Looking to upgrade the stock stereo in my crew cab. I want a subwoofer, just wondering what enclosures people have been using and where they have been mounting them. My last truck ('95 ext cab) had a JL Audio stealth exclosure under the rear seat....real clean. I'm not sure what is available for the crew cab.

www.subthump.com two 10.inch down fire great box do a search on this plenty info

I just installed this box from subthump in my crew cab, it fits very nicely. I have 2 JL 10W3V2 and it sounds very good.

Chris

what amp are you using? and did you use a pac unit to get rca outs

I have the PAC, but I am not using the stock stereo. I have the Clarion 755 in-dash DVD with an audio control 3.1. The amp that powers my subs is a PPI PC2600 Chrome, it is running bridged at 600x1. Subs are wired in series so they are getting 300 each(they are rated at 300 continuous). I have Boston PRO60's in the Front and Boston 2 ways in the rear powered by Alpine V12 545.

Boston Is Good Stuff I Just Listened To The New G5124-4 In A 1 Cubic Ft. Box They Sound Good

Hey bulitnv, can your back seat still fold down, I looking at the same set up. Thanks Erich.

I had two 10" JL's in my '98 Crew Cab GMC. The box was custom made to fit beind the rear seats and hit pretty hard. I have heard other peoples sub boxes and havent been that impressed. I would really like to run a single 12" but really wonder how good the subthump boxes are...

tks,
Matt

I picked up my new subthump box tonight from Steve at SubThump.com. He custom makes sub boxes for many makes and models of vehicles.

I will be installing my sub-thump box tomorrow, to replace my single 10" behind the rear seat. I am going with dual 10s.

The sub-thump box is well made and top notch. It is made from 3/4" MDF board.

Steve's boxes do NOT require cutting of the rear seat floor bracket with a saw-zall as other vendors require.

I am not aware of any boxes that fit under the rear crew cab seats and still let you fold them completly down.

I think Steves 8" subthump box will allow the seats to nearly fold own.

When I get my box installed, I'll post some photos.

If you call steve, tell him Andrew referred you. :)

765-827-0916
sales@subthump.com

Thanks Andrew, for your post. I've been on that site, those boxes do look great. Look forward to your pics, take care. Erich

I have only heard good things about subthump boxes.

andrew did you go with two 10,s or 8,s and what amp are you running with them, oh yeah what drivers?

They must be busy since I have dual 10” under the seat unit coming also. We should have done a quantity buy!):h

Andrew, where are you mounting the amp? I will be tearing into my truck hopefully in the next week or so.

WI huck did you go Alpine amp and Infinnity subs, if so you will be happy,

Looking to upgrade the stock stereo in my crew cab. I want a subwoofer, just wondering what enclosures people have been using and where they have been mounting them. My last truck ('95 ext cab) had a JL Audio stealth exclosure under the rear seat....real clean. I'm not sure what is available for the crew cab.
JL Audio has a stealthbox for the crew cab I have one and it sound great!! Check out JL's website. www.jlaudio.com

I got the 12" subthump super deep box to fit my boston pro 12 and it fits like it was meant to go there from the factory. Subthump gets two thumbs up from me for sure.

I got my subs installed tonight. I bought two Sony 10s and two MTX Thunder 5510s today from two local stores. I had a feeling of which ones I was going to choose, but I decided to do a comparision test of the two.

I liked the overall sound from the MTX Thunder 5510s so I installed them. I'll try them for a week, and then possibly go back to the Sony's because they have a higher RMS rating. I also filled the box with a bags worth of poly fill (for pillows) that I picked up at wal-mart.

The MTX 10" 5510s have a frequency range of 35 Hz thru 150HZ. What this means is they are tuned very well for these low frequencies compared to the sony.
These subs are rated for 300 watts RMS
They are recommended for at least a sealed box of about .70 cu ft.
They are Single coil, 4 OHM.
They cost $129 each.

The Sony 10" XSL102P5 have a frequency range of 18Hz to 2.5 kHz.
They are rated for 1500 watts RMS 330 constant.
They are recommended for at least a sealed box of about 1.0 cu ft.
They are single coil, 4 OHM.
They cost $94/each.

I am using an older Kenwood KAC-927 amp that is 400 watts a channel or 800 watts bridged. (http://members.fortunecity.com/cyber01/amps/page031.html) I figure since I am not pushing the amp to its maximum, the 300 RMS rating of the MTX subs should handle the power from the AMP. I am no audio expert, so I do not know if I am playing with fire here :)

I ended up hooking the subs up in a series and using the 800 watt bridged output of my amp. I am using a PAC adapter from the head end unit in the dash.

If you are looking to have people outside of the dmax hear your bass, don't get your hopes up too much. It appears that the insulation job GM did to help reduce the amount of engine noise in the cab, works. If the windows are down, it is heard.

I played a combination of rock, pop, country and ccm and was impressed with the overall performance of my subthump box.

I am going to buy some type of SPL meter to do some of my own testing.

I did download some SPL test mp3s and burned them to a CD and played them in the factory head end unit. OMIGOSH! I gave my self a headache!!

I found the mp3s at: http://www.realtraps.com/test-cd.htm

I played the mp3s in the house and then went outside to test it in the truck.

Photos should be available on the new subwoofer install website sometime tomorrow.

If you want too hear my setup and are in the area, just send me a PM.

- Andrew

I mounted/wedged my amp on my back wall. It is not bolted or screwed to anything. It just happened to fit nicely.

There is a photo of it, on my old setup at: http://duramax.onlinedesk.net

I left it in the same place for my new setup.

I also installed a capacitor which I found really helped on the low bass notes, and not pulling as hard on the electrical system.

- Andrew

WI huck did you go Alpine amp and Infinnity subs, if so you will be happy,

I'm waiting on my single downfire from subThump. But I already have the infinity perfect 10.d dvc sub and an alpine 605 amp with the amplink connected to an alpine 9855. The infinity alpine combo seemed to be one of the bests. can't wait.

ok, I finished the write up on my subwoofer install, complete with pics.

If I am missing any info, let me know and I'll update accordingly.

I must say, the system KICKS very hard! :ro) :ro)

http://duramax.onlinedesk.net/subwoofer/index.htm

Whats the purpose of the larger cap, is it just to eliminate ignition noise ?

Andrewfessler
Sony's are crap take them back this isn't my 0.02 this is a fact.

Capacitor? It holds up a power near the amp, when the amp hits a deep note, instead of pulling the amperage need through the power cable all the way to the battery, the capcitor, which is near the amp, delivers the extra power needed for the note.

It helps to extend the life of ones electrical system, batteries and alternator, IMHO.

Whats the purpose of the larger cap, is it just to eliminate ignition noise ?

Oddly, the specs on the Sony are better than the MTXs, but the MTXs kick harder. Granted, if I spent more money on subs ($300-500) then I probably wouldnt have purchased MTXs.

I was in the truck tonight for an extender period of time, I must say, I am still extremely happy with the quality of bass I now have. Definately worth the money. ($168 for the box and $130x2 for the subs)

Andrewfessler
Sony's are crap take them back this isn't my 0.02 this is a fact.

Oddly, the specs on the Sony are better than the MTXs, but the MTXs kick harder. Granted, if I spent more money on subs ($300-500) then I probably wouldnt have purchased MTXs.

I was in the truck tonight for an extender period of time, I must say, I am still extremely happy with the quality of bass I now have. Definately worth the money. ($168 for the box and $130x2 for the subs)

That's just it, specs are just numbers. You really don't know until you try it out. Sony's car audio stuff has gone too mainstream, they used to make good stuff now they're just out to make a buck with their name.

capacitors are a good fix if there is electrical problems. such as a small alternator or battery. on a diesel with a large alternator and batteries a cap is a waste of time. besides that the amp needs to be a high current model. on the typical alpine, sony, mtx type amp it really does no good. it would have more of a effect on a fosgate or jl amp. alot of times they are used to eliminate noise in the system. i use to compete in iasca pro and was a installer for 7 years. imho they created my problems then they were worth.

I disagree. Even on a diesel while you do have two batteries, at idle, the alternator is not putting full power out.

Sure, I could high idle the dmax while listening to bass, but why do that when I can install a cap to help handle the surge in power?

I definately noticed after I installed my cap, no more dimming lights. The surges from an amp when playing bass is not good, long term, on the AC delco batteries or the alternator. There is another thread on here about killing batteries with amps.

to get the most gain from a cap it needs to be a high current amp. most amps are current limiting which will not gain much from the extra amps that a cap can dump into it. a cap will dump its complete load in a tenth of a second. so on long bass notes it is depleted and actually becomes more of a load on the system. alot of people use them on spl contest when they need a quick amount of power to hit a fast bass note. the nice thing about a cap is it does recharge just as fast. for some poeple they seem to work great, i just think theres better ways to spend the money.

andrewfesser... what is the oil vavle on your truck for?

a good quality capacitor that is sized correctly will complement any system, but were initially designed for high current amps. a capacitor will keep supplied voltage at peak, thus allowing the amp to work at 100% efficiency. the discharge and recharge cycles happen quicker than you can monitor, i wont go into the timing here.

a good rule of thumb for sizing is .5 farad per 500 W of power the amp(s)supplies and keep it as close to the amp as possible. they are not a fix for electrical problems or undersized electrical system, they will maintain what is being supplied to them.

oteo, amplifier brands dont matter, specs such as amp draw and class are the only way to be sure. they are NOT a waste of money, that is unless you purchase an inferior one. if you competed in IASCA events, you undoubtedly should have seen them in 95+% of vehicles, I sure did and never had any problems when installing them...................

yes they are in a lot of cars at shows and yes certain amps will have a bigger advantage with them then others. if the electrical system is week the only thing a cap does is create another draw on the system. i would suggest a better battery or alternator before the cap. a lot of people would come in and say my headlight dim down or my car goes dead and think a cap will fix the problem. a cap does not fix these problem only supply a little more juice for the amps. I'm saying i believe a lot of people get caps for the wrong reasons and most of the time they are exceeded their electrical system and need to take other measures. everyone has their own opinion and i respect that. experience has taught me that most people buy them for the wrong reasons and have unrealistic expectations of what they do. here is my car that i completed with. having around 2000 watts, caps did nothing for me. i had two gel cells with stinger h.o. alternator. but i will agree every-ones system is different and has different needs.
http://www.sounddomain.com/ride/120275

Caps are a waste most of the time they're just a bandaid. The first thing you should have done is the "Big 3.” That’s where you upgrade the pos./neg. off the battery and alternator.

Oteo
Have you posted pic of your setup? I looked at your SD kind of a JL whore arn't we.

WI huck did you go Alpine amp and Infinnity subs, if so you will be happy,

:thumb: Patiently waiting for the delivery guy to get here….:rolleyes: