oh well you win your words are bigger..i knew from your first response ,this was gonna turn into a pissing contest,O.P listen to this guy,he knows by far infinitely more then i could pull up on the net in 5 yrs, I just make claims...

 

We can do all the wishful thinking we want, but that won't change our working constraints. This forum exists so that Evo owners can enjoy music in their cars. The regulars here try to make that happen by dispensing advice based on a given level of knowledge and experience, all geared for this specific automobile. Telling folks something that has little chance of happening in our environment helps no one. Good luck.

 

So..i guess what your saying is because i don't post *****,I'm not a regular. (check both our join dates)
the "Simple Truth" of it is it i wanted a car that had little to no roadnoise i would of bought a cadillac..
your fancy words will never persuade me to think that an SSL package system provides the same lvl of quality sound at 80 mph that a nice set of components will,SORRY

Last but not least,i said get aftermarket system,but you say this has little chance of happening.is this to say you know what his income is too...next your gonna tell me your an eardoctor...lol FJF M.D

 

You're not a regular poster on this forum. The audio one, I mean. No offense; it's the truth.

Same here. That's why we have to work with our environment. We have very loud cars that emit inordinate amounts of low frequency energy, among everything else. Worse, the center frequency (if you will) is random, so there's no way to tune out the effect, unless one is working in a static state. Add an exhaust, intake, cams, more displacement, and/or any number of performance enhancements and the means of achieving a degree of sound quality become exponentially more difficult. Again, this, when the car is moving.

I never said such a thing, but I did say that sealed/deadened doors, an upgraded HU coupled with a good amplifier can make the stock speakers perform at the same level, if not better in many respects, than quite a few aftermarket alternatives (when the car is at speed). Guess how I know?

You lost me here.

Edit: Forgive me; I'm not the brightest guy around and the intent of the comment finally hit home.

Let's make a few generous, working assumptions that represent a typical Evo audio environment:

Speaker sensitivity - 90dB @ 1w/1m
Amplifier - 100wpc
Source material - MP3
Car - tuned CT9A

Let's assume the impossible, solely for the sake of the discussion, and say that the amplifier is throwing a continuous 100wpc into the speakers without frying either, and that an average MP3 sees ~20dB of dynamic range. Sounds OK so far? This would give us an average sound level of ~110dB. My own Evo with minimal mods and an exhaust with a HFC known to be fairly quiet (Works) sees ~ 100dB at highway speed, C-weighted. This gives us 10dB above the noise level with 20dB of dynamic range in the source martial. Dynamic range is the difference between the loudest and the softest sound. Meaning, for all intents and purposes, the detail one pays for in fine speakers is lost under the noise floor.

 

you see thats what happens when you make vague statements,i have to assume your intent,and yes the human ears audible range is 0db-120db(20hz-20khz)w/o causing damage
but who here carrys a db meter in there cars at all time and says oh better stop increasing the volume or i'll hurt my ears.so getting past this crap,what was your original advice for O.P...not to buy a stereo,because its cost far outway its bene's?

on a side note,i also rarely use mp3,i stick to cda or dvda,but then again quality matters to me,just not a fan of compressed music

 

I have absolutely no idea what you're trying to convey. In case you're referring to the numbers, they're there to illustrate the nature of our environment.

My original advice was to check and see if the sub was working. If you have an issue with something I wrote, please quote me verbatim. I don't even know why we're here at this point.

<sigh> The example of MP3s was used for 2 reasons. One, it represents the bulk of the source material used by folks who visit this forum. Two, compressed music makes YOUR case batter. In case you didn't notice, I went to some lengths to skew the numbers in your favor.

I tried. Best of luck to you.

 

were here at this point,because in your 30 years of audio work,you feel your infinitely smarter then me in this field,and instead of simply disagreeing with me
you choose to attack me ..mainly my "knowledge and experience"on aftermarket equipment and this car...and from seeing from other posts you write to ppl who chime in on these forums,nothing has changed with you....Ignorance is Bliss

best of luck to you as well

 

You know nothing about audio and I do. It's that simple. I tried explaining our constraints, and I even illustrated them mathematically to absolutely no avail. I'm sorry you feel insulted. It doesn't seem like you're a native English speaker and perhaps there's a language barrier to consider.

 

so instead of letting it die you insult me again..listen bud one day your presumptions are gonna get you into trouble.and the fact that i was able to do something with my 4 evo's that you were not able to do...being am audio god that you are...doesnt help your" im smarter than you" arguement...lol

 

i know + means positive terminal -means negative terminal.isnt that something about car audio??

 

Wow, I leave this thread for 2 days and it turns crazy haha. Ok, this may not be in order but I have a few things to say here.

I'm not entirely sure that you weren't trying to be fececious here, but I will say that I've been installing car audio for over 10 years now and I've done everything from your daily driven civics to a 500hp 3000gt vr-4. Granted that doesn't account for my lack of experience with the evos. Especially ones that are that are powerful enough to be fueled on CT9A. I might suggest higher frequency coaxials in the rear and components in the front while keeping the tweeters at a higher level closer to the roof.

Like I said, I had a bit to say it's not necessarily in any particular order. I am going to have to disagree that JL and Alpine are "higher end speakers" Just because they are more expensive than the rest, doesn't mean they are higher quality. As a matter of fact, I hate both companies. Alpines amps are pretty good but their speakers leave something to be desired. JL has some decent speakers, but their amps are the crappiest amps I have ever had the displeasure of working with. I run full MTX setups in every car I have ever owned (yes I'm partial) but I have never had a JL or Alpine system out do mine. I'm not trying to bash you, as sound is all subjective to the listener.

I wrote a very extensive thread, that got stickied by the way, on my 370 forum about sound dampening/deadening. In defense of slowwevo, Once you add so much weight to your car that the noise cancellation is no longer a benefit, but a hinderence to power, then it's become a waste of time and effort.

On the other hand I don't think slowwevo really understands the purpose. You are right FJF. It's to cancel the vibration that additional sounds from outside add to the interior of the car. The frequencies that surround the panels (sound outside and sound inside sandwich the panels) causes vibrations. Sound dampening will help to lower vibrations and delete road noise versus interior audio frequencies. At the point that you have reached FJF, I think it may be a lost cause for you. For the OP though, some higher end speakers, HU and amps with the proper sound dampening (all four corners, firewall, floor from trunk to firewall) would be his best bet. Granted with the type of system and install that ALL OF US are talking about, we still haven't covered the minimum 2 grand price tag haha.

 

My comment wasn't made in jest; I was totally serious.

It's not a matter of what kind of speakers go where. We're dealing with a very high noise floor and no real way to cut through it, outside of trying to overpower the car. Not a great way to go. To add to the fun, the peaks in the noise floor are random, so there's no way to tune the system around them. As such, adding power isn't going to do anything, except produce sound just as bad albeit at higher amplitude with more distortion. Great, huh? The other option is to work with the car's acoustics and its environment. That's what we're trying to do.

As for rear speakers, why even go there when music is recorded in stereo. Stereo means two channels culminating in a 3-dimensional image. This cannot happen with 2 pairs of transducers scattered around the cabin. You see, I'm an audio guy not a car audio guy. From a purely audio perspective, and I certainly mean no offense to anyone, principles dominating car audio are based on a fairly tales and a desire to churn gear in very large quantities. Actual good sound doesn't figure into it at all. There's more to audio than turning knobs and dropping woofers into boxes, which is the general extent of this market segment. I think that if we apply some knowledge, experience, and actual audio expertise to the situation, we may be able to arrive at a better solution.

FWIW, as for my own car, the doors were sealed and deadened adding ~2-3lbs of weight.

I don't want to be misunderstood, so I'll just refer you to Don's site:

www.sounddeadenershowdown.com

 

now see GrnEVO disagreed with me but didnt have to get nasty..is this really so hard to conceive,and FWIW,i completely understand exactly what the benes and drawbacks of sound deadening materials are,and exactly what they do for you in audio applications,but this turned into something of a debate on this subject when i dont remember anyone disagreeing with what sound deadening material actually did.I've been using this material in a variety of app's not just car audio,for many years now

 

oh and another FWIW,i was just using jl and alpine as examples,ive had great luck with alpine F1 stuff in the past along with xr series jl stuff..or getting a little more old school mb quart or boston acoustics used to make quality pieces as well,but like you said GrnEVO everyone has there preference,and no you dont have to throw big bucks on the big names to get results

 

i am sorry FJF they came out with this thing called DVDaudio,and from what i remember this is digital not analog(stereo)..it can be but usually isnt,but heres a quote straight from wiki

DVD-Audio offers many possible configurations of audio channels, ranging from single-channel mono to 5.1-channel surround sound, at various sampling frequencies and sample rates.

yes FJF some ppl do actually listen to 5.1 audio in thier cars