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      09-27-2018, 07:20 AM   #111
Billfitz
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You probably already have proper speakers. If they're similar to those in the hi-fi system they most definitely are proper. Ignore advertising piffle that claims otherwise without definitive data that proves what they claim. As to the under seat enclosures, getting higher performance with them is not impossible, given the right driver with enough power. If the enclosure could use standard design drivers there are some that would do the job. But the enclosure can't use standard drivers, it must use a low profile driver, and few of those exist. Of those that do exist are they actually better than stock? Only with full data sheets on both the OEM and the replacements can one know for sure.
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      09-28-2018, 03:16 PM   #112
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I have the jehnerts and they were nice and much better than the stock. However it doesn't produce low frequencies but that is more due to the enclosures limited space. I just built and installed a sub that goes in the space under the cargo floor to take care of that.
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      10-14-2018, 11:14 PM   #113
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What do you guys think of audison ap8 for underseat woofers
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      10-15-2018, 07:52 AM   #114
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It's less capable than the BMW driver in all respects. Besides, it won't fit. The APBMW S8-4 will fit, and it has better specs, but it's still no better than the stock woofer.

Here's what you've got to be aware of when looking at replacement woofers. The Audison APBMW S8-4 claims to 'have been designed with electro-acoustic parameters that maximize performance for the factory box available below the seats.' . That claim is true. However, it's also true of the stock woofer.
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      10-15-2018, 08:37 AM   #115
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I have the Match MW 8BMW-D subs in my 2012 135i coupe. Running off the stock amp, there really wasn't much improvement. So I installed a Kenwood KAC-M3004 amp (150W x 2 bridged) and now they sound great. I did have to tweak the LPF very carefully around 120Hz and the volume balance, otherwise they can get a bit boomy. Bottom line is you should upgrade the amp before or along with a sub upgrade.



I also upgraded the door speakers with Match MS 42C-BMW.1 running off a Kicker KEY180.4 amp which does Auto EQ and time alignment and they sound great too.

https://www.1addicts.com/forums/show....php?t=1534261
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      10-15-2018, 10:30 AM   #116
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Quote:
Originally Posted by Stubbie Blue View Post
I have the Match MW 8BMW-D subs in my 2012 135i coupe. Running off the stock amp, there really wasn't much improvement.
There couldn't have been any improvement, because here again that driver is no better than the stock driver.
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I installed a Kenwood KAC-M3004 amp (150W x 2 bridged) and now they sound great.
They're ya go. The stock drivers aren't the least bit deficient, the stock amp is.
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I also upgraded the door speakers with Match MS 42C-BMW.1 running off a Kicker KEY180.4 amp which does Auto EQ and time alignment and they sound great too.
Same deal. The door speakers aren't weak, the stock EQ is.
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      10-15-2018, 09:49 PM   #117
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So you dont recomend them the ap8. I guess its between jehnert/ghost/gladon one.

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Originally Posted by Billfitz View Post
It's less capable than the BMW driver in all respects. Besides, it won't fit. The APBMW S8-4 will fit, and it has better specs, but it's still no better than the stock woofer.

Here's what you've got to be aware of when looking at replacement woofers. The Audison APBMW S8-4 claims to 'have been designed with electro-acoustic parameters that maximize performance for the factory box available below the seats.' . That claim is true. However, it's also true of the stock woofer.
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      10-15-2018, 10:12 PM   #118
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The only woofer I've seen with specs that confirm a real improvement over stock is the Earthquake, and then only if you do a serious amp power upgrade. Go back and read Post #60.

Last edited by Billfitz; 12-02-2018 at 11:52 AM..
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      12-02-2018, 07:30 AM   #119
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Hi,

In my F36 I only have the Hi-Fi audio setup. It sound pretty much flat and no base. The midrage speakers and tweeters are ok from what my ears can tell. Amp is garbage that's for sure.

I would like to replace the under the seat woofers if someone here can confirm that it worth the investments.

I was thinking to get these since are budget speakers, around 300euros for both speakers.

https://www.focal.com/en/car-audio/c...wr/ifbmw-subv2

Are these OK, should I get something else or just replacing the amp and keeping the stock speakers would do the trick?

Not sure what to get as amp if needed, something that does not go over 600euros and could push as it should those 2 woofers and send some more juice to the other speakers in the car.

Waiting for your feedback.
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      12-02-2018, 08:40 AM   #120
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There's nothing wrong with the stock woofers. The amp and DSP is where improvements may be had. Recommendations abound for the three plug and play options that exist.
The only way to know if those Focal will work any better than the stock driver is with the Focal data sheet, which would look like this if there was one:
http://www.focal-america.com/wp-cont...ical_sheet.pdf

I can't find one for the driver you linked. The specs they do list are inadequate to draw any conclusions.
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      12-02-2018, 11:08 AM   #121
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Quote:
Originally Posted by Billfitz View Post
There's nothing wrong with the stock woofers. The amp and DSP is where improvements may be had. Recommendations abound for the three plug and play options that exist.
The only way to know if those Focal will work any better than the stock driver is with the Focal data sheet, which would look like this if there was one:
http://www.focal-america.com/wp-cont...ical_sheet.pdf

I can't find one for the driver you linked. The specs they do list are inadequate to draw any conclusions.
I've found the specs, however I understand nothing from it.

https://www.focal.com/sites/www.foca...tion-sheet.pdf
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      12-02-2018, 11:49 AM   #122
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Those aren't specs. The document I linked to shows specs, specifically for that particular driver:

Rdc 3.2 Ohms
Fs 30Hz
Mms 190g
Cms 0.15mm/N
Vas 25l
Qts 0.78
Qes 0.95
Qms 4.5
Bxl 11.2N/A
Sd 346cm2
SPL 84dB
Xmax 11mm

With those specs one can use speaker modeling software to very accurately predict how a driver will work, making possible very accurate comparisons between different drivers. It's how I made comparisons between the OEM drivers, the specs of which I measured, and other drivers in posts # 60, 80, 94, 114, and 116.
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      12-02-2018, 02:16 PM   #123
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Quote:
Originally Posted by Billfitz View Post
Those aren't specs. The document I linked to shows specs, specifically for that particular driver:

Rdc 3.2 Ohms
Fs 30Hz
Mms 190g
Cms 0.15mm/N
Vas 25l
Qts 0.78
Qes 0.95
Qms 4.5
Bxl 11.2N/A
Sd 346cm2
SPL 84dB
Xmax 11mm

With those specs one can use speaker modeling software to very accurately predict how a driver will work, making possible very accurate comparisons between different drivers. It's how I made comparisons between the OEM drivers, the specs of which I measured, and other drivers in posts # 60, 80, 94, 114, and 116.
This is what I found on a germam webpage, translated them with google:

https://www.hifitest.de/test/car-hif...-bmw-sub_11853


Technical specifications
Nominal diameter TT 200 mm
Installation depth TT 42 mm
Nominal diameter MT 100 mm
Installation depth MT 44 mm
Membrane HT 25 mm
Housing HT 43 mm
Slope MT (HP) / MT (TP) / HT No / No / 18 dB
tweeter No
Level adjustment HT No
suitable for (manufacturer) E 81, 82, 84, 87, 88, 90, 91, 93, F10, 20, 30, 31, 34
miscellaneous No
Nominal impedance TT / MHT 4 ohms
DC resistance Rdc 3.70 ohms
Voice coil inductance Le 0.60 mH
Voice coil diameter 40 mm
Membrane area Sd 272 cm2
Resonant frequency fs 31 Hz
mechanical grade Qms 8.69
Qes electrical grade 1.31
Overall QT 1.14
Equivalent volume Vas 38.2 l
Moving mass Mms 72.7 g
rms 1.61 kg / s
cms 0.37 mm / N
B * l 6.30 Tm
Sound pressure (TT) 2 V, 1 m 82 dB
performance recommendation 50-150 W
Price-performance Well
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      12-02-2018, 02:25 PM   #124
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I have the gladen extreme 201. Runs well at 2 ohms.
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      12-02-2018, 07:48 PM   #125
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The Focal response goes a bit lower than the OEM woofer, about 10Hz. However, its actual impedance is considerably higher than the OEM woofer, so with the stock BMW amp it won't go quite as loud as the BMW woofer. To make it a worthwhile swap you'd need to at least double the amp power.
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      12-02-2018, 10:15 PM   #126
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If u have Hifi option (676) u should consider swapping the amp with Match UP 7BMW. See if u are happy with the improvement before consider swapping the speakers. I swap out the amp in X3 and the bass is much better. If u want deeper thump, u can use the rca out for additional trunk sub.
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      12-03-2018, 08:41 AM   #127
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Quote:
Originally Posted by Billfitz View Post
The Focal response goes a bit lower than the OEM woofer, about 10Hz. However, its actual impedance is considerably higher than the OEM woofer, so with the stock BMW amp it won't go quite as loud as the BMW woofer. To make it a worthwhile swap you'd need to at least double the amp power.
Thanks for all the information. It is really helpful and I appreciate your effort.
Would you point me on specs of all the speakers and amp in the HiFi setup?

I presume that all the amps that are plug and play are around 1000$, i was wondering if I could get something more cheaper.
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      12-03-2018, 08:42 AM   #128
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Quote:
Originally Posted by pierreye View Post
If u have Hifi option (676) u should consider swapping the amp with Match UP 7BMW. See if u are happy with the improvement before consider swapping the speakers. I swap out the amp in X3 and the bass is much better. If u want deeper thump, u can use the rca out for additional trunk sub.
Seems the way to go in this case, the only concern is that this amp seems expensive for what it is delivering. Any other cheaper options?
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      12-03-2018, 09:39 AM   #129
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I recently installed the older 82DSP amp in my X3- it is quite a step up in sound quality from the stock amplifier. You might keep eye out for used Unit as I did- save $$$.
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      12-03-2018, 10:26 AM   #130
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Quote:
Originally Posted by egrimisu View Post
I presume that all the amps that are plug and play are around 1000$, i was wondering if I could get something more cheaper.
There's nothing cheaper that's plug and play. Two factors are not in your favor. One is that no one other than BMW group uses the same wiring configuration. The other is that since there are only a few plug and play options available they can demand and get a premium price for them. C'est la vie.
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      12-03-2018, 06:31 PM   #131
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Quote:
Originally Posted by egrimisu View Post
Seems the way to go in this case, the only concern is that this amp seems expensive for what it is delivering. Any other cheaper options?
I doubt there is other option for PNP. 7BMW is the better option as the underseat sub channel is 160W and which is much higher than bimmertech amp.

P/S: You could get 7BMW from ebay for USD 750. I bought from below seller.
https://www.ebay.com/itm/NEW-Match-U...3ZeS:rk:9:pf:0
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      12-03-2018, 07:00 PM   #132
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Quote:
Originally Posted by pierreye View Post
I doubt there is other option for PNP. 7BMW is the better option as the underseat sub channel is 160W and which is much higher than bimmertech amp.

P/S: You could get 7BMW from ebay for USD 750. I bought from below seller.
https://www.ebay.com/itm/NEW-Match-U...3ZeS:rk:9:pf:0
I live in France but I found a cheap one in Romania. Sticking to that, I really hope this will satisfy my ears. Cheers!
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