Component System Crossovers

[Schuby87]

When I bought my car the door speakers didn't work, so the other day I decided to investigate.

Apparently the previous owner had installed an Alpine Type-R SPR-17S component system. He did a real half ass job with it. He had the wiring wrong, routed weird ways inside the door, and had the wiring and crossovers in the way of the window glass.

The crossovers terminals are all corroded and almost look like they melted. They also have pieces rattling around on the inside.

I took out all that crap and just hooked up the 6 1/2 inch speakers, leaving the tweeter in there. I tested the tweeter and it will work if I have a way to hook it up. It sounds 100 times better as it is now, but I would really like to have the tweeters hooked up too.

Now my question is, can I just buy 2 crossovers? Everywhere I look you have to get the whole component system, but I obviously don’t need everything that it comes with.

[MP81]

You should be able to... I don't see why you couldn't just buy crossovers.

EDIT: I see what you're saying. You might have to contact some of the car-stereo shops, they might be able to hook you up.

[Schuby87]

I have talked to a few local car audio places with no luck.

I am thinking about just putting in some inline frequency filters. If I do this, does it matter if the tweeter is wired in series or parallel? I would want the impedance to be the same as the Type-R system. Does the crossover change the impedance with the 6 1/2 and tweeter hooked up? I know that the Type-R system has an impedance of 4 ohm, but I couldn't find anything about each individual component.

It might be easier to just use a crossover if I can find them.

[MP81]

I'd have to ask my dad, he might know.

As for what I'd think...Since a tweeter, technially, is still a speaker, thus having a given impedance value, that, yes, it could matter how it is hooked up. You're talking about a 2-Way speaker, right? Or do you have seperate mid-ranges/woofers and tweeters?

You said the speaker has an impedance of 4 ohms. That would lead me to believe that it is a 2-way speaker. A crossover shouldn't change the impedance...

[Schuby87]

I'd have to ask my dad, he might know.

As for what I'd think...Since a tweeter, technially, is still a speaker, thus having a given impedance value, that, yes, it could matter how it is hooked up. You're talking about a 2-Way speaker, right? Or do you have seperate mid-ranges/woofers and tweeters?

You said the speaker has an impedance of 4 ohms. That would lead me to believe that it is a 2-way speaker. A crossover shouldn't change the impedance...

No, the impedance of the whole component system is 4 ohms according to the Alpine website. I am assuming that means when they are hooked up, the 6 1/2 inch speaker, tweeter, and crossover have an overall impedance of 4 ohms.

I dont know how the circuitry in the crossover is wired to get the 4 ohm impedance. Depending if the crossover has the 6 1/2 inch speaker and the tweeter wired in series or parallel, that is how I would have to do it with the inline high and low pass filters.

[MP81]

Well, perhaps it says on the speaker and the tweeter what impedance it all is?

[Schuby87]

Well, perhaps it says on the speaker and the tweeter what impedance it all is?

Not that I saw. I guess its time to take off the door panels again and break out the multimeter.

[MP81]

Yep.

So it is a Two-Way speaker, then, right?

[Schuby87]

Yep.

So it is a Two-Way speaker, then, right?

Correct

[MP81]

Hmm, I'm guessing the multimeter is going to be the best way here...

[cobalt camaro]

All the crossover does is monitor the frequency levels. You send the crossover a full range signal and the crossover sends the lows to the 6.5 and the highs to the tweeter. That is about it, the advantage is that they play alot clearer, and it is kind of like hooking an amp to your full range speakers because crossovers only allow frequencies that each speaker can produce to be played. As for resistance look at it this way

equivalent resistance for parrallel components= 1/((1/R1)+(1/R2)) Where R1 and R2 are the resistances of the two components in mind.

Equivalent Resistance for series components =R1 + R2 where again R1 and R2 are the resistances of the two components being used.

Each of these formulas can be used with more components just follow the same form, for series add them all up and that's the resistance. for Parrallel it is 1 divided the inverse of each resistance added together. I hope this helps. If you don't know how to wire in series or parrallel then google it. Or ask me.

[SlyStoner421]

i have a set of type r crossovers at work...

[Schuby87]

All the crossover does is monitor the frequency levels. You send the crossover a full range signal and the crossover sends the lows to the 6.5 and the highs to the tweeter. That is about it, the advantage is that they play alot clearer, and it is kind of like hooking an amp to your full range speakers because crossovers only allow frequencies that each speaker can produce to be played. As for resistance look at it this way

equivalent resistance for parrallel components= 1/((1/R1)+(1/R2)) Where R1 and R2 are the resistances of the two components in mind.

Equivalent Resistance for series components =R1 + R2 where again R1 and R2 are the resistances of the two components being used.

Each of these formulas can be used with more components just follow the same form, for series add them all up and that's the resistance. for Parrallel it is 1 divided the inverse of each resistance added together. I hope this helps. If you don't know how to wire in series or parrallel then google it. Or ask me.

I am pretty familiar with what the crossover does, what parallel and series is, and how to wire them. What I was confused about is if the crossover has the 6 1/2 inch and tweeter in parallel or series. I want to have the same resistance as the system would with the crossover.

[Schuby87]

i have a set of type r crossovers at work...

Send me a PM if you are looking to get rid of them.