front Doors : Infinity Reference 505CS :75W RMS 225W MAX
Rear Deck : Infinity Reference 6952i : 100W RMS 300W MAX
Subs : 2 x Infinity Kappa Perfect 10.1: 350W RMS 1400W MAX
H/U : Alpine 50Wx4, older version but has built in hi/lo Xovers

(Links to each parts at bottom of post)

I'm wondering what type and size of box to use for very good hard hidding (be able to feel it outside) but firm (inside) bass, and what amp to use. I was looking at a HiFonics Brutus 1500 D, its 1000W rms @2 ohms, which i'll be running at with two 4ohm subs.



I'm also wondering about power drain issues. Will i need a bigger/better battery? Alternator? Cap maybe?

5 1/4'* : http://manuals.harman.com/INF/CAR/Ow...505cs%20om.pdf
6x9'* : http://manuals.harman.com/INF/CAR/Ow...6952i%20om.pdf
Subs : http://www.infinitysystems.com/caraudio/product.aspx?ProdId='KAPPA+PERFECT10.1'&Ser=KAP&Ca t=SUB
AMP : http://www.maxxsonics.com/hifonics/a...rutusSpecs.htm

~Matt
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Old 11-01-2004, 05:08 PM   #2
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ok heres the scoop on the box. i would go with a sealed box because it will hit cleaner and your trunk is sealed so sealed is your best bet. i would go by the specs in the manual for box dimensions, these subs need air space so you do not want to go with a truck box or a small box of that type, but if you go too big it will not hit as accurately so try to get as close to the dimensions as possible. as for the alt you may want to look into getting a new one if it is an original alt because sometimes they have problems when you add systems. if its in your budget you can just upgrade to a higher amp alt. you will want a cap to stop your lights from dimming and things like that but it will not take the strain off your alt if it is having problems keeping up. if the battery is old and has a short life than you should replace it. good luck on your installation.
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Old 11-01-2004, 06:35 PM   #3
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I would stronly reccommend using 3-way speakers if you want extreme definition and contrast between voice and instruments, which you might since you have subs, and they'll handle all the bass. In this case, I'd recommend upgrading to the Infinity 6953i.

I'd also consider finding a 3-way 5.25" speaker. To be brutally honest, I've found 3-way coaxials to sound better than 2-way components in most installations. Coaxials are cheaper, and easier to install. Just because something costs more doesn't always mean it'* gonna sound better.

If you're going to use infinity, then you've already got some good products in mind. If I could convince you to go brand hopping, you might try to find some speakers with 93db sensitivites, as they will give you more sound at the same wattage, reducing power consumption as much as an amp, and reducing the work load of the reciever!
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Old 11-01-2004, 08:55 PM   #4
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I dont' cnosider 3 ways superior to 2 ways if both have the same effort put into it, a 3 way will actually sound worse because it has another crossover in the audio spectrum.
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Old 11-02-2004, 12:35 AM   #5
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I'm not trying to start an argument here, just explain how I've personally come to my conclusion. A larger speaker can't reproduce highs as well. A very small speaker can't reproduce mids or lows as well. Large speakers have problems with mids that are let'* say over 2-5khz. 8" subs hit hard, and 15"ers devliver low bass. Anyhow, the more different sized speakers you have in your arrangement, the more accurate sound will be produced at each level.

That said, sure, another crossover takes a piece of the pie, the total wattage allowed for the system. But it'* a very small value. If you believe the crossovers may be inneficient, look at the sensitivity value (in dB) of a speaker. Given a certain wattage, the sensitivity is the amount of sound that particular speaker makes.

Crossovers are usually pretty efficient...go to crutchfield.com and look up 6x9'*, then select speakers with a 91db or higher sensitvity. You'll find they have several 2ways, 3s, 4s, and even a 5-way. That means these speakers, irreguardless of the number of inductors and capacitors used for crossing over, output the same amount of sound at the same wattage.

The best way to tell if you want a 2, 3, 4, or 5 way speaker is to go to best buy or whatever, put on the tunes you normally listen to, and try the different speakers. Anything over 3-way sounds very similar, but you can usually tell the difference between a 2-and 3-way. Check it out, decide what you like better. I've found 3-ways to have the best sound for the money.
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Old 11-03-2004, 08:51 PM   #6
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How "hard" something hits has to do with its excursion, not neccessarily its size. A smaller speaker will seem to be quicker and have tighter and what is sometimes considered "harder" bass. when you put any component in the equation, aside from the speaker, it will induce some noise, yes, but most of the time, as long as u dont overdo it, you should be alright. If you can distribute different freaquency ranges across more speakers, in many instances, its better.
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Old 11-04-2004, 12:18 AM   #7
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jachin you're absolutly right. Excursion has to do with how hard a speaker hits. Sometimes I'm not thinking when I'm typing, lol.

Instead, I obviously meant a 15"er will deliver deeper bass than an 8", and that'* it.

Thanks for catching that!
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