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Unread 12-16-2009, 12:36 AM   #1
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Default New to car audio, whats good for a <$300 system + how dfo I make my own sub box.

Alright I'm about to get my hands on my first car. (Nissan 240sx SE ) I want to have a *****in' sound system so I can speed up the rate at which I can become completely deaf. :P

My first question is what would I need to buy to replace my speakers + radio and drop in a couple of 10" subs in the trunk. So long as it sounds alright, and the components don't fry when I turn them up I'll be fine. I'm in no way an audiophile.

My second question is that how would I build my own speaker cabinet for 2x 10" subs, and can I use standard non-car subs in a trunk setup. Here is the speaker that is in the home set that I have:

http://www.speakerrepair.com/mm5/mer...de=ACC_CV-Vega

Edit: I also have a third question. I'm not gonna go too crazy into this system, I just want it to sound good, and be pretty loud. So what wattage of an amp do I need, and what kind of wiring would I need (gauge, insulation, etc.)

So basically, I need to know what brands are good/crap and guides on how to make a sub box and how to wire this stuff.

Last edited by sP00N; 12-16-2009 at 12:50 AM.

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Unread 12-16-2009, 12:04 PM   #2
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Well for one, there is a big difference between sounding good and being loud. Where do I start with this one... Let's start at sound dampening. Dynamat... Look it up. You will want to Dynamat your entire car, trunk included if you plan on using subs. I have to tell ya though. For a great sounding system you don't need 10" subs.. You need 2 8" subs. Just go high quality like JL/HK/Alpine/Kicker. Replace all your car speaker with a speaker of the same size just higher quality and pump some power to them with an amp. I used to be into the whole loud system thing until I heard a BMW 3 series Harman/Kardon system. Immaculate... Not a lot of bass but enough and it doesn't drown out the music, even for rap it's enough bass.

For a good system you will need to replace all the original speakers, if there is a slot somewhere for some 8" subs or perhaps some 6x9's replace them and don't get 10" trunk subs. See how the system sounds without it. You will wanna dynamat the car, you are also gonna need a good head unit and of course, an amp to power everything.

My mustang has the shaker 500 system in it which includes (I think) 2 8" subs, 2 6x8's and a few other speakers. I haven't replaced anything because it's a great system and is well balanced, not too much bass but enough so that you can still "feel" the bass. Eventually when I get some spare cash I am upgrading, but not to anything bigger, just higher quality with a little more power behind it.
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Unread 12-17-2009, 03:26 PM   #3
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Alright, i think once I get my car I'll measure the speaker holes and then start buying stuff. Also what sites are good to buy stuff from and are local shops worth looking into as well? I know there's a car audio shop a few miles away from me.

I might just settle for a single 10" sub. One of my subs has a Dual voice coil, so here's my next question:

Should I buy a 4 channel amp and connect the DVC sub to both the rears, or should I buy a 5 channel and connect the SVC sub to the 5th channel? Really I don't care if it's ridiculously loud, and I've come to realize that decent 5 channel subs cost my entire budget. >.<

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Unread 02-24-2010, 09:17 PM   #4
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Quote:
Originally Posted by Shrimpykins View Post
Well for one, there is a big difference between sounding good and being loud. Where do I start with this one... Let's start at sound dampening. Dynamat... Look it up. You will want to Dynamat your entire car, trunk included if you plan on using subs. I have to tell ya though. For a great sounding system you don't need 10" subs.. You need 2 8" subs. Just go high quality like JL/HK/Alpine/Kicker. Replace all your car speaker with a speaker of the same size just higher quality and pump some power to them with an amp. I used to be into the whole loud system thing until I heard a BMW 3 series Harman/Kardon system. Immaculate... Not a lot of bass but enough and it doesn't drown out the music, even for rap it's enough bass.

For a good system you will need to replace all the original speakers, if there is a slot somewhere for some 8" subs or perhaps some 6x9's replace them and don't get 10" trunk subs. See how the system sounds without it. You will wanna dynamat the car, you are also gonna need a good head unit and of course, an amp to power everything.

My mustang has the shaker 500 system in it which includes (I think) 2 8" subs, 2 6x8's and a few other speakers. I haven't replaced anything because it's a great system and is well balanced, not too much bass but enough so that you can still "feel" the bass. Eventually when I get some spare cash I am upgrading, but not to anything bigger, just higher quality with a little more power behind it.
... Your giving all this advice and you're not even sure what you have in your car...?

@OP, number 1 thing to do, it just go down to any place that stocks car audio, whether a local store, or a place like Bestbuy and listen to the audio. Everyone has different musical tastes and will have different preferences.

Some people like pure SPL, bass rattling everything and don't really care about the actual quality. They go for higher powered subs. I personally like a more musical setup and don't overly care for bass aside to round out the lows.

Anyways:

For 300$ your probably not going to be doing all that unless you pick up some of it used.

First find a decent head unit, one with 3 preouts would be ideal if you decide to amplifier your speakers down the road. I personally prefer Alpine. Pioneer usually isn't bad, not a fan of JVC. Try to stay away from anything Sony produces.

You don't need dynamat, not with just wanting do upgrade your stock system. Dynamat (though I like other brands) does make a nice difference, especially just driving even without music, it cuts down on road noise significantly, but the differences isn't worth the cost with such a small budget.

For a sub enclosure. You can buy premade ones if you really want, or if you have access to power tools, or know someone that can help, use MDF (Medium Density Fiberboard). Its very dense which is much nicer for enclosures, please stay away from plywood. You can carpet it if you'd like, but its for looks.

For amp/subs. Make sure you get the right impedances, remember wiring subs in a parallel, positives together and negatives together, halves the impedance. Series doubles it.

Example:
Two 10" 4ohm subs rated for 300W RMS.

Wiring them in parallel gives 2 ohm impedance and they will share the power. This means you'd be wanting to find an amp in the 500-600W RMS @ 2 ohm range, or a 2 channel amp thats 200-300W RMS x2 @ 4ohms.

If your looking to amplifier your speakers and subs, I would recommend getting two separate amps, I haven't come across many 5 channel amps I truly like. By using two, then down the road if you wanna upgrade 1 or the other its easier. Say you get a thirst and feel the need for more bass, you can always swap out the sub and upgrade that amp and done.

For reference in case your curious:
My previous setup in my car (unfortunately got written off in January due to idiotic driver not knowing what a red light means)

Single DIN Alpine Deck, don't remember the model number off hand.
2 Alpine Type R 6.25" components in the doors /w tweeters mounted up near the roof.
2 Alpine Type R 6x9's in the rear
1 Rockford Fosgate P300-1, Spec sheet shows 402W RMS @ 2ohm
1 Rockford 10" P3 wired to 2 ohms
Ported enclosure tuned to 31Hz

Last edited by pheoxs; 02-24-2010 at 09:22 PM.

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