tuning from subs-midbass-midrange-highs.

[The Camry]

Ok so lets test my knowledge here. Letting slopes fill in the hertz gaps.

sundown sa-12 32hz ported. LP-90

Take two 8''s and either make a custom box out of the back deck or put them in the back doors. HP them from 120- LP- 500hz

midrange hertz hi energy. HP-550 LP-5k.

Tweeters hp 5k.

Now inform me if im anywhere close to having a good plan or if im just an idiot here.

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[Jepalan]

Ok so lets test my knowledge here. Letting slopes fill in the hertz gaps.
sundown sa-12 32hz ported. LP-90

Take two 8''s and either make a custom box out of the back deck or put them in the back doors. HP them from 120- LP- 500hz

midrange hertz hi energy. HP-550 LP-5k.

Tweeters hp 5k.

Now inform me if im anywhere close to having a good plan or if im just an idiot here.

So, it sounds like you are trying to create a blended 4-way system - correct?

Your gaps seem a little too big for a starting point. Remember the LP & HP filters will already by 3 or 6 dB down at the set point.

What slopes are you using for the HP and LP filters? And what fitler types (butterworth, linkwitz-riley?)

 

[Jepalan]

Just to add a little more flavor to my response above:

The goal is to get a smooth response *at your ears*. This is a combination of the electrical response of the HP/LP filters plus the acoustic response of the speakers plus the sum of reflective energy that makes it to your ears (which is specific to your car cabin and install positioning).

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I usually start by setting the LP and HP crossover points to the same freq (no gap) and at points appropriate for my specific drivers.

Then I use an RTA with mic located at the listening position and look for peaks or dips *at the crossover points*.

I then adjust the crossover gaps as needed to smooth the RTA response at those points.

Then I move on to full system tuning.

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When choosing the initial cross points it helps to have plots of the near-field response of your drivers - and even better if the data includes on-axis and off-axis plots. This way you can position the cross points to avoid natural resonance in your particular drivers as well as minimize beaming. In general I try to cross my tweets as low as they will go to optimize imaging - but that means a steep slope HP filter is needed to protect them from low freqs at high volume.

 

[blazian87 10+ year member]

I feel like LP 90 is a little high considering that you want to have dedicated midbass. You're gonna have a gap of missing information between the sub and midbass. You should take advantage of the fact that you have more speakers to blend in with and try to reach farther down with your mids. Since you're porting the sub to 32hz, try putting the lpf to 80 or lower if you like. Then HP the 8" mids to around 80 or as low as they could handle. Depending on if there's a peak or not between each speaker, you might have to overlap or underlap your crossovers to make it sound more natural. EQ where necessary. There are no universal numbers that you can just plug in to get the best sound. It's all subjective so I suggest you spend some time in your car once you get it all setup to listen to the differences and go from there.