Hi all,

I have tested tweeter locations and angls and have found a great place for them but when i installed them there i was limited in the amount of angling i could do (not much) and there fore did not achive the result i wanted!

Would it be a good idea to buy another set of tweeters and install them some other plase but with the original angling? Would it improve the sound stage? Can i connect them in parallel with the 2 way setup i already have?

Thank you.
Gena

well, it may help, but IMO it's a bandaid fix for the problem you already realise (lack of angling).

for SQ, most setups utilising 4 tweets still rely on a set of 'main' tweets that are critical for soundstaging and imaging (so for L/centre/R and depth). in most cases, these tweets will be in the kickpanel; but as you have found, angling is very important for their optimum function.

the use of addition tweets then becomes for the purpose of stage height, where they function as 'ambient' tweets, and often mounted up high on the dash. they are heavily attenuated (dropped in volume/output) so that they provide only subtle cues rather than impact heavily on soundstaging.

so, unfortunatlely, i would rather suggest to you to modify your tweeter installation if you can. is this not possible? coz once you have the fundamentals right, you may find you don't need ambient tweets after all.

in terms of running extra tweets, you cannot simply run them in parallel with the main tweets if it's a passive xover setup. powering them off a separate amp is fine (with the appropriate xover). however, adding them in parallel will change the overall impedence being fed off the original passive xover; if both tweets are 4ohm, then that becomes 2ohm. the xover frequency point of a passive xover is dependent on the impedence, amongst other things. so if you alter it from 4ohm to 2ohm, the xover point completely changes (depending on xover design, it would approximate a xover frequency twice as high which would be audibly obvious and adverse). plus the electronics in the passive xover may not be able to handle the higher power (at high volumes) associated with the lower impedence.

so i don't think it's as simple as you may wish.

Not only will the crossover frequency go higher but the ratio between the coils and caps changes also, so even if you wanted the frequency the crossovers will be out of spec and not sound very good at all.

Im running two tweeters per side. both in the same location. However i made some 24db octave crossovers designed to run at 3ohm. Both tweeters are 6ohm. Sounds very nice.

Why cant you angle them any more? if it is because the angle mounts dont angle enough, then maybe use a wedge of MDF to angle it a bit more. and screw that into your kick panels. Painting the mdf will make it look pretty concealed.

Or just make some new kicks out of fibreglass.

I made a mistake of cutting up my door trim in order to fit them in and now i can not move them from the door as it will leave a hole in its place!

And i was thinking of using another tweeter with its own pasive xover, would that work ?

I will try and angle it a bit with something but i don't think it will work very well, but trying will not kill me i guess

i'll see what i can do....
10x for your help

Gena

I have a similar poblem to you. I mounted my tweeters up high on the door closest to the upper front corner. The door curves inward a bit so the directiong of the tweeter faces the opposite side door a bit more then half way. It is relatively simple tho to fix it. I will be buying some MDF (12-18mm) and place it over the whole with it (wedged) so that it angles the tweter more. Its relativly simple if your good with jig saws and sanders. If you find making the angle you need to hard, simply make the angle as much as you can and then place another wedge shaped peice ontop of that, then cut the same size whole you did in your door and your fine! I havent attempted this yet but will when I get my new splits.

When your finished simply sand it down, paint it with a few layers, sand again and paint with a very fine layer one more time, and finally gloss coat it or something, thus achieving an attractive, not out of place fix for your problem. Shouldnt take over an hour or 2.

let us know how you go