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2007 Avalanche (Notbagd) Stereo Install Sundown w BC2K


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My son was down visiting over Christmas break and helped me install my small stereo setup. My original plans were to just install a small setup with maybe a couple of 8's under my back seat but of course it quickly grew to 2 - SA-12 D4s after being on this forum. My main goal was to keep the midgate somewhat functional so I could still use my bed if need be.

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Pic of the goods. Merry Christmas to me. :)

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Some of the initial wiring and adapters for the head unit. (PAC OS-4 and Axxes SWI) Dang what happened to the days of like 5 wires and a set of RCA's

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Stock head unit removed and ready to install the new Clarion, decided to go with this head unit because I think having a knob is necessary with the kids. Just old school I guess.

DSCN1234_zps22eb03aa.jpg Head unit installed and powered up, man putting that thing in was like trying to put 10lbs. of sh** in a 5lb. bag. I would have liked to see the deck sit a little more flush but I guess I can't complain since the install kit was free. (Scosche kit)

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Stock midgate

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Initial MDF midgate fitment

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3/4 MDF box started. 20 degree taper so the box/midgate assembly can be folded down.

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Port was a little tricky. Overall it is 4.25" x 25", one bend at 10" and a wedge installed where the 2 ports meet in the middle.

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Box done and mounted to the midgate. Future plans are to fiberglass the front and wrap in beige vinyl.

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Undercoating the back of the box.

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Box folded forward like the stock midgate

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Another shot of the box/midgate folded forward. It doesn't fold down completely but enough to give me some more bed space. I have only actually folded the midgate down maybe a handful of time since I bought the truck in 2007.

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Box/midgate folded up and latched in place with the stock latches.

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Welded up an amp rack that will sit under the back seat. It will just hold the BC2000 for now I made it to also hold a C1100.4 in the future.

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Amp rack and BC2000 installed.

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Used 2 AWG CCA and 150A circuit breaker for now since it is just the one amp. Measured 14.88 V with truck running and only 14.6 V with "normal" music turned almost full volume so not too bad. Dropped to ~12.0 V with 40Hz signal and full volume but I don't listen to that on a regular basis so... Gain was set with my son's DD-1 he won last month. (Orangjuiced) Will upgrade the breaker and use 1/0 pure copper wire when I get the mid/high amp.

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Welded a tab on the stock bracket for the 150A breaker. Almost looks factory. :)

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Installed the SiriusXM tuner a few days later.

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Also installed the bass knob and toggle switch for the video bypass since the relay I tried didn't work. Seems like the headunit is looking for a small delay before seeing the ground signal. Oh well not a big deal.

Final thoughts and comments:

I just wanted a "small" daily setup that would sound good and not an SPL monster as I am old and already hard of hearing. The box sounds really good with all kinds of music and especially rap.(1.65 cu. ft. per speaker after all displacements tuned to ~36 Hz) The box came to life with a 40Hz signal from the SMD disc for the DD-1. :) I eventually plan to install aftermarket mids and highs along with a C1100.4 but for now I am pleasantly surprised how good the stock speakers sound with the headunit power. They keep up with the bass no problem unless I throw in an old school bass cd.

The PAC chime module noise is a little annoying when using the turn signal so I just turn the stereo up. It also has acted up a little with stock back up sensors. Sometimes the DIC says my park assist is disabled even though my tailgate is up. If I turn the vehicle off/on then it is all good??? Never had an issue prior to the install??

Feel free to hit me up with any questions and a special thanks to my son and my brother for helping me out and keeping me motivated to finish.

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I know exactly what you mean with the PAC OS-4...10lbs of shit in a 5lb bag! had to do it in my Tahoe and sierra. box looks good!

Thanks man

Nice work. :D

Thank you

killer box and amp rack man

Thank you, it took a little extra time but worth it in the end
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Box looks great. What did you use to undercoat the back

2004 Escalade Ext

Pioneer avh8400

Kicker ix500.4

Kicker ix1000.1

Kicker hyperflex 0+4 awg

Sundown X-15

Sundown Sa-6.5c x2

KnuKonceptz 4 channel Rca

Rockford Fosgate 2 channel Rca

SkyHighCarAudio 14awg speaker wire

Build Log

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This is awesome man! Great build! I like the faceplate of the box :)

2007 M/T Honda Civic Coupe EX

(4) Sundown Audio X-8's

(2) Ampere Audio 3800.1's

(3) Stinger SPV-44 Batteries

(1) Mechman 240

3:1 Ratio 4th order sealed from the trunk

TEAM NWSPL

Best termlab scores to date in Honda trunk:
151.7db legal (official) IASCA trunk 3 class

Best termlab scores to date in my walled Subie:
152.9db legal (unofficial) IASCA advanced 2 class
155db outlaw

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Box looks great. What did you use to undercoat the back

Thanks. I just used some mid grade paintable rattle can undercoat from the local auto body shop. ($7 a can) It is the kind that gets hard when cured not the kind that stays soft forever.

This is awesome man! Great build! I like the faceplate of the box :)

Thanks man, I tried to keep it somewhat simple yet clean. Like I said I plan on finishing the faceplate with fiberglass and vinyl... someday.
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