SQmonster

iTrader: (2)

I just changed my set-up to bring my sound stage up by putting my tweeters on my dash. Unfortunately, my whole sound changed in a negative way. My mids sound like shiz and my clarity is in the *******!

What is the best way to counter-act this?

macguyver

I personally have never found that placing a tweeter on a dash a large distance away from a mid ever did that well. If it were possible to make a tweeter play reliably under 1K, then it would be possible, as most aural cues are contained above 1K.

Staging is a funny thing, it's more art than science. What will work in a Honda won't work in a Chevy.

I'm personally a fan of having a mid and tweeter as close as possible. A rule I used to use was to keep the distance between them no more than 1/2 wavelength at the crossover frequency. So, the lower the crossover point, the farther apart, the higher the crossover, the closer together.

I've been a fan of coincident source for many years. You can't get any closer than that for distance, and natural time alignment to boot. If you have access to wizzy processing, then you can force the issue and time-align each individual speaker (if you have dedicated amp channels for each) as well as manipulate crossover points and slopes to offer the best protection to the tweeter as well as remove any passive crossovers (and their associated resonances, crosstalk, etc.).

If you are truly after SQ, look at dedicated amp channels for each driver (a tweeter is a driver, a mid, mid-bass, etc.), good crossover control and EQ, and time-alignment to help out when all else fails.

MTT

iTrader: (17)

what was said above,... as well as did you turn the tweeter level down at all after you put them up?, they are probably more on axis now than they were, did you try different positions before deciding exactly where to mount them?

AAAAAAA

iTrader: (7)

Try not pointing them at your face, also, try swaping the phase on em.

MTT

iTrader: (17)

you mean the phase on the mids?....I find you'd be hard pressed to ever be able to tell a phasing issue on a tweeter (unless of course it's crossed extremely low)

SQmonster

iTrader: (2)

I had gorgeous sound until I moved my tweeters from just below my midrange in my kick-pods to the top of my dash. I was just looking for a higher stage. Instead, I got confused sound.
I am running 3 separate amps for my 3 way front stage. I am using the Premier 800 PRS deck with time alignment. I have them crossed at 1.25hz.
I will try putting the passenger tweeter out of phase in an attempt to restore the acoustic phasing issue.
I also have another option that I haven't tried. I can have another pair of tweeters in the kicks in series with the dash. I've heard that this way of getting the best of both worlds has it's own rules to which I'm not privy.

MTT

iTrader: (17)

well there's your problem right there, even if you meant 1.25khz, is that not way too low?

...the big thing with "super tweeters" (two sets) is to cross the upper set very high

SQmonster

iTrader: (2)

You're right, I did mean 1.25khz...

I haven't tried to implement a second pair yet. I wanted to try to make these work first. I am using a pair of soft dome German made Digital Designs tweeters that can go as low as 800hz. The deck is limited to this rate for tweeters.

I've played a little more with the placement of them and have found that pointed straight up at the window seems to sound the best so far. I've also inverted them at the deck which also takes some of the confusion out.

I'm not looking to have overly bright tweets, I would like to have the smoothness that I had before, with better staging.

Sasha

iTrader: (10)

This thread has several pages of Scott Buwalda and npdang discussing crossover points. There are several pages, but this is where it starts. Interesting read, and both make good points. I buy Scotts arguments for in car crossover points.

www.diymobileaudio.com/forum/showthread.php?t=32824&page=5

Here is the highlight...

http://www.diymobileaudio.com/forum/showthread.php?t=32824&page=9

Sasha

iTrader: (10)

I would normally cross the tweeter over around 5khz in a two way, and even higher in three way, if the tweeters are up in the dash. Main reason is I want to keep the vocals frequencies confined to midrange and mids, instead of them being reproduced by tweeters. I feel, if you share the vocals between mids and tweets, you have two different sounds/timbres blending together, which I dislike. Plus, I don't like to hear the tweeter straining through lower frequencies, even the ones with low Fs. Anyways, depends on your taste. Usually, people cross between 2.2khz - 3khz, or 5khz - 7khz. But I havn't heard a tweeter that could play well crossed at 1.25khz - madness You say your twets can go as low as 800hz, that is probably rated Fs, and minimum, and I say MINIMUM, because I havent had good results even with this, you have to cross tweets at a frequency at least double the Fs. I do not think these tweets will play well below 2khz. Food for thought. But if you got three ways, why not use them as such?