proper sound imaging for a std cab
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Senior User
Joined: Nov 2003
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From: WA
proper sound imaging for a std cab
I recently decided to upgrade the sound system in my truck. So I purchased an Alpine 9811 with 6.5" infinity component speakers. I plan to mount the woofer in the stock door location with the tweeter mounted high on the door panel. The stock AM speaker location is located in the center of the dash and I have a question as to wether I should purchase two small speakers and mount them side by side or if I should purchase the 5x7 dual coil speaker that is offered by ***? Which would sound better? Which would have better stereo imaging?
Secondly My gas tank is mounted behind the seat and I have no plans of removing it. Is there any place to locate some subwoofers? I have racked my brain for months and cannot come up with any ideas. At this point I am hoping that the Infinities will have enough bass so I won't need the subs. Their frequency range is from 45hz to 22khz and they are rated for 90W with a sensitivity of 90.
BTW I would rather not cut up anything.
Any help would be greatly appreciated.
Secondly My gas tank is mounted behind the seat and I have no plans of removing it. Is there any place to locate some subwoofers? I have racked my brain for months and cannot come up with any ideas. At this point I am hoping that the Infinities will have enough bass so I won't need the subs. Their frequency range is from 45hz to 22khz and they are rated for 90W with a sensitivity of 90.
BTW I would rather not cut up anything.
Any help would be greatly appreciated.
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Joined: Oct 2003
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A trick that i have seen done was where the guy mounted his woofers in a toolbox behind the cab.
dunno how much work you want to do or cutting, i.e. cutting holes through the bed to the cab and such.
i would, if me in that situtuation, is to talk to a professional installer at a shop and see what he recommends.
8 inch subs could mount in the lower door panels, but may have to build a custom box that sits low so you won't mess with the travel of your windows. and make sure you have good weatherstripping along the windows so you don't get rain down in the doors and messing with the speakers.
Another option is to see if there is a free-air sub-woofer in the 8" compacity, and if so, you could mount those to the door, or with a frame, you might possibly be able to mount those under the seat (I had the room for those in truck).
I was entertaining the idea of cutting a hole through the bed into the cab and getting some stripping like they use for campershells to seal the hole in, and having a metal box build in the bed to house my stereo speakers. my gas tank was external.
something about having a gas tank in the cab scares me.
dunno how much work you want to do or cutting, i.e. cutting holes through the bed to the cab and such.
i would, if me in that situtuation, is to talk to a professional installer at a shop and see what he recommends.
8 inch subs could mount in the lower door panels, but may have to build a custom box that sits low so you won't mess with the travel of your windows. and make sure you have good weatherstripping along the windows so you don't get rain down in the doors and messing with the speakers.
Another option is to see if there is a free-air sub-woofer in the 8" compacity, and if so, you could mount those to the door, or with a frame, you might possibly be able to mount those under the seat (I had the room for those in truck).
I was entertaining the idea of cutting a hole through the bed into the cab and getting some stripping like they use for campershells to seal the hole in, and having a metal box build in the bed to house my stereo speakers. my gas tank was external.
something about having a gas tank in the cab scares me.
Posting Guru
Joined: Oct 2003
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From: northern ca
In cab tanks scare me too, but I think the logic is, if its there you won't poke a hole in it when you're fourwheelin
anyway I think you could mount 2 four inch speakers in the dash, and you might want to play with the phasing for the best imaging, as the sound will be bouncing off your windshield
I've heard of people building front consoles to house subs
anyway I think you could mount 2 four inch speakers in the dash, and you might want to play with the phasing for the best imaging, as the sound will be bouncing off your windshield
I've heard of people building front consoles to house subs
Elder User
Joined: Jul 2003
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From: west central florida
I know of a guy that recessed two metal boxes below the floorboards under the front seats and mounted two 8" subs, he needs room behind the seat for tools and such ......sounds real good and looks good too.....6.5 door speakers do the trick up front. Whatever you do make sure you have amps big enough to power your speakers or you wont get their full potential. 
Posting Guru
Joined: Jun 2003
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From: Des Moines, Iowa
hey, i have those infinity speakers, and they sound awesome. depending on your tastes they might have enough bass for you.
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From: WA
Thanks for the input. I plan on buying an amp later on. I was thinking of getting a US Acoustics 2100 which is a 100W X 2ch amp. This amp will be used to run the infinities. I will most likely mount it under the seat. I also bought a whole role of dynamat to help deaden the sound in the doors.
I guess I failed to include all the specs of my truck. Its a 74 F-250 4wd highboy with a rebuilt 390ci engine mated to a 4spd new process transmission with a divorced np205 transfer case. It has a dana 44 upfront with the dana 60 in the rear. It has been recently repainted the stock color midnight blue metallic and has both the winch bumper and rear bumper powder coated metalic silver.
My plans for the future include edelbrock heads and headers. I also plan to convert the factory power assist to full power steering.
I guess I failed to include all the specs of my truck. Its a 74 F-250 4wd highboy with a rebuilt 390ci engine mated to a 4spd new process transmission with a divorced np205 transfer case. It has a dana 44 upfront with the dana 60 in the rear. It has been recently repainted the stock color midnight blue metallic and has both the winch bumper and rear bumper powder coated metalic silver.
My plans for the future include edelbrock heads and headers. I also plan to convert the factory power assist to full power steering.
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dont put the center speaker in because it will mess up the imaging from the components. I have them in my truck running off a premier reciever, and they distort before i hear the bass at road speeds. I put a 12 behind the seat. As for your gas tank prob, rockford makes some 6.5" subs that could have a custom box built for( i believe they handle 150RMS) and put them in the lower door. i dont know how big the gas tank is, but maybe ther eis room for them back there. i wouldnt put them i a toolbox. good luck
Cargo Master
Joined: Sep 2003
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From: TX
i had been havin the same probs as u...not havin a place to put subs. i was able to fit some 10's back there tho but i had to sit with my chest on the steering wheel lol. i got tired of that and took the gas tank out, it was really easy. but i already had dual tanks and i never used the one behind my seat ne ways so it wasnt a loss to me. i dunno....somethin about havin 15 gallons of gas sittin behind u and bein able to hear it slosh around just kinda makes u wonder what would happen if u got t-boned hard enough lol. BOOOOM
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the problem i had was that the components couldnt make enought bass to over come the noise of my truck. With the engine off they sounded great, but my tires/drivetrain/exhaust cancelled all the low end. For true bass, i needed a dedicated sub. The center speaker will make the mids and highs sound louder, but even if its a dual cone setup, it puts out the left channel sound on your right side. This is what will cause the imaging problems, because each ear will hear the same sound, so its not true stereo. This will also be true for the passenger, but they will here both right channels. If you are going to put the infinitys in and dont care about booming bass, that amp will do fine, but i would recommend the us acoustics USB-2080 instead, since these amps are underated and the 100 watts RMS will really be pushing the speakers limits.
