I got my subs put in and all hooked up but I am kinda dissappointed with them. In the previous vehicle they about beat you to death but now I just cant get them to do the same thing. I have them in a pikcup now, they were in a car before. I have a theory that my seat is interfering with the transfer of the bass waves. It is from a 90's Ford and it has about 8 inches of thick hard padding that you lean on. Could this be stopping the bass? You cant even hear the bass outside the vehicle. HELP!!!!!!!!

 

You bet the seat is what is soaking up the "resonance" that you enjoyed in your car. For a truck,especially a reg. cab, you need two things for big bass: BIG woofers(or more small ones) & BIG amps. Another thing, buckets seats will help a bunch also,especially if you have a box with 4-10's or 4-8's in it.
Phillip

 

the box size differance might be a negitive too. Truck boxes are some what smaller to save space and dont have the bump as a bigger trunk style box. I have 2 10" Rockford Fosgates in my '86 that i am running 75 x 2 too. the box space for each speaker is about .95 cu.ft. It is a sealed box and hits pretty good....well damn good. It also has alot to do with the amp and head unit and the speakers you are using too. you get a good amp....good bass....you get a good clean running head unit....clean low hitting bass. Get the pic? hope i helped!

Dan

 

One more thing....if you can find the room....one words.....BANDPASS! Need lots of power but it will hit....and hit hard! dont know if you got a reg cab or not....but i think i have seen some truck style bandpasses b4 too. just a thought.

 

Your bass isn't entirely inhibited by the fact that your seat rests directly against the boxes (assuming you have a standard cab truck) The biggest reason that the subs sound weak compared to when they were in your car is that due to air volume.

The pair of 10" Rockford Fosgates I'm running in parallel off of a Rockford 100a2 bridged amp used to reside in my brother's Civic in a diffent box. Then, they kicked hard. Now, because I've put them into a pair of sealed, 0.65 cubic foot boxes, and placed them in the cab of a truck, there is a limited amount of air for the bass to resonate through, thus they don't kick nearly as hard.

Most 10's require at least 0.75 cubic feet of space within the box. To help, try adding some polyfill to the boxes, you can pick this up at any local, car stereo place for about $5. This will slow down the airflow within the box and give it a deeper, richer sound. However, due to the limited open space in a standard cab truck, it's unlikely they will kick as hard as they did in your car, but I could be wrong, so keep trying and keep us posted.

For reference, these link below shows 3 pictures of my sub installation in my truck. I need to clean it up a little, but it was actually harder to build than it actually looks. Any questions or comments, feel free to email me.

http://members.xoom.com/mdunbar420/stereo.htm

Mike Dunbar
89 F-150 XLT Lariat
2wd Std Cab, Long Bed
300 I-6, 5spd Manual Tranny

 

Mikes got a good point. I too have polyfill in my box and it does make a difference. Though i do have about .9 cubic feet per speaker for my 10" RF's in my box behind the seat. The best thing to do is play around with it and see what works best for you...of coarse money sometimes is a prob but stereo stuff never really has a hard time selling either. Gettin of my soap box now!

Dan

 

Hey Nitro,
You didn't mention if you were using a ported or sealed box. If you're using a ported box, then placing the port to fire out the top as close to the middle as possible could greatly increase the spl's you're looking for. I have a regular cab 97 F150 and managed to put a 1.5cu foot ported box behind the seat to house a 10" Cerwin Vega. I am running 150 to 300 watts to it, and needless to say, it's enough to make your ears pop and others to hear it from a far. I built the box with the port out the bottom, but didn't get the BOOM I wanted, and found a HUGE improvement when I placed the port on top. I tried the polyfill stuff, to try to see how clean and tight the bass waves would be, but it took a lot of punch out of the sound. I guess if you have a sealed box, it would be worth it. Last point- sealed boxes take more power, and ported boxes use less wattage to produce more SPL. Anyway, That's my two cents, no change please. Hope this helps.