Optimum front stage w/ I pillar pods

[doodlo]

Help me out here guy's I want sweet SQ w/ a great front image. I want to hunt down some nice 3-ways for an MB Quart Q4.150 amp I have for The front stage in a Lexus RX330. The stock door spks. are 6x9's, I'll replace those with something later or just disconnect. What I want to do (I think) is set up my 3-ways (Focal or something nice) with my tweets and 4" mids in I pillar pods angled at 30-45 degrees from the listener. In other words, they'll be aimed toward the center of the car. Then put the 6.5's in kick panel pods. Has anyone heard installs like this? I'm trying to create an optimum front stage. Is there an issue with the 4" mids producing harshness being that close to the listener. If that's the case separate gain control? Here's a thought, along with the 6.5's in the kick panels running off of the other two channels a set of 5-1/4's w/ tweets. That would be a 6.5, 5-1/4 and tweet in the kick panel. May be a lot of bulk down there. Could there an issue with the 4" mids producing harshness being that close to the listener. If that's the case separate gain control?

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[Heeltoeclutch 10+ year member]

If you're going for pure SQ and not flashiness, it sounds like you're way overcomplicating it. If I'm understanding you correctly, you're intending to put triaxial speakers in the front?

If it were my install, I'd just get some really really good 6.5 comps and do a very good install. What you're saying is do midbass in kicks and tweets on pillars, along with mids and tri's on pillars?

I'd dump the tri's and spend the money on the 6.5's, then try the tweets in the kicks and on the pillars and see what you like better. In theory the tweeter should be as close to the midbass as possible... experiment and see what works for you. But why the triaxials?

 

[doodlo]

No mention of triaxials. I want 3-way 6.5 separates (comps) w/ 5-1/4 sep's for front. Out of the 6.5 set take the 4" speaker w/ tweet for the I pillar. The 6.5" speaker out of that set will go below with the full set of 5-1/4 seps. Maybe I'm making it complicated, ADHD kicks in now and then...sorry. I just think there's been times where I liked the sound out of 5-1/4's as much or more than 6/5's.

 

[All_Logix 10+ year member]

I agree it sounds a little complicated but here is my 2 cents for what its worth, I would make an adapter plate in the stock 6x9 location for a 6 1/2, the frequencies these reproduce generally are almost directionless. I didn't believed it until I sat in a car with them in the same location and for the life of me couldn't find them going off of where I thought the sound was coming from. If your die hard on the 3 way, you can try two things...kinda just have to try to know the best result, you can either angle the midbass in a kick pod and put the tweets in the pillar the same distance from your ears...or you can do both the mid and tweet in the pillar and run the mids off axis facing one another to help with that harshness...but I have never owned a lexus....so I can only guess

 

[dumple 5,000+ posts]

8 inch mid in the door and 4inch mid in a kic3k panel and tweets in the pillar or mirror sails??

 

[Bumpin' Goalie 10+ year member]

One of the easiest ways to achieve a proper 3-way could be midwoofer in the door, midrange and tweeter in a-pillar pods. Don't feel set on buying a pre-made 3-way kit either. Maybe look into some raw drivers on partsexpress and madisound just to see options. Nothing wrong with a pre-made though, such as Hertz HSK or MLK (just 2 quick examples).

 

[keep_hope_alive Premium Member]

the main issue with 4" in the a-pillar is PLD. they are so close that you'll need time alignment to delay them so your sound stage doesn't pull to the closest side.

harshness is the result of phase interference from specular reflections and diffraction.

midbass in the kick is difficult due to airspace. midbass in the door is easier.

midrange in the kick is nice due to minimal PLD. but you want time alignment between the kick mid and door midbass, and you're building a 1-seat car.

tweeters can set stage height, which is why they are commonly at ear level. but aiming is based on testing. each car is different.

some prefer to aim kick mids just behind the opposite passenger, near the b-pillar. some near the dome light. testing will determine which is best.

also note that "beaming" will determine at what point a driver will become highly directional. this is why smaller (4") midrange drivers are preferred in 3-way systems. you want your mid to have the widest frequency response possible.

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