Technical Crossover? Where in Marea...

[Treker]

So... where it is? Is it just a simple resistor or something better? (doubt that).
Thinking on changing tweeters and door spekers. I read that door will fit 16's. Gotta try that. Any info?

.

 

[whatoncewas]

Don't think there is a crossover.

The front driver and tweeter are basically wired in parallel from each of the L/R outputs of the head unit.

 

[TidyBoy]

the croosover is built into the tweeter.. is basically a resistor. is on the bravo so gota be the same im thinkin

 

[whatoncewas]

You're probably right TidyBoy, but then if the OP is gonna remove the stock tweeters it's easier to treat it as if there is no crossover.

The door's can fit 13" with adapter plates. 16" probably with some work. Or 5x7 ones as they are straight in. Infinity do some good 5x7 speakers.

HTH.

 

[ben]

I always wondered about this. I wanted to replace my fronts with components, but didn't fancy all that wiring... so its not possible to just replace the speakers and use the current wiring? If i want to do it, i gotta get the new crossovers installed?

 

[jbackg]

Hi, not sure about the cross-over in the marea and it is possible that the tweeters are wired in parallell however, a cross-over for the tweeter is not a bulky item and can be fitted in situ.

Simple version:
To separate the high frequencies a capacitor is placed in series with the positive wire before the terminal.

Full range Input O--------||--------O Hi freqeuncy Output

Typical values might be 2 or 4 micro Farads Polypropaline types work fine, if using electrolytics (not recommended) they must be non-polar.

http://www.maplin.co.uk/Products/Module.asp?CartID=040818134636135&ModuleNo=393&MR=N

or cheaper but....
http://www.maplin.co.uk/Products/Module.asp?CartID=040818134636135&ModuleNo=12777&MR=N

Complicated:
A capacitor is a frequency dependant resistor, the lower the frequency the greater the resistance. This is called reactance, or impedance.

A resistor is a frequency independant resistor and serves no purpose in a cross-over other than adjusting the amount of current seen by a loudspeaker.
(sensitivity matching)

An inductor, (coil) is a frequency dependant resistor. The higher the frequency the greater the resistance....etc.
Due to the powers in audio circuits coils need to be large. Capacitors are tiny.

A simple I C crossover is an example of a "first order" design. That is it reduces the output to each speaker by approximatey half for each octave.
(6dB/Octave) The point where the reducing low/high curves meet is called the crossover frequency. the response in a first order design is -3dB in both curves. -3dB + -3dB = 0dB (full power)

regards
James

 

[TidyBoy]

when i replace my front components i used the standard wiring for both woofer and tweater but wired the crossovers onto the existing wire which is there for the tweeters.

 

[DarkRoniN]

Don't think there is a crossover.

The front driver and tweeter are basically wired in parallel from each of the L/R outputs of the head unit.

Hi all,

I'm sorry for bringing up such an old topic, but it would help me to explain my question.
I'm installing a component set up front and I need to know where is the split point for the parallel connection - by positioning my passive crossover at that point I could use the original wiring.
alternatively can you guide me on how can I add a new speaker cable from the left tweeter to the HU?

Thanks alot