[allwheelsdriven]

fwiw I tried several tunes in my F48 and the BMW-General-Setup-for-SUV tune sounds by far the best. Great imaging and vocals

No center channel speaker
Fronts: Focal Integration IFBMW-C
Subs: Focal underseat

[onur_sp]

is there any topic about audison amp tune's ? i would like to share my setup on audison 8.9 bit forza and focal es100k, audison apbmw woofers

[burro_blasta]

Question for anyone who shared a tune with a trunk sub:

I read through this entire thread and saved/loaded all the tunes for cars with a sub in the trunk. I was surprised to see all the crossover points have the underseat subs and door speakers playing at such a low frequency.

The tunes of course varied but most all of them had the trunk sub cutting off at 80, which I expected.

But I was surprised that many of the underseats only played up to 150, give or take, and many door speakers played as low as 150 or 120 or even 100.

I was digging through everything because I'm trying to figure out my own crossovers. Right now I have:

Trunk sub 0-80

Underseats 80-180

Doors/center/rears 180 and up

This makes a lot more sense to me - ie, why have the doors/center/rears play as low as 100 or 120 if the underseat subs can be doing all that work and free up the doors/center/rears to focus on the higher frequencies?

If anything, I had been wondering if I should have the underseats play up even higher - 200 or 220 - and raise the doors/center/rears accordingly. Seems these tunes are the opposite direction...

Hope that makes sense. I'm relatively new to this, would love to hear any other opinions.

[bytterga]

Originally Posted by burro_blasta

Question for anyone who shared a tune with a trunk sub:

I read through this entire thread and saved/loaded all the tunes for cars with a sub in the trunk. I was surprised to see all the crossover points have the underseat subs and door speakers playing at such a low frequency.

The tunes of course varied but most all of them had the trunk sub cutting off at 80, which I expected.

But I was surprised that many of the underseats only played up to 150, give or take, and many door speakers played as low as 150 or 120 or even 100.

I was digging through everything because I'm trying to figure out my own crossovers. Right now I have:

Trunk sub 0-80

Underseats 80-180

Doors/center/rears 180 and up

This makes a lot more sense to me - ie, why have the doors/center/rears play as low as 100 or 120 if the underseat subs can be doing all that work and free up the doors/center/rears to focus on the higher frequencies?

If anything, I had been wondering if I should have the underseats play up even higher - 200 or 220 - and raise the doors/center/rears accordingly. Seems these tunes are the opposite direction...

Hope that makes sense. I'm relatively new to this, would love to hear any other opinions.

I wonder about the same thing.
I got focal isub bmw 2 underseats and they got a frequency response from 35 - 250hz so since i dont have a trunksub i figurd i set them from 40hz up at least 150hz and start the rest of the speakers from 150hz and up.
See most files in here have the underseats crossed lower.

[Billfitz]

Originally Posted by burro_blasta

I was surprised that many of the underseats only played up to 150, give or take, and many door speakers played as low as 150 or 120 or even 100.

Since the under seats are under the seats they don't work very well above where the frequencies become directional, which is around 120Hz. That's why they cross over there to the doors. Technically 100Hz would be better, but four inch drivers don't work well enough to 100Hz to allow that. Ten inch under seats and five inch or 6.5 inch in the doors with a 100Hz crossover would work a lot better than eights and fours, but there's just not enough room for them.

[burro_blasta]

Originally Posted by Billfitz

Since the under seats are under the seats they don't work very well above where the frequencies become directional, which is around 120Hz. That's why they cross over there to the doors. Technically 100Hz would be better, but four inch drivers don't work well enough to 100Hz to allow that. Ten inch under seats and five inch or 6.5 inch in the doors with a 100Hz crossover would work a lot better than eights and fours, but there's just not enough room for them.

That's an interesting concept. I wonder how much of a tradeoff there is along the way - eg, as you lower the cutoff you get more "directional" sound from your doors but you're also making them work harder to handle the lower frequencies, so maybe the sweet spot is somewhere between 120-180. Will have to play around a bit with this...

[Billfitz]

Home theater and home hi-fi has been using a crossover of 80 to 100Hz for over 20 years. Home speakers are a bit different, because the subs are usually located well away from the mains, or at least they should be, and that requires that they don't have directionally locatable content. In a car that's not a real issue, but the attenuation of midbass when the woofers are under the seats is. Below 120Hz bodies and seat cushions are acoustically invisible, those longer wavelengths just go around them, but above 120Hz they get damped pretty well. As for reducing excursion of the mids with a higher crossover, you'd have to take them to 200Hz for it to be significant. Ideally BMW would have used larger midranges, but eight inch woofers wouldn't have been able to keep up with them, and while you might shoe horn fives or even six and a halfs into the doors there's no way they could fit large enough enclosures under the seats to fit tens.

[bytterga]

Question:
The soundfile that comes from audiotec fischer for the f34 has the underseat speakers in reversed polarity. Is there a reason for this?

[Billfitz]

You'd do that if the phase responses of the woofers and mids at and/or near the crossover frequency sum to 180 degrees apart. That's to be expected using 2nd order/2nd order passive crossovers, but since there is no passive crossover between the woofers and mids I can't see the reason for it. Only Audiotec-Fischer could say why they do that.

[Onizukachan]

Installed my match up7 Bmw this evening in the f31, and loaded the limousine file… ok.
Loaded the touring file, much better!

So far pleased with purchase.

Have some earthquakes coming so won’t do any tuning until then.

[quakerroatmeal]

Originally Posted by Onizukachan

Installed my match up7 Bmw this evening in the f31, and loaded the limousine file… ok.
Loaded the touring file, much better!

So far pleased with purchase.

Have some earthquakes coming so won’t do any tuning until then.

What was the difference that you noticed between the two tunes?

[Onizukachan]

The limousine is flatter sounding, is the best I can describe it. Less dynamic. Might actually turn out to be more correct but I like the touring file better for now.

Toggling between the two I noted a bit more gain and the equalization is very different on the touring file.

[Onizukachan]

for:F31 LHD,
expectation: driver centric but still pleasant from passenger seat

Equipment: match7up with HK tweeter added to HIFI center channel and SWS 8xi underseat subwoofers

started with Touring profile for EQ and TA then tweaked gain levels, mild eq tweaks and x-over's changed

T/A still not perfect but for a first attempt it sounds pretty ok to me. happy for feedback or t/a numbers as i feel the original profile might be e60 or e90 based as it is a little "airy".

Im setting levels by using same tracks on PETSOUNDS 40th anniversary CD in mono vs stereo, as well as then checking with Linkin Park's Collision Course and last 3 minutes of Depeche Mode 's Just Cant Get Enough Schizo mix, Get the Balance Right, and Everything Counts.

EDIT: Ignorethis one & see later post.

[quakerroatmeal]

Originally Posted by Onizukachan

The limousine is flatter sounding, is the best I can describe it. Less dynamic. Might actually turn out to be more correct but I like the touring file better for now.

Toggling between the two I noted a bit more gain and the equalization is very different on the touring file.

Thanks I just installed the amp and limousine setting does sound pretty flat to me. Did you adjust any of the amp gain and what’s your in car tone settings set at? Going to try the other file.

[Onizukachan]

Head unit set to flat all around. Fade balance treble and bass.
Left amp gain on amp at factory setting (full left iirc). It’s PLENTY loud on touring profile!

[quakerroatmeal]

What settings are ya using with a aftermarket under seat subwoofer? Still the same one provided by Audiotec Fischer?

[Onizukachan]

Plus 4 db, different xover point and type.

[quakerroatmeal]

Originally Posted by Onizukachan

Plus 4 db, different xover point and type.

Thanks I'm try your tune see how it sounds.

[Onizukachan]

Redid it all, EQ , Gain levels and did my own t/a this time as i wasn't happy with settings that had been shared or that were built in to the profiles.

Equipment: F31 with match up7bmw, SWS 8xi w polyfill, factory center channel with HK tweeter and HK metal grill added (yes, both are pnp and yes the grill does make a surprisingly notable difference so want to be honest about it)

This is a LHD driver centric tune, taking advantage of the center channel, though it doesn't change the focus very much if off/muted, nor does turning off the rear door speakers as they are heavily bandpassed and turned way down as they should be.
For RHD:
Note there are very minimal eq differences in front channels right around 250hz to look for, otherwise the eqs are same left to right so it would just be copying the settings for gains and t/a and inverting them for UK/OZ/NZ/JAPAN drivers...

Using "Caroline, No" in both mono or stereo you should hear the opening percussion in front of driver (especially the 3rd beat which was smearing even on mono till i found a small peak in right side that the left, being off axis, didnt have ) and the subs should sound like they are "in the dash" mostly. Some very mild smearing and a bit low height on some frequencies to be honest since the 4's just dont go low enough with authority, and the sws are a bit weak in midbass but the 4" do get down to 80ish with some acceptable amount of volume and over 100hz are ok with some eq, but I've tried to minimize/optimize by allowing overlap on x-overs, being very aggressive on crossovers roll off, and as well as finding the peaks where both play decently and knocking them down mostly on the sub channels to try to keep stage height and imaging intact.
The subs are a bit tamed and T/A'd as well and blend now much better as a result, but will still knock your socks off enough to where you might not even want a boot sub in your touring... and if you did you'd want a 12 or 15 sealed because a 10 (IMO) would do nothing for you.


This file is what i was expecting/hoping to hear when i installed the match up 7bmw and loaded the match Touring profile, though even that was 5x better than stock!
this? this is a whole `nother level. like going from a TV soundbar to a true 5.1 home theater of difference.

[quakerroatmeal]

You laid down polyfill where? Where the factory sub was? Made any difference? I stuck some sound deadening down there.

[Onizukachan]

Originally Posted by quakerroatmeal

You laid down polyfill where? Where the factory sub was? Made any difference? I stuck some sound deadening down there.

Yes, when I pulled the enclosures out to install the earthquakes, I put poly fill (from pillow that got washed but was then replaced for being lumpy) all around the interior edges in the enclosure… especially the corners and across the vent area to hopefully muffle some turbulence. Seems to have helped as I don’t have near the side skirt buzzing I did stock… but couldn’t 100% say that was it as it could have been the speaker change as well.

[Billfitz]

Adding polyfill to an underseat enclosure would have some effect, but not a lot unless it was fully filled and compressed. The lower resonant frequency of the Earthquake driver might have an effect on the side skirt buzzing. My skirt buzz hasn't been loud enough to warrant my investigating it.