Quote:
Originally Posted by speedfreak28
The problem with using the 13 band EQ through a passive filter ( Im assuming an eqx or something similar is that you are not adjusting the characteristics of the individual speaker but the whole passive network. this makes it really difficult to accurately tame peaks in an individual speaker because you will change the characteristics of the other as well. Heck, phase can change with frequency as it comes off a speaker. Also what may sound flat to you and imaged dead on may not be the same on an RTA. Realistically unless its a competition vehicle whatever sounds good to you should be your ultimate goal. SQ is subjective, measured SQ is not
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I had to heavily paraphrase to keep it from being a book but I will touch on your notes.
What i first was trying to say is I did not change the slope of the crossovers. Also Phase and slope only directly affect each other in simple passive crossovers without phase compensation. Any decent passive crossover will have phase compensation. In my Focal crossovers they compensated for that shift so I had to alter them.
Also since I have my own software I calculate time alignment by distance between tweeter and mid woofer becasue its a more stable constant since once the drivers are installed they will never move.
A Zobel network is already designed into the Focal passive crossovers because the Focal tweeters are actually 8 ohm and the woofer is 4 ohm. I altered the values in an attempt to undue the phase compensation that was designed into the crossover which put me exactly where I wanted to be at 270 degrees off-axis.
I left the mid woofers as they were (off-axis) as I only needed to alter the tweeters in my installation. I did this to keep it less complicated becasue I knew I could use my eq to blend them.
I wasnt using the EQX to tame individual speakers but to tame the peaks at each octave. I also first tune the system by my ear as what sounds best to me. I then record my settings as my reference point. If and when I have my car RTA'd for competition I can record those settings as a competition reference point so I can go back in forth. Perfectly flat is not always ideal for all music for everyday listening at least for my tastes.
Remember, there are a hundred ways to skin a cat. What I did made a big improvement and greatly enhanced my imaging and overal tonality of the system. If I could have in hindsight I would have used the 3-way Focal poly kev set and had even more improvement. I wanted to keep the stock appearence and that would have been nearly impossible.