Stereo & Electronics - Sub advice




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Darth Z
01-12-2007, 09:34 PM
Well, I' m about to order a sub/enclosure for my car. Stereo shit is kinda greek to me. Do I want the 4 Ohm or the 2 Ohm sub? Doesn' t the 2 Ohm have the ability to accept more power? What about the sound quality? Which is better? :confused:


Element
01-12-2007, 09:55 PM
Impedance, when it comes to subs, doesn't really make any difference except allowing different wiring setups. Specific impedances and VC setups allow more flexible wiring (for example, one sub might allow you to use either a 2 ohm or 4 ohm amp, making shopping for an amp easier).

Sound quality, per impedance, is also negligible in car audio. Higher impedance drivers typically have better SQ (which is why a lot of home drivers are 8 ohm), but in a car environment - and even in a home theater setup - most people would never be anle to tell the difference.

fredmr39
01-13-2007, 04:39 PM
Consider the amp also...and the other (if any) that you plan on powering with the amp... (e.x. if you plan on powering any other speakers with a 4ch amp (2ch for the sub), then, make sure that the impedances work out to get the most for your money. As long as your amp and sub match though and you get the quality you want, good. Also realize that a lot of the subs are DVC (dual voice coils)... 4 Ohm DVC subs can be wired commonly as 2 or 8 Ohms... so make sure that this works best with your sub, and that if you get it is stable down to whatever Ohms you wish.


Darth Z
01-13-2007, 05:58 PM
This is the speaker my set-up will be using:
http://www.edesignaudio.com/edv2/product_info.php?cPath=21&products_id=34
I found a dealer that sells this sub with a box for $262. I plan to set up an amp specifically for the sub, and a seperate amp for the highs. Like I said, I know jack shit about the science of stereo systems. All I know is the stock Monsoon system is complete :turd:!! :judge:

fredmr39
01-13-2007, 06:03 PM
What did you have in mind as far as amps?

-also you said you were thinking about a separate amp for the other spks? I wasn't aware you were replacing everything, and just not the sub.

-dealer price seems a little high also....that sub ideally needs only a .5cF box - what size is the dealers? You can buy a box that size for under $30 at most places, from ED for about $50, or build your own...

Darth Z
01-13-2007, 07:03 PM
As far as amps, I' m open to suggestions. I have a 240W (for my highs) and a 400W (that I can use for my sub). I have both of those from another set-up. This is the setup I' m looking at:
http://subthump.com/images/camaro/stealth/ed102a.jpg

The box itself is $112. With the $175 ED sub, it' s $262. I have to have the stealth design, because I refuse to forfeit my topless driving experience for music, even though I love my music! :judge: Here' s the site with the stealth box: http://subthump.com/acamarostealth.htm

tannerd
01-13-2007, 07:27 PM
if you are not wanting to lose your t-top ability you can get a t-top box from subthump(same place as the stealth box) i just got my t-top box from them and it is amazing...very high quality and sounds great

Element
01-13-2007, 07:33 PM
if you are not wanting to lose your t-top ability you can get a t-top box from subthump(same place as the stealth box) i just got my t-top box from them and it is amazing...very high quality and sounds great

No real need to. eD subs aren't designed to really necessitate large enclosures.

Darth Z
01-13-2007, 07:44 PM
if you are not wanting to lose your t-top ability you can get a t-top box from subthump(same place as the stealth box) i just got my t-top box from them and it is amazing...very high quality and sounds great

That' s the one I' m refering to. Did you go with the element design sub?

fredmr39
01-13-2007, 07:47 PM
The box itself is $112.
Oh it's a stealth style box...sorry, you only said "box"...I didn't know it was custom. Price is not bad in that case.

Darth Z
01-13-2007, 08:01 PM
Oops :emb:, guess I should have mentioned that, huh?

JasonWW
01-17-2007, 08:16 AM
In response to your dual 2 ohm or 4 ohm question, what amp do you plan to use?

It it is known to deliver good power and be stable at 4 ohm mono, then you would get the dual 2 ohm sub. You wire the voice coils in series (I can explain that if you want) and the amp will see the 4 ohm load you want it to see.

If you want amp ideas, the Rockford T3002 is quite cheap and puts out serious power as it's very under rated. Like 800w if you can keep the voltage up. At like 13.4V or so it's power is closer to 400-600. Being a class A/B it will have more impact than those cheap class D amps as well. Something to think about.

BTW, this amp will makes it's most power at 2 ohm mono. So in this case you would get a dual 4 ohm sub. You would wire the voice coils in parallel to create the 2 ohm load.

So you see, it depends a lot on the amp you want to use.

2002/ws6
01-17-2007, 12:13 PM
if your pushing that one sub the best bang for your buck is what jasonww said the fosgate t3002 amp (300w 2 channel amp) good amps have one myself 500x2

JasonWW
01-17-2007, 12:26 PM
if your pushing that one sub the best bang for your buck is what jasonww said the fosgate t3002 amp (300w 2 channel amp) good amps have one myself 500x2
What model do you have?

I'm thinking of putting one T5002 on each of my 2 subs for about 900w each. I'm curious about how loud the fan is and how you like it overall.

A little off topic, sorry.

2002/ws6
01-17-2007, 12:38 PM
i got the dual p2 fosgate subs that came with fitted ported box and the 500x2 fosgate amp maybe a little underpowered for the subs, but no negative results hit hard! makes the truck rattle, not like its a good thing but whatever. the fan tho makes a little noise not something noticeble. your subs tho are those 900w peak or rms for each one?

JasonWW
01-17-2007, 12:47 PM
I was saying 900w continous from the amp.
My subs are 700w RMS and 4000w peak so they can handle anything.
Subs (http://www.jbl.com/car/products/product_detail.aspx?prod=W12GTI%20MKII&Language=ENG&Country=US&Region=USA&cat=SUB&ser=GTI)

What 500x2 amp is it? The T5002 or another one. I don't see a 500w x 2 amp.

2002/ws6
01-17-2007, 12:55 PM
oh..i got u, nice set up tho being from screwston, texas you better have some serious subs like that to bump some swishahouse! j/k

JasonWW
01-17-2007, 12:59 PM
What's swishahouse? Some kind of music, I guess.

Yeah, it will be twin sealed enclosures so I want some big power for them. Think 900 each is enough? I could go 1200w each, but the price jumps up quite a lot for that little extra power.

2002/ws6
01-17-2007, 01:01 PM
and it is a p500/2 amp fosgate nothing much but does the job!

Darth Z
01-17-2007, 02:06 PM
I don' t really know what amp I want to use. There is way too much technical shit for me to comprehend here. :( I' m not looking to compete in any sound competitions, but I do want the most out of my musical listening experience. As of right now, I just know that I want the stealth box with the Elemental Design subs, and I want to change out the stock 6" subs for the Elemental Design ones, and power everything. I really don' t know what the fuck I' m doing. :cry:

2002/ws6
01-17-2007, 02:55 PM
looking at your specs on the sub you posted i would go w/ a 1-channel amp (amp is going only to one sub) probably a 500w 1 channel amp (500/1) by all means dont believe its the exact numbers but a good place where i would look...

JasonWW
01-17-2007, 03:17 PM
I don' t really know what amp I want to use. There is way too much technical shit for me to comprehend here. :( I' m not looking to compete in any sound competitions, but I do want the most out of my musical listening experience. As of right now, I just know that I want the stealth box with the Elemental Design subs, and I want to change out the stock 6" subs for the Elemental Design ones, and power everything. I really don' t know what the fuck I' m doing. :cry:
It's not that complicated, just don't buy the sub until you have an amp to power it. Amp first, sub second.
Nothing I'm recommending is for competition use, just good old everyday listening. If it sounds good enough to compete, then that's a bonus. :)

If you need good amps for little money and don't mind a refurbished unit direct from Rockford, then check out the Rockford T5002 from High Desert Audio. They are Rockford basically and have these for $220 each. They can do about 1000w each at 14.4 volts. So they're beefy. They also have fan cooling built in while the slightly smaller T3002 does not. You could get 2 of them and be set. One for the front mid/tweets and one for the sub. In this case you'd need the dual 4 ohm sub.

This would give you 220w x 2 for the front speakers and 1000w to the sub. The T3002's are like $179 refurbed and would provide about the same to the front and 800w to the sub. Don't let these big numbers scare you. If your alternator is only giving you 13v to the amps then the amps power drops some just like most all amps do. It's still going to be plenty. You won't need to upgrade these amps anytime soon.

Below are the actual power numbers and the percentage the amps are underrated.

http://img.photobucket.com/albums/v335/JasonWW/Misc%206/amp_watts_power.jpg

Darth Z
01-18-2007, 09:04 PM
Thanks for all the help. I have the money for the sub now, but I' ll save it for now, until I can get the amp too. I' ll be back after I get the amp, asking for more info. ;)