[partypat]

Hey all,

I have installed my xd600/6 and my SWS-8xi. Install has been flawless. I however am not an audio expert.

I have my xd600/6 channel 5&6 set for low pass at 27 clicks (Thanks to info from Technic) which is 174Hz.

I have the input gain set for the 9 o'clock position.

When I play music, I have to have the Bass set to +6 to get the sound I want from the subs.

How can I get the same sound from the subs without maxing out my HU to +6 in the bass dept.

Thanks all

Patrick

[Technic]

- Is the XD600/6 Input Mode set to 4CH?
- Are the SWS-8xi new or used?
- Are the SWS-8xi connected wiith the correct polarity to the XD outputs?
- Try gain at 11 o'clock while reducing bass to 2 clicks

Originally Posted by partypat

Hey all,

I have installed my xd600/6 and my SWS-8xi. Install has been flawless. I however am not an audio expert.

I have my xd600/6 channel 5&6 set for low pass at 27 clicks (Thanks to info from Technic) which is 174Hz.

I have the input gain set for the 9 o'clock position.

When I play music, I have to have the Bass set to +6 to get the sound I want from the subs.

How can I get the same sound from the subs without maxing out my HU to +6 in the bass dept.

Thanks all

Patrick

[partypat]

Technic,

Thanks for the input.

The sws are used, and came prewired with harnesses - I assume they are likely yours from the previous owner. I can go in this weekend and recheck the polarity, you never know.

The xd600/6 is set for 4 ch

I'll try the gain at 11 o'clock. Is there any risk of damaging them with this much gain?

Thanks again

[Technic]

No, the SWS-8 are not mine... the last set of SWS-8 that I sold were back in 2009 or so.

Put your OEM woofers back and try. If they are louder than the SWS-8 then the SWS-8 are busted.

Originally Posted by partypat

Technic,

Thanks for the input.

The sws are used, and came prewired with harnesses - I assume they are likely yours from the previous owner. I can go in this weekend and recheck the polarity, you never know.

The xd600/6 is set for 4 ch

I'll try the gain at 11 o'clock. Is there any risk of damaging them with this much gain?

Thanks again

[partypat]

I meant the harnesses .

They are definitely louder more responsive than my stock ones were. I just want to know how much gain I can run without damaging them... And how would I ever know that, before going beyond.

[Technic]

Originally Posted by partypat

I meant the harnesses .

They are definitely louder more responsive than my stock ones were. I just want to know how much gain I can run without damaging them... And how would I ever know that, before going beyond.

If they are much louder than the OEM woofers then your problem is that you should have gotten a trunk sub... the level of bass that you are looking for is way beyond the SWS-8Xi capability. That's the reason of your Bass setting of 6+ and creating this thread to begin with.

I do not recommend a gain (XD600/6) of more than 9 for OEM woofers with Bass level of 3+ max. For SWS-8 I have done 10 and 5+. That should be more than enough bass without a trunk sub.

Gain is only going to give you a steeper slope at any given volume level, it is not going to give you more bass than what it is physically available. Meaning: if there is a max bass level of 10 (no clipping, no bottoming out, no distortion) at a max volume of 10 in 1-step proportion (bass level 1 at volume level of 1), then increasing the gain could give you a bass level of 7 with a volume level of 4, for example. You may end up maxing the bass (10 level) with a volume of 6 and blowing them up if you keep raising the volume level.

[partypat]

Originally Posted by Technic

For SWS-8 I have done 10 and 5+. That should be more than enough bass without a trunk sub.

I have it at 10 4+ and it's perfect for me. Thank you.

[partypat]

Originally Posted by Technic

your problem is that you should have gotten a trunk sub... the level of bass that you are looking for is way beyond the SWS-8Xi capability.

Gotta start somewhere right?

[Najt]

is it possible to blow up the SUBs with maximum gain and max volume of HU?

when the volume is low , subs are very deep and noticible. But with raising volume, SUBS stop at some level and only MIDS and TWEET are going up.

I have tried to connect OEM SUBS, and with raising volume, the SUBS were not so loud ...almost same situation like with aftermarket SUBS

[bmw325i]

Originally Posted by Najt

is it possible to blow up the SUBs with maximum gain and max volume of HU?

when the volume is low , subs are very deep and noticible. But with raising volume, SUBS stop at some level and only MIDS and TWEET are going up.

I have tried to connect OEM SUBS, and with raising volume, the SUBS were not so loud ...almost same situation like with aftermarket SUBS

Did you amp them? From what your describing it seems like the amp or headunit is clipping.

[Najt]

hi. yes. subs are connected to the AMP and gain is set to 9 oclock. Maybe the HU is really gone

[ctuna]

with the gain for the under seats set at 11
When I first installed the amp I had to have the bass
at a slightly negative number to balance it with treble.
I am running Jehnerts now at that number with Morels dotechs
in the doors with very little gain on the doors. Something is wrong if you
have to apply much compensation with the bass and treble
controls things are not balanced out or setup right.

I think it would be good idea to get out the volt/ohmeter and do some resistance checks to start with . And you did start out with a Hi Fi system to start with right and not the base system?
Amp to speaker resistance checks.
I am assuming the under seats and the doors are now split from the original parallel wiriing with the
Technic Harness if you had started with stereo and you have recoded or got a clean weep or equivalent?

[Najt]

Originally Posted by ctuna

And you did start out with a Hi Fi system to start with right and not the base system?

what dou you mean?

Originally Posted by ctuna

I am assuming the under seats and the doors are now split from the original parallel wiriing with the
Technic Harness if you had started with stereo and you have recoded or got a clean weep or equivalent?

what do you mean? I've just replaced the OEM speakers for powerfull ones. Wiring is still the same.



well before XD600/6 install the sound was pretty clear and bass recongizeable. But after while the sound is terrible. SUBs are barely noticable even with max gain. The whole sound curve is strange with adding volume.

I put back oem amp. And I have to change the FQ settings. Bass almost at max. And fade more to rear, since they were less noticiable. I have onle little time on weekend, and during week I am abroad.

But 1 fact is: that audio is strange now, even with origin amp.

The question is what is burn - out. the HU? The crossovers? The Subs?

[ctuna]

There are three levels of BMW sound systems
Stereo no amp
Hi Fi amp and 10 speakers 10 amp channels
Top Hi Fi or L7 amp and 13 speakers 9 amp channels
Each one requires different things to modify succesfully
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=343673
http://www.e90post.com/forums/showthread.php?t=138949
http://www.e90post.com/forums/attach...1&d=1209780605
http://www.e90post.com/forums/showthread.php?t=641323
http://bmwcoders.com/forum/3-er-8/bm...1-e92-e93-291/
http://www.e90post.com/forums/attach...1&d=1209780865
http://www.google.com/url?sa=t&rct=j...,d.cGU&cad=rja
http://www.musicarnw.com/page-2/
http://www.e90post.com/forums/attach...4&d=1278871872

The wiring is different for each
In the stereo system the undeseats are wired in parallel
with the doors .
In Hi Fi and Top Hi Fi each location has its own amp channel.
So you said you put back the factory amp does that mean you
have Hi Fi? Not confirmed which system you started out with
at least from what I have read. You kind of just dropped in on
this thread without much info on what you started with.
If something is burnt usually a visual and smell test can find
it. Next step ohmmeter to check the resistance on speakers.

[JazStar740]

Partypat,

Sounds like you are maybe having the same issue I was having with the SWS8's. Mine were moving a lot of air, with the door sills off you could feel all the air blowing out the holes but the sound of the bass was weak and missing punch. After lots of adjusting I finally changed polarity on ONLY ONE of the SWS8's and made a world of difference. My bass setting is at a -4 and it hits hard....

[Najt]

aahh.sorry. yes. I have hi-fi audio setting in car.

So I will take the voltmeter and check the resistance on cables from amp heading to speakers right?

I dont know what exactly happen, but even with OEM amp, the sound is totaly unlistenable... it seems like some frequencies are missing...could I someho damaged the soundspeakers? if the will be damaged, they wouldnt even play or the sound will be veryy clipping and distored right? but the music is just completly without melody, power...its really strange

I have checked the the polarity...everything is fine... but the SUBS are not moving so much...they are noticeable...but with raising volume...they dont moove much... only MIDS and HIGH goes up. the problem is that even with origin amp, the sound is now terrible

[buster84]

Originally Posted by Najt

aahh.sorry. yes. I have hi-fi audio setting in car.

So I will take the voltmeter and check the resistance on cables from amp heading to speakers right?

I dont know what exactly happen, but even with OEM amp, the sound is totaly unlistenable... it seems like some frequencies are missing...could I someho damaged the soundspeakers? if the will be damaged, they wouldnt even play or the sound will be veryy clipping and distored right? but the music is just completly without melody, power...its really strange

I have checked the the polarity...everything is fine... but the SUBS are not moving so much...they are noticeable...but with raising volume...they dont moove much... only MIDS and HIGH goes up. the problem is that even with origin amp, the sound is now terrible

I know this is an obvious question, but did you check the bass setting in you head unit/navigation unit? If that is set on the lowest setting that could explain why you have no bass.

If its still not working, connect the oem subs (since you new 8's are installed under the seat) to the amp in the trunk and listen for sound. If you have no sound at all then something is wrong with the output from the harness, or the head unit its self. Then to test this more, move the 8in sub wires from the 5/6ch and connect them to channel 1/2 and see if you get any bass (remove the front speaker first).

This will help determine if the rear channel is bad on your head unit. Maybe the single is so weak that the amp can't duplicate it for the 5/6 channel's. This is how i test stuff by looking at all possibilities first. If you still can't figure it out, I'd suggest tossing it all back together like it was stock and going into the dealers (if you have a warranty) If not it could be very costly at the dealer...

[Najt]

thanks. i dont think that something wrong is with the AMP. coz the sound is weird with OEM amp now also . So only option is HU is broken (i cant understand how XD600/6 could break it) or somehthing wrong is with harness or crossovers or speakers... i will check step by step...its really time consuming and my diplom thesys has to be done first

[Najt]

hi. so small update.
I took out the amp. and connect it to friend of mine e90 with oem hifi audio. Sound was so fucking briliant and pure...that I would almost cry.

so amp is fine. I check resistance on each cannal of amp...and its really strange. When music was on:

front left has 7Ohm, right 6Ohm, rear right 7Ohm, rear left 0Ohm, subs had various resistance...like 0-150ohm... depending on what sound was played

if the radio was off. results were similar except the subs...the resistance was 0 Ohm.

So AMP is fine. Things to check , which could be broken:
1] Head unit
2] Crossovers
3] Speakers
4] Cabels?

[Najt]

so my speakers are gone! all of them! it seems the amp si to much power i was driving in the city ..volume almost at max for 10minutes...then i smell something not very nice ...like burned squarel and speakers changed their sound and get buzzy..

I think problem is that amp has 6x60watt@8ohm and MASK produce another 25w .. therefore when speaker spec are following, they can NOT handle it

Audio System XION 200 BMW spec :
BASS
diameter: 200 mm
impedance: 4 Ω
power rms: 80 W
power max: 120 W

MID
impedance: 4 Ω
power rms: 70 W

-------

i didnt expected that also the rear individual speakers will blow up

[coloradoe92m3]

Sounds like you really have no clue what you are doing brah..

[sd_luis]

have you switch the frequency to low pass? jsut on the woofers