Subs w/out amp
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Freshman User
Joined: Mar 2004
Posts: 32
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From: Tioga, ND
Subs w/out amp
I'm installing some 8" mtx subs for my stepbrother, the stereo shop told him you dont need an amp for them, so do i run the wires from the subs to the outputs on the back of the cd player or to the speaker wires? or is there another way that your supposed to do it?..thanx
Lead Driver
Joined: Aug 2004
Posts: 5,326
Likes: 18
From: Gilbert
Good luck getting any juice to them. Go buy an inexpensive amp if price is an issue, anything is better than running straight off the deck. Not to mention you'll get voice through your sub, which will distort (and eventually kill) that sub real quick when you crank it up.
Junior User
Joined: Jan 2005
Posts: 79
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you have to hook it up to the speaker wires, there is only between 4 and 7 volts coming out of the rca's, if thats what your asking. runs suffiecent gauge wire from the deck to the subs, there gonna starve, get them all the current you can.
Postmaster
Joined: Aug 2003
Posts: 2,977
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From: South Texas
Originally Posted by Ford4x4CountryBoy
I tried talking them into buyin an amp but they dont want to..so i figure i'll just hook it up for him, so how would i hook it up.,thanx
Freshman User
Joined: Mar 2004
Posts: 46
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From: Lockport NY
Originally Posted by triton_2002
The shop didn't what to sell you an amp? Your kidding right? What kind of shop isn't going to what you to spend more money? You should have bought some 6X9's, probably would sound better than unamplified 8's.
it's gonna sound awful without! Why spend the money on MTX subs and not have an amp to push it! Hell, buy him one as a present or something!
Posting Guru
Joined: Jul 2004
Posts: 1,611
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From: Bored town OH
well its gonna sound bad, but just hook them up to the back left and right speaker wires from the CD player. is it a stock cd player or aftermarket? you really need to convince him to get an amp, tell him to go to www.etronics.com they have some dirt cheap amps there that will sound 10 times better than running the 8's from the cd player. they have amps for around 50 bucks, brand new out of the box too. and the kit to hook the amp up is only around 15 bucks i think.
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Senior User
Joined: Jan 2004
Posts: 269
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From: Central Ohio
It is certainly not the best thing to use subs without an amp, but it can be done. However, if you do hook it up to the HU directly you MUST use a passive "low pass" filter so that the subs are only getting the low frequencies and nothing else. And what is going to be used to amplify the "main" speakers? Your stepbrother realizes that these won't reproduce the full music spectrum, right? Sounds to me like the beginnings of a system for someone who knows nothing about audio, and thinks he's going to get some "thump" by doing this. Correct? He's in for a rude awakening. A HU will probably make those subs audible and little more. And I would find another shop to deal with.
P.S. If these 8" MTX subs happen to be amplified Thunderforms, then you don't need a separate amp. They have their own amp. You need to connect then to the HU using RCA cables. This is the only reason I could imagine a "shop" telling someone that they don't need an amp.
P.S. If these 8" MTX subs happen to be amplified Thunderforms, then you don't need a separate amp. They have their own amp. You need to connect then to the HU using RCA cables. This is the only reason I could imagine a "shop" telling someone that they don't need an amp.
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Elder User
Joined: Apr 2003
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From: Cheney, Wa
this is sooo wrong...and unfortunaley pioneer encourages with their walmart knock offs. when you turn the "sub output" on , on the deck it crosses the rear speaker output as well and they claim on the box and instruction manual it will run subs. sooo wrong, hopefully this mtx is in a full range truck box, but the only place i've seen those in the past couple years are pawn shops. sooo wrong i can't stress that enough.