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View Full Version : How low is too low for component passive x-over?



groggy23
04-29-2007, 12:35 AM
I plan on tuning my front stage next week when my kick pods are done. It consist of a DLS UR36i set running passive. Tweet/mids will be mounted on-axis, mid-bass flush in the door, apereodic enclosure. As of right now I have it set at 80Hz @ 18dB slope via x889 HU, amp is set to full mode. The mid-bass freq. range is 50-5kHz w/ a Fs of 70.5 Hz, here are the details specs: http://www.dls.se/en/car/prod.html?produkt=en_429
Temporarily I plan on running soley on front stage, meaning no substage. So I'm considering in going as low as around 60Hz or 70Hz with a 12dB or 18dB or 24dB slope are my choices.. Just would like to hear some thoughts. TIA.

dleccord
04-29-2007, 01:18 AM
depends on how loud you want to listen them too. you can cross them lower if you want to listen to them at a moderate level but if you're feeding them a lot of power, then cross em higher.

Johnny Drama
04-29-2007, 01:20 AM
My midbass drivers are crossed at 50hz...with a 24db slope.

Its really up to what they can take. IB in doors and they may not like it as low as in a set of sealed kick pannels. Try 60hz and if that doesnt work out, try 80hz with a lower slope.

groggy23
04-29-2007, 01:27 AM
Okay, they are in an apereodic enclosure. I'm gonna work my way down until they start to distort or the panels start to resonate. I figure 60Hz w/ 24dB is a good starting point.

jacka
04-29-2007, 06:08 AM
Mines at 63 with a 24db slope

IgnoreMe
04-29-2007, 04:11 PM
Okay, they are in an apereodic enclosure. I'm gonna work my way down until they start to distort or the panels start to resonate. I figure 60Hz w/ 24dB is a good starting point.

thats basically your only choice. no one except someone with experience with that particular setup can tell you whats the best range. the best way is to use those ears and turn the crossover down until you hear them bottoming out or distorting.

HitManSE
04-29-2007, 04:23 PM
Very much depends. If I turn my substage off, I can cross mine as low as 40hz with a 24db slope (via the amp) and it will play down to the 30hz range (lower actually) without distortion.

That however is a low volumes. If im going to be turning it up considerably louder, I wouldnt go much below 60hz/24db. Even then, you migh get distortion (depending on how loud you turn it up) It'll be trial and error until you set it to whats right for you.

Even then if you switch from one type of music to the other, it will chance what its limits are. I can play rock/metal type music considerably longer, louder and at a lower hz setting then id attempt to play any rap song. Its just something you'll probably have to mess with depending on what type of music you'll be playing.

Gary S
04-29-2007, 06:12 PM
If you have no sub, run them full range... otherwise you will have no bass. Just go easy with your volume control.... it's easy to do... you don't drive all over town with your gas pedal stomped to the floor.

headless
04-30-2007, 12:42 AM
I'd go with 60hz/24db as a low point - if they are a nice set, you could likely get away with 50hz/24db.

slick rick
04-30-2007, 12:45 AM
My germs can run full range at full tilt..but each mid is only getting around 60 watts. :)

headless
04-30-2007, 04:51 PM
I dare you to run 300w a side and try them full range :-P (if you do, please be sure a camcorder is present)

slick rick
04-30-2007, 04:57 PM
Haha 60 per side is plenty for me sir. :)

groggy23
04-30-2007, 05:17 PM
lol 300 seems a tad much. I used to run just 50w and it was plenty loud for me, and this is 3-way set mind you. ;)

headless
04-30-2007, 05:54 PM
bah nonsense. My 4150xxk (birthsheet 4x180w @ 2 ohms, rated 4x160w@2ohm or 2x320w@4ohm) can't even handle the Germaniums bridged y0 for realz, about an hour and a half of solid playing at reasonably high volumes and that sucker is hot enough to fry an egg on. It's gone into protect twice in the 4 months or so i've had it now due to heat. Ima bolt a bigass fan on it. My lights dim without any sub in my car at all. I really like the Germaniums. I think the Power Line CS 275's on 2x300-400w would be pure ****ing glory... THEY NEED MORE POWWWAAAAARRR </arnold>

One of these days i'm going to deaden my doors.
Cackle.

phyphoestilic
04-30-2007, 05:57 PM
****, mines set at 100hz @24db slope. Maybe I should try lower. lol

headless
04-30-2007, 06:00 PM
If you're running some Germaniums, I'd say yeah you should try em lower :-P I hated the sound of my sub playing up to 100hz...if your fronts can handle the output then you will probably like it much better with your crossover point @ 80hz rather than 100. I ran my Germaniums @ 50hz/24db for about a week between subwoofers while being sparing with the volume nob and they sounded great.

phyphoestilic
04-30-2007, 06:02 PM
im running some morels, my sub's are cross'd at 80hz @ 24db and my midrange 100 @24db. maybe I'll move it to 63 @24db and 80 @24

groggy23
04-30-2007, 06:44 PM
I'm running DLS UR36i 3-way set. Pushing 180w per channel via 4050xxk. They really like power, but not too much. Smaller voice coil allows for efficiency.

Currently 60Hz @ 18dB and it plays with authroity, especially with some nine inch nails tracks. I like it loud but not concert loud. :)

headless
04-30-2007, 08:07 PM
I'm running DLS UR36i 3-way set. Pushing 180w per channel via 4050xxk. They really like power, but not too much. Smaller voice coil allows for efficiency.

Currently 60Hz @ 18dB and it plays with authroity, especially with some nine inch nails tracks. I like it loud but not concert loud. :)

Rockin. The Germaniums midbass didn't 'come into it's own' on my admittedly ****** install under i started throwing >120w a side at it. The 4150xxk was the second biggest difference i've ever heard in my car by simply swapping out a single piece of hardware - right behind the Germaniums in the first place ;)

///M5
05-01-2007, 02:20 AM
Mine are at 40hz with a 12db slope, I'd go lower but they can't take it. Lower is better always in my book, beware without proper deadening and installation you will have a natural roll off that is much faster than the slope of your crossover anyway.

djdilliodon
05-01-2007, 03:52 AM
Before i sold my SI i could run my setup full range on the midbass drivers with a 12db slope no prob even at high volumes. The midbass drivers where sealed though. I use the same midbass drivers with a 2" mid/tweet in a home setup sealed at .35 cubic feet on 230x2rms and run them full range just before clipping with no prob either :) I think i have a vid of the midbass drivers IB run full range off 90w rms. Ill try looking for it and will post it :)

djdilliodon
05-01-2007, 03:56 AM
Oh wow i found it lol http://s129.photobucket.com/albums/p202/djdilliodon/?action=view&current=es-06video.flv and yes with more power i have gotten them to move more:up2somet: