dotsad wrote:I havent tested the sound yet. As mystically I drained my battery while I was installing two speakers ( I had nothing on while tinkering, wtf!?). Secondly and most importantly, the two doors that I did speakers install on, windows DONT go automatically up any more. I am not sure what I did to cause this.Windows go up if you hold the up/down switch, but don’t go up by themselves, but go down automatically. Very weird. I decided not to install the speakers on the driver’s side ( back and front ) until I can figure out why windows won’t go up anymore automatically.

From what I can tell, I connected all wires, windows do work, but it’s the strangest thing. Ohh well, someone unwrap the mystery, computer reset, kick the door etc?!

Regarding the install, it wasn’t that hard. If you know how to use a drill, pliers and can see colors ( to distinguish color of the +/- ) it is very doable.



Modified by dotsad at 2:24 PM 10/18/2009

07sportm35 wrote:
Backdoc7, I am going to order Infinti 62.9I off of ebay. They can be had for $65 shipped. What we need in our cars with the stock amplifiers are efficient 2 ohm speakers. The 62.9I's are at 95dB which is the best I have seen. Furthermore the frequency response goes down to 45Hz and they can handle 75 watts rms(overkill with the weak factory amp). The efficiency is key because you want to keep the volume as low as possible for a given SPL. Why? Because the factory amplifier will produce more distortion (mostly harmonic distortion) as it is pushed harder/higher volume.

Next I'm going to order tweeters. The Infiniti REF1031T's seem to fit the bill. They are 2ohms and have a lower frequency response than most tweeters (down to 2500Hz)(93dB efficient). My guess is factory tweeters go down pretty low because of the 2 inch size.

I will run everything without crossovers seeing as tho the Bose system takes care of the frequency distribution. The tweeters can be had for $50 shipped off of e-bay. Total cost is only $115 since I'm doing the job myself.

From what I can hear the factory tweeters produce some pretty good distortion at medium high volumes. It is important that the tweeters are able to take over where the 6.5's leave off in terms of frequency(I would guess 2KHz). That means they need to go as low as possible.

Without getting to technical I'm going to hook my system to a spectrum analyzer. That way I'll be able to see the frequency distribution between the 6.5's and the tweeters. I'll just unhook one or the other and see what happens on the analyzer. A spectrum analyzer allows you to "freeze" frequencys on a display and look at their individual amplitudes/power/SPL. It is kinda the opposite of a oscilloscope. Oscilloscopes freeze "time" and allow you to look at a wave form. The oscope is a "time" domain device, and the spectrum analyzer is a "frequency" domain device. Time and frequency have a interesting relationship. 1/frequency = time. I'm not trying to sound smart but I hope you find it as interesting as I do. I'll throughly explain it over a cup of java some day my friend.

pangpang77 wrote:dotsad,

Nice, you were more patient than I. Did you leave the tweeter setting at +3dB or did you switch it to 0?

Any update on the sound improvement?

rocastro71 wrote:How's the quality of the sound system now after the speaker change Pangpang and others that made the upgrade?

rocastro71 wrote:07sportm35, where did you order the 62.9I for $70/pair?

Backdoc7 wrote:O7, could you just pull an all nighter and get those babies installed? I'm good and ready for a sound report!! Seriously though, can't wait for the install/sound report.. I know it will probably come with a sound data sheet you'll have to explain to me, but that's cool!

07sportm35 wrote:
The tweeters came in today. You know I will give you the 411. No data sheets but graphs will be displayed. I'm working on a good microphone to go with the analyzer and then pictures. I'm going to capture the frequency response of our systems in graph form. Should be pretty cool.

Did you know a microphone is the opposite of a speaker?

rocastro71 wrote:Any update on the sound quality after the upgrade??

dotsad wrote:
he he, i replaced only my left side ( front and back) last weekend. Driving for a week in a half way setup 50% Bose / 50% Infiniti i CAN tell one thing for sure: My left ear hearts more than the right one. I eventually adjusted balance more to the right, as i felt like my left ear going to bleed soon. I guess my conclusion is that the Infiniti’s do produce more of "something", "something" be it sound, waves, etc. but i can feel it. Can’t wait till tomorrow to finish my right side, to get this over with

dotsad

rocastro71 wrote:Well, I myself is not happy with the stock bose speakers. I don't have the 14 speaker system but only the 8 speaker system. Although I already have an aftermarket subwoofer added with a 500w amplifier just for the woofer, I still feel that i could improve on both mids and highs. After reading this thread, I was down to choosing between infinity 6032si or infinity kappa 62.9s. However, I decided to get JBL p662s which is almost comparable to the 62.9s. Here's the link but I ordered my off ebay for less: http://www.sonicelectronix.com....html.

I am hoping to get it installed in a week or two and I'll report back the result.

07sportm35 wrote:
I wonder why you chose the JBL's over the Inifinit's? One thing that is HUGE, the Infiniti's come with the speaker brackets to easily adapt the speakers to your car. I'm not so sure the JBL's do.

Also, consider this, the Infinit's go down to 45Hz--but more importantly, they are extremely efficient and sensitive at 95dB. This means the weak amplifiers of the Bose system should have no problem driving them at relatively low distortion levels. The JBL's are still good at 93dB but know this...for every 3dB volume goes up by a factor of two!

My Infiniti 62.9I's should be here on the 27th.

pangpang77 wrote:
Even the 93dB should be sufficient. I noticed that my 6032si were more efficient than the factorys and I was able to have richer sound at lower volume.