HPF, LPF, amp or receiver.. or both?

[vandiar2 10+ year member]

^^^^^^^^^

was thinking about this today. usually I combine the effects of both and produce a good sound. heard someone say today though it isn't generally a good idea? how about everyone else, what do you do? thanks!

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[Horsemanwill 10+ year member]

i see nothing wrong with it.

 

[Hybrid90accord 10+ year member]

i have my amps on fullpass and all my signals are being sent from my headunit, but then again i am running active so...

 

[eharri3 10+ year member]

If it sounds good to you and it doesn't harm the equipment I don't see why any theoretical negatives really matter. Personally I was using the crossovers on the amps and finding I was still tweaking it after quite some time. Then I bridged my 4 channel to the front to feed my new Hertz HSK 165s and left my rear fill on the head unit. Had to start using the 80 hertz high pass in the head unit since I no longer have such controls on the rear using the amp and I found when running full range that the rears were giving out before the rest of the system due to the full range bass signal. I now find I have pretty much the effect I wanted without as much tweaking and fiddling. It removed one variable from the equation and all I had to do was find the right low pass for the sub for a good blend.

The only thing I can imagine is some who are really good at understanding and getting that perfect blend of crossovers and slopes might say this interferes with the natural 'roll-off' of the speaker but I would think if it's a situation where its fixed at the HU and amp but you want something steeper to get you the blend YOU'RE looking for then more power to you. I tried using both x-overs a few times after tweaking my fixed-slope amplifier for awhile. It seemed to clean up some muddiness in the 50-80 HZ region and give me that deep, rich, but clean sound I was looking for but at the same time I lost a bit of up-front 'kick' that I like.