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Avinash094
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Need car audio advice

Postby Avinash094 » November 21st, 2017, 7:29 pm

Hey fellas

I have a 4 channel amp, 2 channel for mids and 2 for bass
Im currently have 2 8" for mids and wanted to add 2 drivers (selenium 220ti)
Hpf from the deck is set at 100hz and the drivers spec sheet says minimum hpf is 1500hz
Im hooking them up in parallel
What resistors should i use on the drivers without damaging them?
Or what is the best way to hook it up?

Any help would be greatly appreciated

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kavaninho
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Re: Need car audio advice

Postby kavaninho » November 21st, 2017, 11:29 pm

resistors will just attenuate the amplitude, you're looking for a capacitor to add some form of passive HPF

Avinash094
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Re: Need car audio advice

Postby Avinash094 » November 22nd, 2017, 3:09 pm

What size capacitor should i use and where can i get?

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ruffneck_12
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Re: Need car audio advice

Postby ruffneck_12 » November 27th, 2017, 8:48 am

use a 12uF non-polarized capacitor
(just tell them you want to use it for music)
http://www.apicsllc.com/apics/Misc/filter2.html
I used this calculator here, they said to use 13.25uF, but 12 is the closest size and it would protect the tweeter a bit more since the new cutoff frequency is 1650Hz.



And hook it up in series with the tweeter like this. Inline with the positive terminal of the tweeter.
Image


You could get it in steve's/sham's/any music store really.

Don't let them chain you up and give you the regular 2.2uF yellow capacitor. Your drivers wont play anything below 9000Hz and it will just sound like nails on a blackboard.

But if you can't get the 12, there's a way to combine capacitors to get the value you want, but I feel like this post is already too long so I'll tell you that if you cant get the 12 :lol:

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TK!
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Re: Need car audio advice

Postby TK! » November 29th, 2017, 2:15 am

recommend a passive. a capacitor alone on the mids and highs will not be enough. the 8" will see frequencies above what it can play and sound terrible. you can build or buy passive. involves knowing your speaker specs, designing the xover network, getting an xover or the parts, etc... google.

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