sundown 100.4 setup

[alexj01_83 6]

I just purchased a sundown 100.4. I'm going to run 6.5's in the kicks and two 3 inch mid ranges in my front pillars. I am going to band-pass channel's 3&4 with the subsonic filter set at 150 hz then setting the Low pass frequency crossover at 4,500Hz for the 6.5. Then channels 1&2 would be set on High Pass and the High Pass Crossover set at 750Hz for my pillars.

I will also be running tweeters, those will be running on channels 1&2 also, but those will have a passive crossover set at around 5khz. This is just a rough draft.

Now I was wondering can I use my o scope to setup the crossover network. The dials don't have any accurate marks neither do they click. How will the Switch with 12dB and 24dB Octave selection affect tuning?

Has anyone ever ran Tweeter Lamps I was thinking about it, or should I stay away from them. I'm not going to any sq comps or anything this just for listening pleasure, learning experience, and a much needed up grade. Any HELPFUL comments or suggestions are welcome . Thanks

Edited January 20, 2010 by alexj01_83

[Impious 1,476]

I am going to band-pass channel's 3&4 with the subsonic filter set at 150 hz then setting the Low pass frequency crossover at 4,500Hz for the 6.5.

The highpass seems too high, and you are not going to want to run a 6.5" driver up to 4.5khz.

Then channels 1&2 would be set on High Pass and the High Pass Crossover set at 750Hz for my pillars.

Why are you planning on using such a gigantic overlap in frequencies between the midbass and midrange?

Now I was wondering can I use my o scope to setup the crossover network.

No, an o-scope won't be of any use for setting the xover frequencies.

The dials don't have any accurate marks neither do they click.

Hitting exact frequencies really is not important. Don't go into it thinking you need to set the crossover to "X" frequency. Finding "X" frequency doesn't matter.

What is important is the sound. That's the only thing that's important. If that means you set the lowpass for the midbass at 540hz instead of 750hz, so be it. Base your crossover settings on the resultant sound and not an arbitrary frequency. If knowing your crossover frequency is really important to you, you could figure it out with a DMM, test tones and some basic math after you have the crossovers set to where they sound the best. But I honestly wouldn't worry about it.

How will the Switch with 12dB and 24dB Octave selection affect tuning?

A steeper slope will change how the driver reacts with a given crossover frequency and the interaction of the drivers around the crossover point.

Has anyone ever ran Tweeter Lamps I was thinking about it, or should I stay away from them.

It's used to protect the tweeter. Some crossovers have them, some don't. It depends on whether or not you want or need to protect the tweeters from being overpowered.

[alexj01_83 6]

I am going to band-pass channel's 3&4 with the subsonic filter set at 150 hz then setting the Low pass frequency crossover at 4,500Hz for the 6.5.

The highpass seems too high, and you are not going to want to run a 6.5" driver up to 4.5khz.

midbass

Then channels 1&2 would be set on High Pass and the High Pass Crossover set at 750Hz for my pillars.

Why are you planning on using such a gigantic overlap in frequencies between the midbass and midrange?

mids They just had a very broad freq range and I wanted to start from there and adjust accordingly

I will be running two in each pillar to handle the power and to drop them to 4ohms.

Thanks for the other info, I guess just working on motors and such sometimes when u adjust things you want them to be precise or know exactly what your specs are. but i will loosen up lol.

[KU40 173]

Agree with Impious. What are you going to run to cover the 150 hz and down? Do you have a midbass driver? I would not recommend running a subwoofer that high. If you don't have a dedicated midbass, I would suggest a different 6.5", one that can at least go down to 80 hz.

[alexj01_83 6]

Agree with Impious. What are you going to run to cover the 150 hz and down? Do you have a midbass driver? I would not recommend running a subwoofer that high. If you don't have a dedicated midbass, I would suggest a different 6.5", one that can at least go down to 80 hz.

What would you suggest? Who makes a decent one? The Pyle pro I selected could probably go that low, it's rated for 450 watts. By far I'm not going to be pushing that much. I'm still open to suggestions.

Edited January 21, 2010 by alexj01_83

[KU40 173]

Power handling does not mean a driver can play low.

Are you stuck with a 6.5" for midbass or can you go up to an 8"? What is the maximum mounting depth you can have?

I would also suggest a lowpass crossover on those 3" mids if you hadn't already planned one, up in the 3-5 khz range depending on your tweeters. Just like we have suggested not overlapping the midbass and mid, we wouldn't recommending overlapping the mid and tweeter.

[alexj01_83 6]

Power handling does not mean a driver can play low.

Are you stuck with a 6.5" for midbass or can you go up to an 8"? What is the maximum mounting depth you can have?

I would also suggest a lowpass crossover on those 3" mids if you hadn't already planned one, up in the 3-5 khz range depending on your tweeters. Just like we have suggested not overlapping the midbass and mid, we wouldn't recommending overlapping the mid and tweeter.

no i wouldn't mind going with an 8" i should have plenty of room its a nice size car. i have seen little bit smaller cars with 10" in the kicks

Understood I just meant if I didn't drive it too hard it should be fine. I've been surprised on numerous occasions of how a speaker sounds in the right enclosure. I'm sure u have also.

That's where a processor would come in huh I have but so much flexibility with the crossover on the amp. What is the negative affect of to much overlap? If the speakers are capable of clearly reproducing the freq is it still bad??

Edited January 21, 2010 by alexj01_83

[Impious 1,476]

What is the negative affect of to much overlap? If the speakers are capable of clearly reproducing the freq is it still bad??

Generally undesirable. Multiple drivers playing the same frequencies will create constructive and destructive interference which can wreak havoc on the frequency response. And if the drivers time arrival is different it can create issues with imaging, etc.

[alexj01_83 6]

What is the negative affect of to much overlap? If the speakers are capable of clearly reproducing the freq is it still bad??

Generally undesirable. Multiple drivers playing the same frequencies will create constructive and destructive interference which can wreak havoc on the frequency response. And if the drivers time arrival is different it can create issues with imaging, etc.

I see now why you guys advise a two way setup, much easier to setup the first time.