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> Sub Woofer Installation, Tried to get better Audio without carving up the car
ctc911ctc
post Jan 28 2019, 06:42 PM
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All,

Been silent, very cold - garage is a 100 year old Yankee version, no heat.....will not hold any. So, my 17yr old son and I decided to upgrade the speakers (the old ones were absent any cone material).

Found a set of KFC-4675C (kenwood) that fit the spec, integrated mid range and tweeter. Now for the low range. We decided that carving up the car and running a large alternator and battery was not for this car, we are trying to restore it to 80-90 points. So we are using a passive crossover, the original tuner with a power amp that was installed in the 80s, still works (both units are Blauplunkt). We have about 40 watts - more than enough for the size of the car.

When we rebuilt the car we installed sound deadening material in the engine bay, passenger compartment and will put it in the trunk. Amazing how quiet the car seems in the passenger compartment now.

My son had the idea to install the Subwoofer in the engine compartment, cut through the back seat - had to explain the concept of FireWall to him, we looked at a dozen other places and settled on what I think is a very elegant solution.


Our car is a '74 2.0, Silver. So it has a center console. We are installing it there!

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First, where should the speaker go????

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Wow - no particle board - furniture grade ply!

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Peel back the Vinyl, careful!

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Counter sync for flush hidden finish

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Score the vinyl, perhaps we can STRETCH it!

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Heat gun and PULL, gently

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Look at that circle, no wood showing, barely a wrinkle!

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Add a screen

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Bolt that Micro SubWoofer in place

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What the Passenger will see

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Perfect Fit

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Passive Crossover


Will post a note as to how this sounds in a few weeks (months?)


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Posts in this topic
ctc911ctc   Sub Woofer Installation   Jan 28 2019, 06:42 PM
preach   Pretty good spot. My Cayman's factory sub is a...   Jan 28 2019, 06:54 PM
MiniStevieG   All, Been silent, very cold - garage is a 100 ye...   Jan 28 2019, 07:48 PM
ctc911ctc   I love it. Nice work man! Very impressed wi...   Jan 28 2019, 08:18 PM
windforfun   Don't forget to reverse the phase relative to ...   Jan 28 2019, 07:56 PM
ConeDodger   You could have just purchased this already made fr...   Jan 28 2019, 08:02 PM
Mikey914   Nice work, but to get decent sound you need to box...   Jan 29 2019, 02:00 AM
ctc911ctc   Nice work, but to get decent sound you need to bo...   Jan 29 2019, 09:01 AM
amfab   Nice work, but to get decent sound you need to b...   Jan 29 2019, 10:37 AM
ctc911ctc   [quote name='ctc911ctc' post='2684618' date='Jan ...   Jan 29 2019, 04:44 PM
Chi-town   There's a guy on ebay who sells this set up to...   Jan 29 2019, 10:27 AM
Chris914n6   Speakers need to be in an enclosure to be effectiv...   Jan 29 2019, 11:54 AM
dr914@autoatlanta.com   best to put the sub woofer where the passenger foa...   Jan 29 2019, 12:09 PM
Rand   best to put the sub woofer where the passenger fo...   Jan 29 2019, 12:38 PM
horizontally-opposed   best to put the sub woofer where the passenger fo...   Jan 29 2019, 04:25 PM
drem914   best to put the sub woofer where the passenger f...   Jan 29 2019, 05:11 PM
horizontally-opposed   The sub box you seek is available at 914Rubber.co...   Jan 29 2019, 05:55 PM
horizontally-opposed   The sub box you seek is available at 914Rubber.co...   Jan 29 2019, 08:35 PM
burton73   best to put the sub woofer where the passenger fo...   Jan 14 2020, 04:40 PM
914forme   :agree: Or ported, band passed, etc.... And then ...   Jan 29 2019, 12:45 PM
Mikey914   Not a failure, just brought up the sealing to help...   Jan 29 2019, 12:54 PM
Jonathan Livesay   I made this one, with a dedicated power amp for th...   Jan 29 2019, 05:29 PM
horizontally-opposed   I made this one, with a dedicated power amp for t...   Jan 29 2019, 05:56 PM
Jonathan Livesay   I made this one, with a dedicated power amp for ...   Jan 29 2019, 06:51 PM
SteveL   Sorry for the hijack but.... I need to replace the...   Jan 29 2019, 08:53 PM
Mikey914   Just hearing up for another run. Finished off the ...   Jan 30 2019, 02:15 AM
Mikey914   More   Jan 30 2019, 02:16 AM
Mikey914   This will allow you to add it later as an option.I...   Jan 30 2019, 02:18 AM
Mark Henry   I have to figure out this as well for my 914. I ha...   Jan 13 2020, 01:02 PM
Mikey914   There is some room in the center section of the 3 ...   Jan 13 2020, 04:09 PM
Mark Henry   So hacking on the interior, I don't want to cu...   Jan 14 2020, 07:39 AM
horizontally-opposed   So hacking on the interior, I don't want to c...   Jan 14 2020, 12:37 PM
Mark Henry   I have the morph footwell 8" sub enclosure, i...   Jan 14 2020, 03:57 PM
oakdalecurtis   "reason I don't care for the console is b...   Jan 14 2020, 04:28 PM
R Dub   ctc911ctc what sub did you go with? Also have you ...   Jan 18 2020, 02:03 PM
ctc911ctc   How does it sound? In the 70's I worked at Mi...   Jan 18 2020, 10:14 PM
horizontally-opposed   Maybe a stupid question, but: Could the doors be u...   Jan 18 2020, 07:25 PM
steuspeed   Maybe a stupid question, but: Could the doors be ...   Jan 19 2020, 06:14 PM
gereed75   I know this is a DIY spirited kind of thread, but ...   Jan 19 2020, 09:57 AM
914forme   the trunk is semi sealed from the cabin. You usin...   Jan 19 2020, 09:59 AM
FlacaProductions   I'm away from my 914 for extended periods so I...   Jan 19 2020, 11:26 AM
Chris914n6   I'm away from my 914 for extended periods so ...   Jan 19 2020, 03:06 PM
tomeric914   These are all great suggestions to the OP, but he ...   Jan 19 2020, 11:54 AM
FlacaProductions   Dang- that's what I thought   Jan 19 2020, 04:15 PM
Chris914n6   Dang- that's what I thought Peaked my inter...   Jan 23 2020, 12:06 AM
horizontally-opposed   It's seriously tricky. Everything I've t...   Jan 23 2020, 12:39 AM
messix   check this thread out. my sub box that is now sol...   Jan 24 2020, 01:16 AM
FlacaProductions   @messix - I think that's the way to go but I ...   Jan 24 2020, 09:34 AM
Mikey914   [b]@[url=http://www.914world.com/bbs2/index.php?s...   Jan 24 2020, 01:22 PM
Johny Blackstain   We are actually retooling on these right now. I...   Jan 24 2020, 01:28 PM
Mikey914   We are actually retooling on these right now. I...   Jan 24 2020, 01:47 PM
horizontally-opposed   We are actually retooling on these right now. I...   Jan 24 2020, 01:41 PM
bbrock   [b]@[url=http://www.914world.com/bbs2/index.php?...   Feb 9 2020, 11:10 PM
bbrock   [b]@[url=http://www.914world.com/bbs2/index.php?...   May 31 2020, 08:05 PM
dr914@autoatlanta.com   the best place is to put a sub woofer is where the...   Jan 24 2020, 10:12 AM
horizontally-opposed   the best place is to put a sub woofer is where th...   Jan 24 2020, 11:45 AM
drem914   [quote name='dr914@autoatlanta.com' post='2780249...   Jan 24 2020, 11:58 AM
Rand   I can vouch for Troy's setup. It kicks.   Jan 24 2020, 11:26 AM
914forme   @horrizontally-opposed Pete, I have picked a JL Au...   Jan 24 2020, 12:24 PM
horizontally-opposed   @horrizontally-opposed Pete, I have picked a JL A...   Jan 24 2020, 01:44 PM
bbrock   @horrizontally-opposed Pete, I have picked a JL A...   Jan 24 2020, 09:17 PM
burton73   Posted on my 6 build. From Eric @PMB:

 ...   Jan 24 2020, 01:51 PM
FlacaProductions   What Pete said.   Jan 24 2020, 03:43 PM
Mikey914   We are in the process of changing up some tooling,...   Feb 10 2020, 01:42 AM
bbrock   We are in the process of changing up some tooling...   Mar 13 2020, 11:15 AM
BeatNavy   Any news on this? :popcorn: Baby needs her bass.....   Mar 13 2020, 11:29 AM
tvdinnerbythepool   @mikey914 count me in!   Feb 10 2020, 10:37 AM
Chris914n6   8" ? what's the internal volume? Looks a...   Feb 10 2020, 01:26 PM
horizontally-opposed   http://www.914world.com/bbs2/uploads/post-2058-1...   Feb 10 2020, 02:01 PM
Chris914n6   [quote name='Chris914n6' post='2784795' date='Feb...   Feb 10 2020, 04:17 PM
horizontally-opposed   Another idea...shallow-mount Pioneer sub designed ...   Feb 15 2020, 07:58 PM
horizontally-opposed   Also interesting, at $92… https://www.amaz...   Feb 15 2020, 08:37 PM
914forme   the 12" version of the infinity gets really g...   Feb 16 2020, 05:27 PM
Mikey914   Yes we will be providing just the vented unit, you...   Feb 16 2020, 08:17 PM
911GT2   Maybe it's a bit against the purpose of this t...   Feb 17 2020, 07:05 AM
maf914   Maybe it's a bit against the purpose of this ...   Feb 18 2020, 03:59 PM
ConeDodger   Here’s my sub. Fiberglass box replaces foam bloc...   Feb 17 2020, 09:48 AM
horizontally-opposed   Here’s my sub. Fiberglass box replaces foam blo...   Feb 18 2020, 04:32 PM
ConeDodger   Here’s my sub. Fiberglass box replaces foam bl...   Mar 27 2020, 01:44 AM
bbrock   Thought I would report that the JL Audio sub menti...   Mar 26 2020, 10:49 PM
Mikey914   Thought I would report that the JL Audio sub ment...   Mar 27 2020, 09:11 AM
IronHillRestorations   I don't know why one would have to go to such ...   Mar 27 2020, 07:06 AM
FlacaProductions   Keep in mind that i'm away from my 914 so tryi...   Mar 27 2020, 10:14 AM
bbrock   Keep in mind that i'm away from my 914 so try...   Mar 27 2020, 10:34 AM
FlacaProductions   Great - following this closely and appreciate your...   Mar 27 2020, 10:48 AM
bbrock   Great - following this closely and appreciate you...   Mar 27 2020, 03:26 PM
bbrock   I haven't found a powered sub that will fit fo...   Mar 27 2020, 10:57 AM
FlacaProductions   I think free air if at all possible...and I wish G...   Mar 27 2020, 03:54 PM
bbrock   I think free air if at all possible...and I wish ...   Mar 27 2020, 06:09 PM
Porschef   I had made an enclosure for a passenger footwell s...   Mar 27 2020, 04:48 PM
bbrock   Posted this on my build thread a month ago but fig...   May 5 2020, 12:35 PM
horizontally-opposed   Posted this on my build thread a month ago but fi...   May 5 2020, 01:19 PM
bbrock   Nice work, and thanks for posting. How much leg...   May 5 2020, 06:18 PM
Mikey914   Yes we have a prototype we've made and we are ...   May 31 2020, 11:32 PM
bbrock   Yes we have a prototype we've made and we are...   Jun 1 2020, 07:15 AM
dr914@autoatlanta.com   have been making this for years, by far the best ...   Jun 1 2020, 08:23 AM
FlacaProductions   That's great George, but from what I can find,...   Jun 1 2020, 08:59 AM
mbseto   You could probably design that to double as a foot...   Jun 1 2020, 09:09 AM
FlacaProductions   Stock appearance/stealth is my goal   Jun 1 2020, 09:20 AM
horizontally-opposed   The board is easy enough to make. I made one by tr...   Jun 1 2020, 09:21 AM
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