[kayza]

Hello all,

I finished my install about three weeks ago and installed the following setup:

Xd600/6
Kicker Ssmb8
Dls R4 components for the front l/r, tabs shaved and dynoed into place using technic's method on the forums.

NOTE: I have no intention of using the rear channels, but I do have pdc that I would like to maintain the beeping signal, although I don't care whether it comes from rear speakers.

I am welcoming feedback on crossover settings for the dls components, as well as figuring out what makes most sense for amp settings, as well as connection setup knowing that I only need to power 4 channels from the amp.

I will be using my galaxy nexus through aux input for most of my playback, due to it having a 10band eq, or since I am rooted I can install other dsps on it if anyone has recommendations. So with that in mind, I can do tuning with it as well. So many different ways to make adjustments!

I suppose the first thing for me to learn is what I need to set my amp passes and frequencies at for each speaker pair. I currently have the dls high passed at 90-95hz, and the ssmb8 low at 120hz. I am looking to get that kick bass and other mid bass sound from drum kits to really pop, but in doing so I get such overwhelming bass guitar sound that gets very muddy. I listen to rock and alt rock (foo fighters, incubus, kings of Leon, oasis, alt nation on sat radio) and dabble in '98-2002 era rap that I used to listen to.

Let me know of any recommendations you all might have. Thanks, I appreciate it!

Edit: 2006 e91 with hi-fi and idrive and Bluetooth but no setellite or iPod hookup, leaving me with mp3 DVDs and aux input(my only way to have an eq to my sound).

[nato-main-man-5am]

Most people seem to low pass the underseats at about 175hz and high pass the doors at about 190hz, 12 db slope for each.

[taibanl]

I wouldn't recommend underlapping or overlapping the Midbass/Midrange cross. Anywhere btw 150-200hz should be fine, depending on specific drivers and taste. I don't know much about the R4's FR, but the SSMB8 can play almost up to the 500hz range. I have my SSMB8 crossed at 200hz and I don't notice any negatives about the soundstage being drawn down or muddiness. So I'm happy with that. However, there might be some MS-8 trickery that keeps my soundstage in tact. Try 150 and 200 see what you like better, maybe something in-between.

[nato-main-man-5am]

Originally Posted by taibanl

I wouldn't recommend underlapping or overlapping the Midbass/Midrange cross. Anywhere btw 150-200hz should be fine, depending on specific drivers and taste. I don't know much about the R4's FR, but the SSMB8 can play almost up to the 500hz range. I have my SSMB8 crossed at 200hz and I don't notice any negatives about the soundstage being drawn down or muddiness. So I'm happy with that. However, there might be some MS-8 trickery that keeps my soundstage in tact. Try 150 and 200 see what you like better, maybe something in-between.

Good advice. What slope do you recommend?

With the MS8 in line, I assume you disable the crossovers in the amp, and do it all in the MS-8 before it gets to the amp?

That's a little different than the OPs system since he is crossing over in the amp and doesn't have any dsp.

[taibanl]

Originally Posted by Nathan_h

Good advice. What slope do you recommend?

With the MS8 in line, I assume you disable the crossovers in the amp, and do it all in the MS-8 before it gets to the amp?

That's a little different than the OPs system since he is crossing over in the amp and doesn't have any dsp.

I am not an expert on slopes and I am not one to try EVERY conceivable combination (just merely many combos). So I run 24dB slopes between mid bass and front stage as per AndyW's recommendation. This reduces driver interaction apparently as well as the fact that 12dB slopes induce a phase shift at the cross point (I am merely echoing this, as I don't completely understand it).

Technic however runs 6dB slopes, for blending sake. I don't notice any LACK of blend in my front stage FWIW. I'd be anxious to hear his car though if I am ever in SFLA.

Yes, thats a correct assumption, but I think it makes no difference for a NON Ms-8 system. The FR of the drivers should be the same, except for the MS-8's imaging tricks, which are based of the rear speakers anyway.

[kayza]

Thanks everyone for your input. My amp crosses at 12db slope, and I set the xover at 150hz and it sounds much better, combined with my turning down the sensitivity a bit for the under seats. That was likely the muddiness I referred too. Was simply boosting it beyond the balance it needs with the dls set.

Additionally, I now have the front signal powering the under seats at ch3-4 of the amp, and the rear channels powering the front L/Rs on amp input ch1+2. Rear speakers disconnected. This allows me to have my PDC beeping from the front L/R and as a bonus I can now use the fade as a makeshift volume controller for the under seats. Just send the fade to the front to attenuate the front L/R and essentially get a bass boost for when Dr Dre comes on lol. I will eventually order y splitters so that I can bridge the under seats.

That or put a sub in the underfloor cargo storage area of my e91 to make use of those currently unused watts. Too bad the only custom box I know of for that is the bsw one at $700+. Any thoughts on a cheaper solution for a 10-12" sub in that area? Also, the xd600/6 would be throwing 200w@4ohms to it (150@8), so it may be difficult to find a 4ohm?

[taibanl]

If you have an iPhone Jl audio has a JL tools app that you can use as a free dB meter to level match your fronts with your under seats at ear level.

VP Electricity corner enclosure with an ID10 will handle 200w fine (2 ohm)