Pelican Parts Forums

Pelican Parts Forums (
-   Porsche 911 Technical Forum (
-   -   Installed a Subwoofer under the seat! (

Elu 08-31-2005 01:46 PM

Installed a Subwoofer under the seat!
So in ongoing postings that I have made regarding some of the upgrades to my car here is my latest venture. Where to install that subwoofer? I read all of the postings here and did a bunch or research online and many people suggested putting a 10" sub in the smugglers box, in the back seat area, a bazooka tube in the front and the list goes on and on....

I don't know how many of you think like I do, but I don't want to mess with modifications to my car just to accommodate some bottom I purchased a Kenwood KSC-SW1 KSCSW1 Powered Enclosed Subwoofer and installed it under the driver's seat! and BAM! excellent sound. I already had a 150 Watt amp under the passenger seat with (4) 150 Watt speakers in the doors and back interior quarter panels but really had no bottom end. So when I purchased the Kenwood, it came with all the cables in an easy to do kit which required no modifications to my interior and or components.

For those of you who are thinking about the thump thump thump irritation driving down the street in the "Hondas" and's not that way. It does give plenty of punch but it's not annoying to your fellow drivers. With a little tweaking of my EQ settings it gives just the right amount of punch to accentuate the low tones. You can definately feel it if you want to, or you can tone it down just a little. The wife may like it under her seat...who knows? :rolleyes:

As far as the modifications I had to make....None really. I had to pull out the seats, run some wiring under the carpet over the hump and screw the unit to the undercarriage. I cut the rear carpet just a little to allow for the installation. I wouldn't suggest just sitting the unit under the seat because it will migrate and with the carpet underneath the didn't quite clear the seat when I was seated in the car...and no I don't have a big ars...

Evans, Marv 08-31-2005 02:06 PM

Wow, didn't think there was room enough under the sear.

Carl83911 08-31-2005 03:19 PM

Post some pics.

I just had a custom box made that fit perfectly on the floor behind the driver's seat.

WydRyd 08-31-2005 05:06 PM

Elu, thanks for the post! Great recommendation there! I'll look into it myself.

I have little kids, so I can't put a bulging subby box behind my seats and steal their leg room :(

This Kenwood box looks like it'll do the trick nicely ;)

FenderGuy 08-31-2005 05:14 PM

Like the others I would love to see the install pics and of the box...I will be doing 4 components ( front doors and quarter panels) but was wondering were I would put the bass in the car

VaSteve 08-31-2005 06:06 PM

Please post some photo. I just dropped in an amp and some over active tweeters - now my 6" door speakrs can't keep up.

Por_sha911 08-31-2005 06:56 PM

Everyone chant:
"this post is worthless without some pictures"

WydRyd 08-31-2005 06:59 PM

Yes please, post some pics of the install if you have 'em.

When my budget permits, I want to get a set of Focal 165K2 separates, Audison SRX4 AMP and some sort of subby. The Kenwood looks damn good!

Description: Kenwood's KSC-SW1 subwoofer may be just what you need if you're looking for more bass, but don't have space for a conventional sub box or powered sub. This compact sub features an amplifier that pushes 75 watts RMS to a 6-1/2" woofer, with a 6-1/2" passive radiator built in for good measure. It's all housed in a rugged, low-profile enclosure that will fit just about anywhere. The passive radiator technology is one of the keys to the surprisingly big sound of the KSC-SW1. Air pressure from the powered woofer moves the unpowered 6-1/2" radiator, augmenting the bass response.

87coupe 08-31-2005 08:00 PM

You can achieve the same, if not better bass results from 6.5's in the doors if you enclose them. And you wont have two 6.5's vibrating the crap out of your DME.

WydRyd 08-31-2005 08:23 PM

Is that what you've done Brandon?


87coupe 08-31-2005 08:31 PM

I've done door enclosures in other cars, not in my p-car though. I'm not really concerned with the radio in the porsche, the car makes it's own music ;)

If one were so inclined the passenger side kick panel make a good spot for a custom 6.5" or 8" enclosure. I've also seen custom center consoles that utilize the forward compartment space to mount up to a 10" sub that fires sideways.

randywebb 08-31-2005 10:28 PM

Remember, these things do not alter physical laws -- you still need a big box to get long wavelengths, aka low frequencies, aka a real sub-woofer (& that's true whether it is an acoustic suspension design or a Thiel-Small alignemnt {has a big hole in it, called a port}). These will help with the "upper" lows but won't provide what a real sub-woofer will.

Chuck Moreland 09-01-2005 08:23 AM

I tried a sub under the passenger seat once. Two problems; the person sitting in the seat found it annoying, the enclosure was small as Randy points out.

Elu 09-01-2005 08:59 AM

[QUOTE]Originally posted by WydRyd
[B]Yes please, post some pics of the install if you have 'em.

When my budget permits, I want to get a set of Focal 165K2 separates, Audison SRX4 AMP and some sort of subby. The Kenwood looks damn good!

OK...Pictures. I will get some tonight and post them. They are really uneventful because it just sits under there...bolted to the floor. However, I can take a shot showing how it sits in proximity to the seat and such for you hard liners.:rolleyes:

"Chuck" The vibration under the seat is not noticeable to the person in the seat unless you really push up the bass...and then it messes with the overall sound quality. Everything in moderation is the key. You get the thump and drone of the low tones but it is not annoying.

"Randy" I can't explain it...but it really works. It is similar to an upper end computer sound speaker set. I use one on my TV as and it shakes the room. This sub system is not cheesy or small in sound, it's HUGE! I kid you not! I think that I have a little clout on the issue as I am a recording artist and producer and know alot about sound, maybe not the mechanics of the systems as they are put together but I do know what sounds good. I listen to alot of Dance oriented music with club beats and sub-tones and it doesn't distort. I also listen to alot of low end chill out music and stuff like Enigma, Delerium, B-Tribe, Conjure One, Sting...and it all sounds big and boomy. If I turn it up too loud it's unbearable cuz it's so loud.

So seriously if you guys are thinking about this seriously...just do it, it works. And again, it will not be as loud as a bazooka tube or (2) 10" subs at 250 watts each...but in a small P-car...who needs that? The Kenwood is plenty of big bass sound for the small space.

randywebb 09-01-2005 11:18 AM

I understand what you are saying...

But that isn't really "sub" - the best description I can give is to listen to orchestral music with true, low frequencies -- around 20- 30 Hz.

Not to say that the item above and other similar things will not make your listening more enjoyable and/or make the sound more accurate.

FWIW, folks who want lower frequencies can search up posts by bell on using the smuggler's box for a sub - that would be my next choice after this -- more trouble to do tho.

islandflyer 09-01-2005 11:46 AM

There is also a Clarion product that also fits under the seat. It is almost the same size as this kenwood. Asfar as sound quality I have no clue witch is better.

BlkBird 09-01-2005 12:20 PM

I must admit I'm surprised it doesn vibrate anyone sitting above it, or rattle against the metal floor. Otherwise I'd have tried this solution.

Then again under the seats is prime real estate and all ready occupied by XM radio box, DME and Andial Fuel Enrichment system.

Superman 09-01-2005 01:07 PM

With all due respect to the comments I have heard many times about needing a big enclosure in order to make low bass frequencies, I know that to be bunk. Thirty years ago they were making home stereo speakers less than two inches thick. I used to play bass, and some of the Ampeg systems used 4" speakers. Lots of them, but only 4" in diameter. Yes, a bass speaker can be made that fits under our seats, and it's about time somebody did it. And finally, what about a system that bolts to the car. This way, the car becomes part of the speaker and now you have the very big box so many folks insist you need.

I mounted a 10" speaker in a home-made triangular enclosure barely large enough for the speaker, and it fits right behind my seat. But again, there is no reason a unit cannot be made that's the size of a 2" loose leaf binder that fits under a seat.

Elu 09-01-2005 01:21 PM it's not technically a sub. Air pressure from the powered woofer moves the unpowered 6-1/2" radiator, augmenting the bass response. In essense a sealed enclosure producing sub sonic vibration.

I've read about 100 reviews on the Clarion and the Kenwood and from what I hear, the Kenwood out performs the Clarion in frequency response. That was said by many who tried both. The important part is that it fits under the seat and it bolts to the floor!!!

Anyway...I will see about some pictures.

randywebb 09-01-2005 03:49 PM

It's not bunk. Run the model equations and/or measure output vs. frequency. You are probably reacting to high amplitude "thump" in the higher bass registers -- I would bet around 100 Hz.

But most people think a high amplitude "semi-low" freq. is good bass response -- it isn't. Or at least it isn't accurate - what one thinks is good is subjective.

IF you like the higher amplitude in the mid to high bass registers, that is fine. If you need more lower down, then see my comment above. If you want a real high fidelity music system, down to 20 Hz, it costs a few ten thousand dollar bills and that's in your home. It's probably not possible in the car.

All times are GMT -8. The time now is 08:41 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.