I have been running a blaupunkt head unit, with pioneer front speakers, and the stock fronts in the rear.

I have recently bought a set of MTX crossovers and tweeters and infinity kappa mids. I plan on putting them up front and moving the pioneers to the rear.

I will be running these speakers off of the headunit, and have a sub to bring up the low end.

My question is do I need to put bass blockers before the crossovers of the comopnants so I dont blow them out? Ore will the crossovers do that for me?

I plan on running bass blockers on the rears.



thanks
-Ted

 

IMO, bass blockers aren't really that great. They are just simple 6db octave capacitor that goes inline with the speaker wires. You'll attenuate the frequencies only a tad bit.

Example:

Say at 100hz (midbass), your speakers are putting out about 110 decibel. At 50hz (bass), its putting out 104 decibel. Therefore it is equivalent to having four times less power at 50hz. So it's comparable to having 100w at 100hz, but only 25w at 50hz.

It'll help, but not much for what you pay. If you can, I would highly recommend you make your own 12db octave passive crossover. Using the same method (inline with speakers), you can get a 6db octave capacitor and a 6db octave inductor to get a 12db octave slope. So intead of 104db at 50hz, it's approximately 98db.

But if you just need to get rid of some bass, then the bass blocker should work alright.

 

So the crossover from the components wont block any bass correct?

 

It will block bass, but very little. Only 6db octave worth. If you just want a bit less bass from your speakers right now, then the bass blocker will do. If you want to greatly reduce the bass, as much as say an amp's xover will, then you'll want to make your own or find someone that will make one for you.

 

No, the crossovers will not high-pass the signals to the component speakers. You need an active/electronic crossover and separate amps for that. Or you can try building a 12dB/ocatve high-pass filter yourself.

 

Thats what I thought, what would it take to build a 12db X-over?

An inductor and a capacitor was mentioned above, but wouldnt the inductor block the high frequencies I want?

 

It depends on how you wire the two together.

Here you go.

http://www.partsexpress.com/resources/xover.html

 

Thanks, that really helps me out quite a bit.

thanks
-Ted

 

Parts Express has got pre-built X-overs you could use. Here's their 80Hz 12dB/octave high pass filter. You'll need a pair of them.

 

What good are the crossovers that come with components then?

 

The ones that comes with the components Highpass the tweeter, and Lowpass the midrange, but it doesn't highpass.