where to buy passive crossovers?

Can any one help me! where do I go on the web to buy passive crossovers (HP) in uk. Ho do I select the correct crossover for my speakers? They are Alpine SXE-1325S and the manufactures web site is no help at all.

If it is a component system then the passive crossover should have been included with it. If ya lost it go to an alpine dealer he will be able to get ya the correct crossover. But if you are building a custom set then the passive crossover must be custom made for your system.

these are the speakers: http://www.lowcostcaraudio.co.uk/shop/Alpine-SXE-1325S-SXE1325S-Speakers_productJJ1456ZZcategoryJJ/speakers/Alpine/ They didn't come with any crossovers, and i cant find any ref to any Made by Alpine specificall for the job. So If I have to make them I will. But I'm struggling to find a step by step guide to taylor making some. Can any one point me in the right direction? Cheers

Those are coaxial speakers, not components.  They do not use seperate crossovers, the crossovers are built into the speakers (you should see a small capacitor soldered to the tweeters).My ex once told me I have a perfect face for radio.

there is a built in crossover for the tweeter, but the mid steel gets full frequency. Is it not a good idea to filter the low Freq out for that?

That's filtered by the high pass crossover in the amplifier.  Should be good to go at 100 Hz and up, or even possibly as low as 80 Hz.Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

These speakers are driven off the head unit. Only my Sub is amped up. If I adjust the EQ of the head it effects the sound on the line-out to the Sub also. So I cat adjust it there. Which is why I think I need to filter!

Thanks geepherder I'm heading in the right direction now. This tells me what I need to know: http://www.partsexpress.com/resources/xover.html If I want to cut out the frequencys below 150Hz. I will need First order - 265.3uF second order - 187.57uf, 6mH Would you recomend first or second order for my application? Second has the steeper slope i believe. Cheers

Yeah, I always prefer the steeper cutoff point when possible (second in your case).  I think that's why the bass blockers use such a high cutoff point- they've only got a 6 dB slope.My ex once told me I have a perfect face for radio.