Stereo Install Pictures--Not done yet - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

ppiamp · 05-17-2011, 03:02 PM

Hi,

I am in the middle of the process of the install.
Currently using:
Alpine Imprint Processor
Alpine PDX 4.150 Front Stage Bi Amp/Wired
Alpine PDX 4.100 Rear Stage (only for back up beeper)
Alpine PDX 1.1000
JL Audio Two 12W3v3
Boston SPZ 60's
40 farad cap
600 cca battery
monstercable and zero noise cables.

Will be using a false floor so you will not see any of the equipement.

I am tuning the Sub box and deciding if I want to point the sub forwards or not. I have heard there are pro's and con's to both. I am about 85% happy with the subs now....There is a resonance Fs at about 80 to 100Hz I am trying to deal with. If a track hit this hard it will make the make the trunk vibrate like a tuning fork.....Yes, 70sqft. of dynamat

I think the issue is the trunk itself is blocking the wave, a box inside a box. I am not sure if the front aiming box would correct this, but JL audio's 1300.00 stealth box does the same thing...and those guys try everything before releasing an item....Can anyone chime in here?

The car also has a midrange peak at about 3db @1 to 2k hz. I used the imprint to get rid of it but dealing with that is a must for balenced sound.

Also, If you use use the stock tweeter pods you need to be 2db down at least/and or Time delay them seperately.

Getting through the door with wires is a real pain, but worth it as the stock wire has tweeter wires and other things on the line in parallel...I tried with the stock wire and it didn't cut if for SQ...they were quite noisy IMO.

I want to thank Steve@******** and Topdown for all the advice.

Iwantone2 · 05-17-2011, 03:36 PM

This looks promising...

Topdown · 05-17-2011, 03:44 PM

looking good so far!

should sound great. that peakiness is what I was fighting with as well... I also ended up dropping my tweeters about -3db and man aged to EQ'd out most of the peakiness.

looks like you got into the doors nice and tidy/clean, I like it... cant wait to see it all done.

ppiamp · 05-17-2011, 04:08 PM

Thanks guys,
I will post Imprint graphs of the final Fs sweeps, I am still tuning the sub box down before I commit to the final false floor. Front stage is 95%

, bass box is 85%. Any ideas on the how to tune that sub box? I seem to be fighting it...
My other idea is a deathbox bandpass, with a small 5 channel amp. This will allow my to get rid of my battery and cap...Topdown, What do you think?

=Stephens= · 05-17-2011, 06:19 PM

are you hooking this up to your stock radio?

ppiamp · 05-17-2011, 06:33 PM

Yes, Stock radio directly into the Alpine Imprint processor, which controls TA, eq and xovers and gain

ppiamp · 05-17-2011, 06:39 PM

Topdown,

My midrange peak is a lower Fs in the mid....the boston xover is at 3K so a tweeter adjustment will not get it for me....you might look into it. The Imprint found it every time.

USNSCPO · 05-17-2011, 07:10 PM

Quote:

Originally Posted by ppiamp

Thanks guys,
I will post Imprint graphs of the final Fs sweeps, I am still getting the sub box down before I commit to the final false floor. Front stage is 95%

, bass box is 85%. Any ideas on the how to tune that sub box? I seem to be fighting it...
My other idea is a deathbox bandpass, with a small 5 channel amp. This will allow my to get rid of my battery and cap...Topdown, What do you think?

Lets have some details on your enclosure. Sealed, ported, 4th or 6th order bandpass? Total volume without drivers? one shared airspace, or one per driver? Does the peak shift if you drop the rear seat? Then I can grab the driver specs from JL, and run some numbers for ya.

You describe a huge 80hz peak makes which makes me think its an alignment issue as opposed to sub placement. Placement would affect cabin gain. Typical cabin gain doesn't start to manifest (to the ear) until about 65hz rising to 40ish hz, the falling off. Oh, and if you think you have peak now, the DECWARE deathbox will really pound, and is adjustable, as you know... but it isn't a real good SQ solution since its a 4th order BP. It has some odd phase characteristics.

=Stephens= · 05-17-2011, 07:17 PM

What does the Imprint do for your system?

2010SLVRBULIT · 05-17-2011, 07:31 PM

front facing subs will yield less impact(muffled by the back seat), face them towards the rear and allow the reflected bass wave to get into the cabin somehow(remove the 6x9s?), theory of 'cornerloading'.

greenmachinedriver · 05-17-2011, 07:32 PM

wow, ive put together a few systems before but you guys are way over my head. kudos to the audiophiles.

Topdown · 05-17-2011, 10:11 PM

Quote:

Originally Posted by ppiamp

Thanks guys,
I will post Imprint graphs of the final Fs sweeps, I am still getting the sub box down before I commit to the final false floor. Front stage is 95%

, bass box is 85%. Any ideas on the how to tune that sub box? I seem to be fighting it...
My other idea is a deathbox bandpass, with a small 5 channel amp. This will allow my to get rid of my battery and cap...Topdown, What do you think?

There really isnt much tuning you can do to the sub, one of the drawbacks to a sealed enclosure, but try playing with the sub phase and crossover point/slopes. In my install with a class-d sub amp, I had to cross over higher than normal with a sharp roll-off to blend with my mids with a less aggressive roll. 100hz on my subs and 80 on my mids, with my subs firing out of phase with my mids, then I EQ'd a small hump in my mids at 40hz, which is well below the cutoff, but it brought the bass forward into the cab instead of just a pounding from the trunk.

then I EQ'd the peak around 80hz out of the subs and actually used a small (2db or so) bass boost at 35hz to make it reach 25hz with some authority. normally I really dislike bass boost, but without a processor and only limited EQ functionality, I am doing what I can with what I've got.

needless to say, tuning this car has been fun, but definitely a challenge... now if I could just leave it the hell alone I would be in great shape.

Topdown · 05-17-2011, 10:15 PM

Quote:

Originally Posted by 2010SLVRBULIT

front facing subs will yield less impact(muffled by the back seat), face them towards the rear and allow the reflected bass wave to get into the cabin somehow(remove the 6x9s?), theory of 'cornerloading'.

his subs are rear-facing... and I agree, I think removing the 6x9 will help with the "stangled bass" effect that you'r likely running into.

Edscapade · 05-17-2011, 10:16 PM

Nice work - Thanks for sharing. Keep the pictures coming.

05-17-2011, 03:02 PM	#1
ppiamp Drives: 2018 Camaro 2SS Auto Hyper Blue Join Date: Apr 2011 Location: Florida Posts: 97	Stereo Install Pictures--Not done yet Hi, I am in the middle of the process of the install. Currently using: Alpine Imprint Processor Alpine PDX 4.150 Front Stage Bi Amp/Wired Alpine PDX 4.100 Rear Stage (only for back up beeper) Alpine PDX 1.1000 JL Audio Two 12W3v3 Boston SPZ 60's 40 farad cap 600 cca battery monstercable and zero noise cables. Will be using a false floor so you will not see any of the equipement. I am tuning the Sub box and deciding if I want to point the sub forwards or not. I have heard there are pro's and con's to both. I am about 85% happy with the subs now....There is a resonance Fs at about 80 to 100Hz I am trying to deal with. If a track hit this hard it will make the make the trunk vibrate like a tuning fork.....Yes, 70sqft. of dynamat I think the issue is the trunk itself is blocking the wave, a box inside a box. I am not sure if the front aiming box would correct this, but JL audio's 1300.00 stealth box does the same thing...and those guys try everything before releasing an item....Can anyone chime in here? The car also has a midrange peak at about 3db @1 to 2k hz. I used the imprint to get rid of it but dealing with that is a must for balenced sound. Also, If you use use the stock tweeter pods you need to be 2db down at least/and or Time delay them seperately. Getting through the door with wires is a real pain, but worth it as the stock wire has tweeter wires and other things on the line in parallel...I tried with the stock wire and it didn't cut if for SQ...they were quite noisy IMO. I want to thank Steve@******** and Topdown for all the advice. Attached Images Last edited by ppiamp; 05-17-2011 at 11:20 PM.

05-17-2011, 03:36 PM	#2
Iwantone2 Voice Of The Voiceless Drives: CGM 1SS RS Join Date: Feb 2009 Location: OC Cali Posts: 9,617 View My Garage	This looks promising... __________________

05-17-2011, 03:44 PM	#3
Topdown The wait is over! Drives: 2010 Camaro, IOM, L99, Auto Join Date: Mar 2010 Location: Washington Posts: 1,081	looking good so far! should sound great. that peakiness is what I was fighting with as well... I also ended up dropping my tweeters about -3db and man aged to EQ'd out most of the peakiness. looks like you got into the doors nice and tidy/clean, I like it... cant wait to see it all done. __________________ Ordered - 4/17/2010 Delivered - 5/29/2010 AlphaDamp CLD Mat - Get more Sound Deadening with less Sound Deadener

05-17-2011, 04:08 PM	#4
ppiamp Drives: 2018 Camaro 2SS Auto Hyper Blue Join Date: Apr 2011 Location: Florida Posts: 97	Thanks guys, I will post Imprint graphs of the final Fs sweeps, I am still tuning the sub box down before I commit to the final false floor. Front stage is 95% , bass box is 85%. Any ideas on the how to tune that sub box? I seem to be fighting it... My other idea is a deathbox bandpass, with a small 5 channel amp. This will allow my to get rid of my battery and cap...Topdown, What do you think? Last edited by ppiamp; 05-17-2011 at 11:22 PM.

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05-17-2011, 06:19 PM	#5
=Stephens= Drives: 2011 LS Join Date: Feb 2011 Location: Kearney, Nebraska Posts: 3,541 View My Garage	are you hooking this up to your stock radio?

05-17-2011, 06:33 PM	#6
ppiamp Drives: 2018 Camaro 2SS Auto Hyper Blue Join Date: Apr 2011 Location: Florida Posts: 97	Yes, Stock radio directly into the Alpine Imprint processor, which controls TA, eq and xovers and gain

05-17-2011, 06:39 PM	#7
ppiamp Drives: 2018 Camaro 2SS Auto Hyper Blue Join Date: Apr 2011 Location: Florida Posts: 97	Topdown, My midrange peak is a lower Fs in the mid....the boston xover is at 3K so a tweeter adjustment will not get it for me....you might look into it. The Imprint found it every time.

05-17-2011, 07:17 PM	#9
=Stephens= Drives: 2011 LS Join Date: Feb 2011 Location: Kearney, Nebraska Posts: 3,541 View My Garage	What does the Imprint do for your system?

05-17-2011, 07:31 PM	#10
2010SLVRBULIT Drives: G5(LLT) & C6(LS3) Join Date: Apr 2009 Location: MARS Posts: 7,527 View My Garage	front facing subs will yield less impact(muffled by the back seat), face them towards the rear and allow the reflected bass wave to get into the cabin somehow(remove the 6x9s?), theory of 'cornerloading'.

05-17-2011, 07:32 PM	#11
greenmachinedriver Drives: white 2010 ss and 2011 6.2 silvy Join Date: Jan 2011 Location: dfw Posts: 316	wow, ive put together a few systems before but you guys are way over my head. kudos to the audiophiles.

05-17-2011, 10:16 PM	#14
Edscapade Edscapade Drives: 2011 SS Camaro Join Date: Jul 2010 Location: Pocatello Idaho Posts: 442	Nice work - Thanks for sharing. Keep the pictures coming.