New Guy to the Forum Needs Help

[KJLiberty 10+ year member]

Hello Everyone,

Im new to the forum and am in need of some insight on upgrading my current system.

1. I want to do 2 12" Alpine Type R's in a ported box. Whats a good box for these as im not very handy and dont own any tools?

2. I plan on getting the Dual 4 ohm Voice Coil ones and running them at 1 ohm, whats a good amp that will allow me to harness their true and full power?

3. My experience and knowledge in car audio is pretty basic just as a heads up.

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[DoesDad 10+ year member]

What kind of room you got? You'll need at least 4-5+ cubes to run the R's. Are you getting the newer models 1000 rms or the older models 600 rms? It also helps to know what kind of car you drive, what music you listen to, and what you're looking to get out of the subs? Also if you've got the newer ones 2000 rms is pretty taxing on your electrical...

 

[Jaguar 10+ year member]

Hello Everyone,
Im new to the forum and am in need of some insight on upgrading my current system.

1. I want to do 2 12" Alpine Type R's in a ported box. Whats a good box for these as im not very handy and don't own any tools?

1. Take a look at this. Alpine Type R 12" Dual Ported It's made out of Mdf, also it states the port is tuned to 33hz which is perfect. Port tuning usually ranges from 25-45 the lower end having more emphasis on SQ starting at the 25hz range and SPL on the other side of the spectrum. Right in the middle is what you want so you have the best of both. I consider mid-range (30-35hz) SQL in general. Make sure you measure the dimension(s) of your trunk space so you know this enclosure will fit. If possible you want to get a box you can push back into the depth of the trunk and have room left, but this also allows the sound-waves of the bass to expand (properly). This as opposed to having a box that's could barely fit where the speakers are a few inches away from the trunks lock. I have mine set back around 22 inches.

2. What's your budget? Go for a proper mono-block 1 ohm stabilized class d amp. How Mono Block Amps Work | eHow.com From what I hear there are quite a few amps that claim to be 1 ohm stable but aren't true channel separation mono amps. In the specifications for whatever amp you choose look specifically for Mono channel operation or 1 ohm stability. Just because the amps states in the rms power ratings that it has 1x at 1000 watts at 1 ohm doesn't mean it's a true mono-block amplifier. and even though it says it's mono-block in the description doesn't mean it is either, it means you can wire it to 1 ohm. I think you would be good with this, it's what I'm getting in a few weeks. MB Quart ONX1.2000D - ONYX Class D Monoblock Car Amplifier/Amp. Alpine Type R's are 600watts, so it would be good to get an amp that can push between 1500-2000watts.

 

[KJLiberty 10+ year member]

What kind of room you got? You'll need at least 4-5+ cubes to run the R's. Are you getting the newer models 1000 rms or the older models 600 rms? It also helps to know what kind of car you drive, what music you listen to, and what you're looking to get out of the subs? Also if you've got the newer ones 2000 rms is pretty taxing on your electrical...

classic met

i can fit 45" width and about 30" depth. Im getting the 600rms ones. Its an 04 Jeep Liberty, i listen to hip hop and classic metal and 90s alt/grunge. i basically want to be heard and to have an experience every time i listen to my music.

 

[mylows10 5,000+ posts]

**** too far ,i have a box already built for the subs ,but shipping will be $100 alone

 

[KJLiberty 10+ year member]

CRAP! ahahah.

 

[quackhead 10+ year member]

A good rule of thump is to plan on spending at least as much on an amplifier as you do your subwoofers. Lack of efficiency can cost you a ton of money in electrical upgrades as well. Just remember, Most amps are rated at their most efficient and cleanest impedance : Usually 4ohms. As the ohm load drops, the amp works harder and consumes more from your electrical per watt vs the same wattage from an amp capable of producing that wattage at a higher impedance. This is also true for the harmonic distortion introduced by the amplifier at a lower impedance. To power the R's at their rated 600 watts each, you should look for a true 1000 - 1200 watts rms minimum at the highest and cleanest impedance you can afford. If you choose Maxxsonics as your power online, look to the new 2012 Gladiator line:

Hifonics GLX2200.1D Single Channel Amplifier - Sonic Electronix

or this:

Crescendo Audio BC2000D - 2250 watts x 1 Mono Block Bass Clef Series Amplifier - SSA STORE

or this:

SSA Store - Sundown Audio SAZ-2500D Amplifier

or this:

DC Audio - 2.0k

any of these amps will power two 2ohm DVC R's to their full potential at a much cleaner and more efficient 2ohms.

just my .02

 

[KJLiberty 10+ year member]

I like what youre saying but im not quite ready to throw the loads of money down to get something like the sundown amp or the dc labs amp because both recommended an upgraded battery and even the option of a second one! i just want my system to be loud and clear. Im not trying to win any SPL competitions or anything........yet.

but thank you very much. that helped a lot.

 

[quackhead 10+ year member]

I like what youre saying but im not quite ready to throw the loads of money down to get something like the sundown amp or the dc labs amp because both recommended an upgraded battery and even the option of a second one! i just want my system to be loud and clear. Im not trying to win any SPL competitions or anything........yet.
but thank you very much. that helped a lot.

man, I was just giving you examples of what is out there. There was another thread here today by someone who bought a HiFonics 1200 watt BRZ and set it up to run 4ohms at 450 watts. They could not understand why it didn't sound any louder than the Rockford Fosgate 500.1Bd 500 watt amp that made 200 watts@ 4 ohms they replaced.

I am just trying to tell you that you get what you pay for and it could cost you alot more in the long run. If you are on a tight budget and are serious about a true 1200 watts+, just to match those subs...think about this:

lets say a $300 amp rated at 1200 watts @1ohm with a 90% efficiency rating at 4 ohms, @14.4v. To get the power at 1ohm, you can realistically expect a reduction in efficiency down into the 70% margin, say 70%.

1200/.70= 1714 watts in...that is 514 watts sent to the heat sink to make the 1200 watts.

1714/14.4 = 119 amps required

Look at a amp that produces the same 1200 watts at that 90% efficiency at 4 ohms @14.4v:

1200/.90= 1333 watts in...that is 133 watts sent to the heat sink to make the 1200 watts.

1333/14.4= 93 amps required

That is a 26 amp difference in current required at 1ohm vs. 4ohms to produce the same 1200 watts. I am not saying all amps are created equal, but do remember, you get what you pay for...I almost forgot to mention adding in the expected jump from 1% thd+ @4ohms to 10% thd+ at 1ohm in some cases of cheaper designs.

Even at 93 amps system requirement, you are advised to perform the big 3 electrical wiring upgrade and possibly an upgraded battery up front.

As I said, a person looking to build a system from the ground up should

A) Determine the sound quality they wish to achieve.

B) Decide what power they want that will fit the mounting space they have and provide the most efficient and quality sound.

C) Determine electrical upgrades that will be required to continuously provide the power chosen

D) Choose subs that can handle the chosen amplifier power output and meet the space and sound quality requirements.

 

[05fronty 5,000+ posts]

5 cube tuned to 35hz, find a used aq 2200 and be done

 

[SplAffair 10+ year member]

5 cube tuned to 35hz, find a used aq 2200 and be done

this

 

[KJLiberty 10+ year member]

sorry i didnt mean to come off angrily, my mistake. just one last quick question. i cant understand why if i get one amp that does 1000wrms at 1 ohm and another that does the same but at 2 ohm that it is different on my system. is it that the one that can do it at 2 ohms is more efficient and will make them sound better?

p.s. i have decided to just do dual 12" alpine type s's in a custom box powered by either the MB Quart ONX1.1500D or the MB Quart ONX1.1000D

 

[05fronty 5,000+ posts]

sorry i didnt mean to come off angrily, my mistake. just one last quick question. i cant understand why if i get one amp that does 1000wrms at 1 ohm and another that does the same but at 2 ohm that it is different on my system. is it that the one that can do it at 2 ohms is more efficient and will make them sound better?
p.s. i have decided to just do dual 12" alpine type s's in a custom box powered by either the MB Quart ONX1.1500D or the MB Quart ONX1.1000D

well at least get the 1500

 

[DoesDad 10+ year member]

well at least get the 1500

Fronty be right homey... Those Alpines are underrated. Instead of under powering by 100 overpower by 250 (which you'll never see anyway after rise and all that good stuff) anyway. I had an older AAAARRRRR 12 and I tortured it for a year giving it 1000 rms and it took it like a champ. Sold it on Craigslist finally. Got sick of looking at it...

 

[05fronty 5,000+ posts]

just get the dual 4's also. what is your budget for a amp op? like a 40 dollar diff between the 1k and the 1.5 k