help me understand some things

[accuab 10+ year member]

Okay so I'm completely new to building a custom ported box for a sub. I always knew it was better just never got into it. I was looking at getting a kicker cvr 12 to put in my car. I have read several posts about there being better non mainstream subs so any suggestions are great. I'm gonna run a mtx amp putting out 300 rms at 2 ohms. I was looking at the sub cause I could get the older model still brand new for like $85 total. If someone knows a sub that meets my requirements that is on that level of money, that would be great. I'm not stuck on main brands. It's just what I was always taught. I know there are better other brands. I just don't know enough about them to get one. So I've been looking at the RE box calculator suggested on here as well as winisd and have came up with a ported design. Here's my hangup: how does the subwoofer I get change the way a box is designed? I haven't seen many posts about what to use on the sub's ts parameters to determine things about the box. I understand the tuning of the port but not how it relates to the sub itself. I was trying to do a relatively small box ~ 2.25 ft^3. I read to use 12-16 in^3 of port size per cube in order to keep the port velocity down to control port noise so I got the main ideas. Can someone explain how designing a box around a certain sub is done? Or does it even matter?

The cvr is am looking at has a Fs of 26.1 Hz which I know is a low frequency. Am I correct that I can tune the box to any frequency I want as long as it is above that? I was looking at doing around 33 Hz on the box for a good middleground of deep bass and spl.

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[murph 10+ year member]

here is a link it is an incriminator 187 187-12 D4

this sub will be better than the cvr and fits you power req

 

[JoshC 10+ year member]

SSA DCON!!!! its 300rms, that incriminator above me is good too

Sub Woofers - SoundSolutionsAudio - DCON - SSA STORE

You could run a sealed box on the DCON and it would sound good, much easyer then a ported box

 

[accuab 10+ year member]

Both of those look good and I appreciate the help. Is there a good 12 to run at 2 ohms at a lower price? Like is there an older model of those subs or something. The main reason I was looking at the kicker was the price. The new model of it is $150 which I really wouldn't want to put into a sub. I'm not trying to destroy something with bass. I have a regal with the factory monsoon radio. I know it's not the best by any means but I'm satisfied mostly. I was just wanting to add some more bass to the background but have something that could actually hit if I wanted it to.

 

[keep_hope_alive Premium Member]

PM me your email and I will provide the detailed description of how to design a sub box.

When designing the box, you determine the overall Q.

Your budget is low for a decent sub. But if you want just one sub, it should be 4 ohm DVC. Maybe check the classifieds.

 

[murph 10+ year member]

This old hx2 rockford is for sale on this forum here http://www.caraudio.com/forums/subwoofer-classifieds/525502-fosgate-12-hx2.html

it will slam pretty nice on 300rms but 500 would be better for it and you may be able to negotiate the price with him a little.

 

[TheUnderFighter 10+ year member]

Either the DCON or 187 could both be ran at 2ohms, as they both offer a Dual 4ohm voice coil. Also, I'd recommend an Obsidian Audio 12. Obsidian Car Audio

Which is capable of a fine mixture of sq and low-end extension, might be very ideal.