3 Preouts for my hu...but why??

[Big-Cat 10+ year member]

ok, i'm gonna be getting a system with in the next 3 weeks. I've got my subs picked out, my amp picked out, and everything accept for my hu. I'm getting 15's, and i figure it'll drown out the mids-highs and i'm gonna get some 6x9's later, when i get the money. But, i've been told by local places around here that i need a hu with 3 preouts. Isn't the preout for the speakers?? So i figured that if i only get 6x9's for my back, the subs then i'd be set, as far as an amp goes.... So why do i need the 3 preouts?? i mean...i want a deck with a mp3 player because it'll save a ton of money on CD's for me, and i also want the 3 preouts because i was told i need them by a lot of people. But if i can save like 100 or so bucks on the 3rd preout and just get 2, for my 6x9's and my subs...then wouldn't that work? //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

-Big-Cat

Click to read more...

 

[dr. no 10+ year member]

No, preouts don't go to the speakers, they are signals that go to external amps. If you ever want to power your mids/ highs with an amp other than the one in your head unit then trust me it's a lot better to get a deck with 3 preouts. That makes it easy cause the front and rear chanels can still be faded and the 3rd set is non-fading for your sub amp.

 

[LuRp 10+ year member]

yeah.. im running 3 amps with 2 preouts.. its a pain.. i recomend u get the 3 pouts... its save u hassle in the future

 

[Unregistered]

Chances are you're going to want all three sets of pre amps. One will probably be a NON-fade sub out which will be nice for the amp, it will allow for a more limited frequency range straight from the headunit, it also will not allow for signal fade and your amp won't have to work as hard. Also the it will be helpfull if you decide to go with an A/B class amp with no x-over. The other two will probably be adjustable for mid/high useage if you do indeed decide to add seperate amps for components. Head units usually will have a set number of preamps so you can't just add and remove how many sets you get with the headunit as to sway the price one way or another. So if the headunit you like has 3 pairs then you're going to get three pairs.