#1625041 - 04/04/09 01:16 PM
2002 Tundra Access Cab - ID, Ultra, MTX
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keep_hope_alive
in another life, i'm a serial killer
SD I Power Bombed the Undertaker
Registered: 04/24/07
Posts: 13370
Loc: Quad Cities, IL
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Many of you have seen the post in Custom Fabrication regarding the center console sub installation. Now I will share the setup in a 70% complete condition. We have basic covering and cosmetic touches. up till now we have been concerned with functionality. Every aspect of this installation will be re-evaluated and any deficiencies will be addressed.
Equipment:
Alpine IVA-W200 head unit
MTX TA5302 at 2 ohm stereo
MTX TA5302 at 4 ohm bridged
Ultra 10" sub
Image Dynamics CX62 NX30 component set
Wiring - Streetwires, AudioQuest, Monster Cable
Security - Viper (no pictures will reveal any aspect of the alarm system, just know that you won't find what you need in time to disable it.)
we started with the center console sub enclosure
3/4" MDF was used for the entire enclosure. A double thick front baffle was used to recess the Ultra 10" and provide additional strength. The enclosure was sealed with wood glue and clamped. then, i mixed MDF sawdust with wood glue to make a paste that i spread on every internal seam.
two internal braces were added to prevent any settling over time and add additional strength. the end result inside the enclosure isn't beautiful, but it sure is strong.
the truck was pretty resonant, so a layer of the cheap stuff (Fatmat) was an inexpensive way to help add some mass to the floor and tranny hump where the sub would play. we did three layers on the top and sides of the tranny hump, and one layer over the entire rear floor. this pic is about 30% complete.
this was a typical end result
a layer of carpet padding went down to help absorb some road noise and a layer of thick vinyl on top of the padding to protect it from water and to also filter more road noise. we ended up removing some of the vinyl and padding where the seat mounts go.
The factory doors have massive openings. covering and sealing these was a decent amount of effort.
outer door skin was deadened around and behind the speaker and some polyfill padding was siliconed to the outer door skin behind the driver. i've done this in several other vehicles with no issues of water retention and great midrange benefits.
Melamine panels were siliconed and screwed to cover the openings. then deadener sealed over them.
the Image Dynamics CX62 midbass drivers were very deep. I modified the factory mount to maintain the correct angle with the door, then used 3/4" MDF spacer and rubberized foam to help isolate each surface from the other. finally, deadener was used to seal it all up from the inside.
driver side door is done the same way.
we also used carpet, foam, and polyfill to fill any gaps between the door panel and deadened skin. the result is ZERO rattles or buzzes.
battery also received initial attention. it will soon be replaced with a new AGM battery and better posts used. we upgraded battery-chassis and engine-chassis grounds.
used grommets through the firewall for both 4awg and 10awg.
Edited by keep_hope_alive (04/04/09 01:37 PM)
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#1625042 - 04/04/09 01:28 PM
Re: 2002 Tundra Access Cab - ID, Ultra, MTX
[Re: keep_hope_alive]
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keep_hope_alive
in another life, i'm a serial killer
SD I Power Bombed the Undertaker
Registered: 04/24/07
Posts: 13370
Loc: Quad Cities, IL
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head unit installed, we used some "special tricks" to make removing this a complex process.
we are testing tweeter locations with trusty velcro until we finalize a placement. this is their current location. the final installation will not have visible wire and will be flush. 
we will not be sharing the process of securing the amps or sub enclosure. you will destroy them before you get them out unless you understand how they are secured. and there are only two people who know that.
the carpeting around the amps is temporary for cosmetics. i hate visible wiring and will always take steps to hide it at all times. you can see the location of the fused distro block and ground block. we will be changing the grounding so each amp ground separately as one is too long now.
we still have the actual center console to build, but for now i wanted a covering on the enclosure. the end results should look factory. a false cover will hide and protect the amps and will be secured with a keyed locking mechanism.
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#1625084 - 04/04/09 07:39 PM
Re: 2002 Tundra Access Cab - ID, Ultra, MTX
[Re: keep_hope_alive]
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keep_hope_alive
in another life, i'm a serial killer
SD I Power Bombed the Undertaker
Registered: 04/24/07
Posts: 13370
Loc: Quad Cities, IL
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so how does it sound? pretty damn good for no processing and basic tuning. it plays very clean and is damn loud. those ID CX comps really sing. I can see where an EQ can add some benefits though.
the Ultra 10 just slams. with just 300W RMS it moves like mad in that sealed enclosure. it is tight, accurate, and musical. we tested it with a variety of music types, and each one was exactly what we wanted. being in the middle of the vehicle, it experiences little cabin gain from the front seats. this is fine as we want a musical system. basically, the sub bass does not drown out the midbass.
we did some initial RTA measurements. here are our first pass results.
first a baseline measurement with the vehicle off. we have a steady amount of background noise. in retrospect i should have calibrated the preamp/mic combination again to eliminate as much of this noise as possible.
next is a 0-bit track with head unit on max volume. this also helped verify no noise was in the system. notice it is not greater than the reference above
50Hz tone
150Hz tone
1kHz tone
4kHz tone
correlated pink noise
100Hz low pass pink noise
the above told me that the single low pass crossover on the amp is not sufficient, we need a much sharper slope. granted, this is not a system for a critical hear. the owner has permanent hearing damage and cannot hear much above 4kHz in one ear and not much above 8kHz in the other. as such, our goal is something that is pleasant to listen to and gets loud enough that he can enjoy it.
Edited by keep_hope_alive (04/05/09 06:25 PM)
Edit Reason: typo
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#1625242 - 04/05/09 12:52 PM
Re: 2002 Tundra Access Cab - ID, Ultra, MTX
[Re: keep_hope_alive]
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highend64
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Registered: 11/04/00
Posts: 1867
Loc: CA
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Very nice. I think the fourth pic of the graph is a 150 hz tone not a 400 hz.
_________________________
88 Honda Accord
Alpine
CDM-9803
JBL P80.2 main amp
Alpine SPS-500 front speakers
Atomic AT-1500.1D sub amp
Diamond Audio 10" D3v1 in a 1.25 cu.ft. ported box
tuned to 33hz.
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#1625338 - 04/05/09 06:27 PM
Re: 2002 Tundra Access Cab - ID, Ultra, MTX
[Re: highend64]
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keep_hope_alive
in another life, i'm a serial killer
SD I Power Bombed the Undertaker
Registered: 04/24/07
Posts: 13370
Loc: Quad Cities, IL
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yep, fixed. thanks.
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#1625346 - 04/05/09 06:45 PM
Re: 2002 Tundra Access Cab - ID, Ultra, MTX
[Re: keep_hope_alive]
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highend64
Member
Registered: 11/04/00
Posts: 1867
Loc: CA
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What mic did you use for your measurements? Also on the last graph, is that a 6 dB per octave slope?
_________________________
88 Honda Accord
Alpine
CDM-9803
JBL P80.2 main amp
Alpine SPS-500 front speakers
Atomic AT-1500.1D sub amp
Diamond Audio 10" D3v1 in a 1.25 cu.ft. ported box
tuned to 33hz.
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#1625394 - 04/05/09 09:45 PM
Re: 2002 Tundra Access Cab - ID, Ultra, MTX
[Re: highend64]
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keep_hope_alive
in another life, i'm a serial killer
SD I Power Bombed the Undertaker
Registered: 04/24/07
Posts: 13370
Loc: Quad Cities, IL
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Behringer ECM8000 mic
Rolls preamp
Creative Soundcard
Laptop
TrueRTA
it is a 12db/octave slope (roughly). i need to increase that slope.
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#1625399 - 04/05/09 09:55 PM
Re: 2002 Tundra Access Cab - ID, Ultra, MTX
[Re: keep_hope_alive]
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highend64
Member
Registered: 11/04/00
Posts: 1867
Loc: CA
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Where did you place the mic for your measurements?
_________________________
88 Honda Accord
Alpine
CDM-9803
JBL P80.2 main amp
Alpine SPS-500 front speakers
Atomic AT-1500.1D sub amp
Diamond Audio 10" D3v1 in a 1.25 cu.ft. ported box
tuned to 33hz.
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#1625430 - 04/06/09 03:58 AM
Re: 2002 Tundra Access Cab - ID, Ultra, MTX
[Re: highend64]
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keep_hope_alive
in another life, i'm a serial killer
SD I Power Bombed the Undertaker
Registered: 04/24/07
Posts: 13370
Loc: Quad Cities, IL
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just about head level at the drivers seat - i used the head rest to hold the mic in place. the mic is long, so the tip was about 6" from the head rest.
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#1626151 - 04/07/09 12:03 PM
Re: 2002 Tundra Access Cab - ID, Ultra, MTX
[Re: keep_hope_alive]
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SuperJay
I made this!!
Spammaster General
Registered: 08/30/07
Posts: 41602
Loc: SoCal
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nice work, Rich. You're going to have to share your little secret with me. I'm big on clandestine installs, and security installs... I'll share some of my secrets with you.
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