this setup, whos is it? Options

[Dragondog]

ok here are some answers from pesonel experince i did the same thing i bolted amp and cap to back of seats and folded them down and had 2 12s facing through with a light and blew one out too had to replace, it looks really really cool but the sound is false you do not get that deep tone. it really sounds like a reg speker just with treb. and mid. turned all the way down but when its facing the back the deep tone bounces around creating a true bass sound and what makes it better is the closed trunk with closed back seats.........and more on i have an over sized box for my 2 12s fosgate, speakers are made to have no blow holes so my box is all closed witch cuz of that i get a good deep echo within my box as well as deep tone bouncing around in the trunk, i made a smaller box for the 12s, for trunk space, and it was also inclosed in a plexy glass box and it sound like crap i took off the plexy and it sounded better but i was not feeling it, the box did not echo like the bigger one did so i switch back....smaller trunk space is a price i pay for better sound................i would like to remodel the whole trunk but if i do i would lose my spare tire and to this day without it i would be lost

This post has been edited by Dragondog: Jul 22, 2007 - 10:08 PM

[soven]

What material was your sub box made out of?

A good subwoofer box should not vibrate at all or vibrate very little. 18mm MDF would be the recommended minimum to use for a subwoofer box. 25mm would be even better but that is bloody heavy. Your subbox should not vibrate and cause unwanted echoes etc etc. Its purpose is simple:

1. Air tight(if sealed box) and not colour the sound in anyway.
2. Correct volume to give the correct amount of damping to the subwoofer cone.
3. Baffle must be adequate to prevent backwave cancellation.

What is backwave cancellation? I am sure you all know physics and know about dropping a stone into a pond and you will see the ripple effects. What happens when they meet? They either sum together or they cancel each other. How does a speaker/subwoofer work? same thing. It vibrates and thus creating sound waves that is similar to the effect you see in the water. Most people forget that, if you turn a speaker around.... you will still hear sound. soundwaves emit from the speaker from the front of the cone and from the back as well. Now, if you did not slow down the back wave enough... it is going to interfere with the front wave in the listening space.
*This is one of the reasons people use dynamat on their inner door trim. It is to slow down the backwave enough that it would not interfere with the front wave of the speaker.

The reason why your subwoofer sounds louder when it in the trunk?
see here: http://www.teamrocs.com/technical/pages/aiming.htm

This post has been edited by soven: Jul 23, 2007 - 12:35 AM