[arverson]

Hello all,

Does anybody know the volume of the e90 underseat enclosure? Trying to pick an aftermarket 8 inch midbass driver that will suit the application.

Also, does anyone know the depth we have to play with for the driver?

Thanks.

[ctuna]

https://www.e90post.com/forums/showthread.php?t=641323

See entry 6 in the above link and the links contained in it.

BMW stereo types
http://www.e90post.com/forums/showthread.php?t=352586
http://www.e90post.com/forums/attach...2&d=1266451970
http://www.e90post.com/forums/attach...2&d=1260829447
http://www.e90post.com/forums/showthread.php?t=138949
http://www.e90post.com/forums/attach...1&d=1209780865
http://bmwcoders.com/forum/3-er-8/bm...1-e92-e93-291/
http://technicpnp.com/menuDiagrams/d...e90_92_93.html
http://www.musicarnw.com/page-2/
http://www.e90post.com/forums/attach...3&d=1169133185
http://www.e90post.com/forums/attach...1&d=1209780605
http://www.e90post.com/forums/showthread.php?t=641323
http://www.e90post.com/forums/attach...4&d=1278871872
http://www.e90post.com/forums/showthread.php?t=343673

There are many aftermarket plug and play BMW Speakers.
From Jehnert , Gladen , Helix Match, Audio Systems , Diamond Audio , Rainbow etc,etc.

[arverson]

Thanks ctuna,

Have already gone thru the audio thread in the previous weeks. I am looking at getting a Dynaudio, Morel, SB Acoustics or Scanspeak driver for midbass duties. I have searched but have not found the air volume of the enclosure, therefore I cannot model the specs in an audio program to find the best suitable driver. I also cannot narrow my driver search if I dont know the depth.

[arverson]

I am not interested in any of the upgrades systems mentioned in your other posted threads.

I have already planned the rest of the complete system (Alpine Halo9 head unit, Alpine H800 processor, Dynaudio 430 midrange, Dynaudio 102 tweeter, Audison Voce amps) and am stuck on midbass.

[E92x7z]

i have 2 empty boxes do you want to measure the depth ????? 5 cm !!! from the bottom edge to the floor

i not sure that they are E90

View post on imgur.com

[arverson]

Thanks E92x7z, 5cm isnt much and does limit my available options somewhat, but its workable with a custom baffle.

Doesn't look like there's much volume either. Do you know if its a sealed enclosure, or does it vent out to the chasis somewhere?

[E92x7z]

Originally Posted by arverson

Thanks E92x7z, 5cm isnt much and does limit my available options somewhat, but its workable with a custom baffle.

Doesn't look like there's much volume either. Do you know if its a sealed enclosure, or does it vent out to the chasis somewhere?

have port need pic ?

front seats maximum to Fore an see it !

[arverson]

Originally Posted by E92x7z

have port need pic ?

sure

any chance you could seal off the port and measure the volume somehow? (with water, bean-bag filling, etc)

[mweisdorfer]

Originally Posted by arverson

Hello all,

Does anybody know the volume of the e90 underseat enclosure? Trying to pick an aftermarket 8 inch midbass driver that will suit the application.

Also, does anyone know the depth we have to play with for the driver?

Thanks.

Probably like .3 cubic feet.

Mounting depth unless you want to shim your seats up with 1/2" SS nuts & larger bolts, would be about 2.65" max. I'm serious when I say 2.65". 2 5/8".... 2.5" and you are totally safe.

Look at Pioneer TS-A2000LD2

I have heard really good things about these.

https://www.sonicelectronix.com/item...-A2000LD2.html

There are not a whole lot of options, if you want a "true" mid-bass sub that has a frequency range of 40 to 500mhz or so.

I did Kenwood Excelon KFC-XW800F underneath the seats with highly modified OEM boxes. I had to shim the seats up 1/2". I'm 6'1" tall, so it worked for me. If you are taller than that, it probably won't work for you. I got both subs for about $165.00 total. I think the mounting depth was 2.75".

I coupled that with a JL Audio 10W1v3-4 in a corner mounted trunk box. I have the ski pass trunk access; therefore you don't really need 12 or 15" sub.

https://www.ebay.com/itm/152913063185

The sub box above fits perfectly & it's made 100% of fiberglass for optimal sound.

These guys were awesome & the box is custom to your set up (car & sub).

My subs are powered by an Alpine MRX-V60 & JBL MS-8

The whole idea is that the subs under the seats play 80 to 500mhz & the sub in the trunk plays 80 to 20mhz. So, they compliment each other. That's where the JBL MS-8 comes in. Yes, you can set this manually with cross overs on the Amp. which the JBL-MS 8 does as well, but the JBL-MS 8 also adds surround sound & a 31 band EQ.

[kaigoss69]

I measured it once at about 0.1 ft3 IIRC. But the volume is not that important, because the enclosure is vented to the side sill cavities, therefore not acting like a sealed enclosure, but more like a leaky one. I installed 8" Morels and 10" Morels, among others. The 8" Morels were with the stock enclosure. They sounded good. Then I installed 10" HCW-10's and I vented the bottom of the enclosure to the outside of the car by drilling holes in the floor pan. This was essentially IB and resulted in the best midbass response. I was running 50-100Hz on them.

[kaigoss69]

If you want to stick with Dynaudio, I'd go for the 8" Volvo drivers. I always wanted to try them, and I'm sure they would fit, with some modifications. They are made to run IB I believe.

[arverson]

Thanks kaigoss69, ill add the dynaudio 8" volvos to the list of potential midbass drivers.

I have a 12" Morel Ultimo which will take care of subbass duties. Ill be bandpassing the dynaudio 430s from 200hz to 7 khz, so I only need the midbass to play a narrow bandwidth from about 80hz up to 200hz.

I see you have a idmax in your signature. Awesome subs, had one about 10 years ago. Wish i never sold it!

[kaigoss69]

Originally Posted by arverson

Thanks kaigoss69, ill add the dynaudio 8" volvos to the list of potential midbass drivers.

I have a 12" Morel Ultimo which will take care of subbass duties. Ill be bandpassing the dynaudio 430s from 200hz to 7 khz, so I only need the midbass to play a narrow bandwidth from about 80hz up to 200hz.

I see you have a idmax in your signature. Awesome subs, had one about 10 years ago. Wish i never sold it!

No problem and good luck with your build. I went through many different types of drivers over the years, and my last configuration was the best (see signature). For me, the single most important part was always the midrange. I had Focals, Rainbows, Hybrid Legatias, Jehnerts, and the JBL GTi's. By far, the JBLs were the best for the application because they could easily play 100Hz, and that made all the difference. People say imaging is not affected in that range, I say BS. Listen to the difference and then tell me again. For example, when I had the crossover at 200Hz, or more, the notes got drawn out between the windshield and the floorboard, plus you could feel them through the seat, messing with your head a bit more. Crossed at 100Hz, voices, guitar string plucks, kick drum, you name it, it came from the windshield, and there was more definition. A HUGE difference between 100 and 200Hz. Therefore, I would never again install a midrange that cannot play 100Hz with authority. Something to consider!

[ctuna]

If you want to know the actual volume fill with water then
measure the amount of water. Usable volume compute the diameter
and depth using the measurement device of your choice..

In one of VP electricity's installs he cut out the bottom to extend the size
of the speaker he could get in there.
This one

http://www.e90post.com/forums/showthread.php?t=833581

May be of some use

https://www.e90post.com/forums/attac...3&d=1329017429

Your picture of the enclosure looks different than mine maybe because its a close up.

[arverson]

Thanks ctuna, may have to fibreglass a whole custom box if i cant fit my desired midbass driver

[Emilime75]

If you're going to be running your mids up to 7k, or anywhere near that, than those MD 102s are a giant waste of money.

You'd be better off with a smaller/cheaper tweeter, which would also be easier to mount in the sails, if that's where you're going to install them.

A smaller tweeter will (typically) have better dispersion, and being high passed that high, there's virtually no fear of power handling when all it'll be doing is adding some "sizzle".

[arverson]

Originally Posted by Emilime75

If you're going to be running your mids up to 7k, or anywhere near that, than those MD 102s are a giant waste of money.

You'd be better off with a smaller/cheaper tweeter, which would also be easier to mount in the sails, if that's where you're going to install them.

A smaller tweeter will (typically) have better dispersion, and being high passed that high, there's virtually no fear of power handling when all it'll be doing is adding some "sizzle".

Im able to have the tweeters high-passed like that because the 430 midrange is capable of playing essentially like a widebander. Also, I already have the 102 in my possession from a previous install, might as well use what I have. I plan to install both the midrange and tweeter on the A-pillar, to raise stage height and keep both drivers on the same plane for imaging purposes.

[GeorgeR]

For my 2009 335i E92 I used Morel Hybrid 402 component sets and Jehnert XE200 woofers for the front stage with a corner loaded OE style sub enclosure with the JL 12W3v3-4 subwoofer, Twk 88 DSP, JL XD500/3 and XD600/6 amps

Like you, for my newer X6 F16 I used Dynaudio for my front stage. The system includes the Helix SDMI25 -> Helix DSP Ultra, Amps, MMats HiFi-6150D & 4250D, Arc Audio KS125.4 Mini. Front Stage (FL/C/FR) Dyn Esotar 430, Esotec MD 102, Illusion Audio C8-W. Rear Stage, Morel Hybrid 402, Rear pillars OEM. Sub, ScanSpeak Rev 28W.

https://f15.bimmerpost.com/forums/sh....php?t=1681701

I was going to use the Jehnert for my X6 but they are no longer available. I narrowed my choice down to the Audio Development W800NEO and a new version of the Illusion Audio C8-W. I went with the C8-W since my installer is a dealer and could support it. I’m now hearing very positive reviews on the Focal Utopia M 8WM for those with very deep pockets.

[ctuna]

That's some high end stuff.
Jehnert Xe-200's still seem available .
I guess they don't fit in an x6?

[mweisdorfer]

Originally Posted by GeorgeR

For my 2009 335i E92 I used Morel Hybrid 402 component sets and Jehnert XE200 woofers for the front stage with a corner loaded OE style sub enclosure with the JL 12W3v3-4 subwoofer, Twk 88 DSP, JL XD500/3 and XD600/6 amps

Like you, for my newer X6 F16 I used Dynaudio for my front stage. The system includes the Helix SDMI25 -> Helix DSP Ultra, Amps, MMats HiFi-6150D & 4250D, Arc Audio KS125.4 Mini. Front Stage (FL/C/FR) Dyn Esotar 430, Esotec MD 102, Illusion Audio C8-W. Rear Stage, Morel Hybrid 402, Rear pillars OEM. Sub, ScanSpeak Rev 28W.

https://f15.bimmerpost.com/forums/sh....php?t=1681701

I was going to use the Jehnert for my X6 but they are no longer available. I narrowed my choice down to the Audio Development W800NEO and a new version of the Illusion Audio C8-W. I went with the C8-W since my installer is a dealer and could support it. I'm now hearing very positive reviews on the Focal Utopia M 8WM for those with very deep pockets.

How do you like the Twk 88 DSP??

Yes, you do need two amps really. I have two. One 6 channel & one 5 channel. The 5 channel runs the subs.

[GeorgeR]

Originally Posted by ctuna

That's some high end stuff.
Jehnert Xe-200's still seem available .
I guess they don't fit in an x6?

Musicar NW said Jehnert's were no longer available, at least in the USA and I confirmed with the USA distributor. There may still be some in Europe. They would fit the X6 and I did find a used pair but am very happy with the C8-W.

[GeorgeR]

Originally Posted by mweisdorfer

How do you like the Twk 88 DSP??

Yes, you do need two amps really. I have two. One 6 channel & one 5 channel. The 5 channel runs the subs.

While no where near the level of the Helix Ultra DSP, the Twk 88 is a very good DSP and well suited for the more basic set up in my E92. It only has 8 DSP channels though (passive front stage, disconnected center speaker, driver seat tune) vs. the X6 with active FL/FR and center speakers and a two seat tune in addition to the driver seat tune. I used all 12 DSP channels in my X6 and could have used one more but by summing the rear pillar speakers as effects, it turned out great. It took 3 amps.

I choose a JL Audio VXi series for my Landcruiser, again a fairly basic stereo upgrade, and it is similar but a bit more advanced than the Twk 88.