Don’t you hate it when you’ve got a nice new set of subs and an amp, and all of a sudden you find your ears have adjusted to the bass? You can’t help but wish for more. There are a few tricks to increasing the bass in your car without taking any extreme measures.
Go Ported or Go Home
If you don’t have one already, try upgrading to a ported enclosure. By doing a simple enclosure swap, which will usually run you $40-50 bucks for a prefabricated one, you can gain up to an additional 6dB of volume. That’s a pretty big increase for those with smaller subwoofer applications.
PolyFill – You’re New Best Friend
Polyester fiber is the same stuff you will find in stuffed animals. Staple some of this to the inside of your enclosure and remount your subwoofer(s). What happens is the polyfill will slow down the frequency waves, thus increasing the amplitude of each note. Its science, folks.
Double the Power, Double the Fun
A general rule of thumb, you can gain an additional 3dB by giving your subwoofer a little extra power. Now let’s not overdo it and clip your sub, but if you have a subwoofer and amplifier that have their power matched (example 300w and 300w RMS), chances are you could have gone with a slightly bigger amp and the sub would have handles the additional power just fine. If it turns out to be too much power, back the gain down a bit and you’ve got yourself some nice headroom, which never hurts.
Don’t Let Air Leaks Get You Down
If you designed and built your own box, that’s fantastic! But be very cautious, as any air leak will completely destroy your SPL. Turn on a 35-40Hz test tone (you can download a tone generator app), and listen to your enclosure at all angles. If notice any air leaks, seal those suckers up with some calking or wood glue.
Most subwoofer companies will include specifications in the manual as to what the optimal enclosure dimensions are. If you abide by these specs, you’re in the gold. Whether or not your enclosure is well-built will determine how well your subwoofer will perform. The better your sub performs, the louder it gets.
Upgrade Your Amplifiers Ground
I see many cases where people will buy a cheap wiring kit, screw the ground to some metal in the car and call it a day. Bad! The better your wires, the less resistance your electrical system has. The lower the resistance in your cables, the more efficient your equipment will run. Your amp can produce a little more power by simply creating a better ground connection. Brush off any paint in the way, and use either a bolt or multiple screws to secure it tight. Nothing says “I’m a noob” like using crappy power/ground cables.