Inexpensive 4/3 ch Amp suggestions

[backroad101]

Ok, I need suggestions on a cheap 4 channel amp where ch 1 and 2 will power some 5X7s and ch 3/4 can be bridged to power one 8in sub.

I am building something similar to one of these and am looking for an inexpensive amp. I've seen Boos and SoundStorm on Amazon but dont know anything about them.

http://media.photobucket.com/image/C...Picture122.jpg


My other option would to use a head unit (I already have) to power the 5X7s and use a 2ch amp I already have to power the sub.

Thoughts?

[Thed]

Depends what you define cheap as... $100?

[backroad101]

under $100, new / used / refurbished. Keeping an eye on ebay but want to see if anyone has suggestions

I have the cooler, found 5X7s, an 8in sub and amp kit for $80 total. So I just need (besides misc materials) an amp, battery and an on/off switch (I think that's all I need, will see when I dive into it)

[backroad101]

So if I run a head unit (to power the 2 6X9s) and a 2ch amp (which I already have) to power the 8in sub, will that draw a considerable more amount of juice from the battery as opposed to running just a 4ch amp (without a head unit) and just hook an ipod to the amp input. Either way I need to buy either a head unit or a 4ch amp, just trying to use as much as what i already have an buy a little as possible

http://www.gtcharlie.com/2007/2007_0...6-5688_IMG.JPG

[shane96ranger]

I bought an amp from a place on Ebay called Ike Sound. Awesome place to deal with. They have an Ebay store, and their own webpage. They sell new and refurbished amps for really great prices.

www.ikesound.com/4_channel

[wr250rdr]

as possible as it is to do it that way.. i wouldnt recomend that at all.
for a few reasons...
If you run a 4 channel with 3/4 bridged and just run the imput the sub will be very shallow and you will probably underdrive your sub and melt a voice coil.
A head unit, even a cheepie, will give you alot of tunability and will really provide you with a better sound.
the power draw from a head unit isnt that major along with an amp.
You can pick up used head units cheep on craigslist. i might even have a newer pioneer unit laying around that i would be willing to send you if you pay shipping on it that would have ipod capability if you order a cable from pioneer. and it will power speakers with no problem.
Also check your local best buy, tis the season for new models and the old ones, at least down here, are dirt cheep same with the floor models.

if you want to put together a complete package a company out here called Sonicelectronix.com has just about the cheepest prices i have ever seen and they do free shipping on all orders.

in my truck i just upgraded to an alpine head unit with Kenwood and have had kenwood door speakes, a cheepie rock foss 2 channel amp and a kicker 10 and it sounds great and it was all for under 400 because i bought at the right time.

[backroad101]

The headunit route is the route I am leaning toward. Been watching Craigslist. That and a battery are the only things i still have to get.

Cooler - Already had, 60qt Rubbermaid with wheels http://www.kaboodle.com/reviews/rubb...-cooler--60-qt.

Speakers - 2 Pioneer 6X9s I already had that I was going to put in the truck Got some 5X7 for truck so using the 6X9s for this project. Plus the 6x9s have grills, the 5X7 do not

Sub - JBL 8in from Amazon. Being shipped

Amp Kit

Misc materials

Head unit and Amp - pending

So far I am $120 into it (if you figure in the cost of the 5X7s) and still need a battery and headunit/amp. The Pioneer 6X9s are "300w" max. Will a headunit properly run those and sound good or should I get a 4ch amp to run all 3 speakers?

[509lifted]

ur talking 300 max so ur lookin anywhere from 50 to 75 rms so yes a head unit will push them fine if u have a decent deck and it is set up right

[RangerSVT]

Originally Posted by wr250rdr

....you will probably underdrive your sub and melt a voice coil.....

I hate to tell you, but there is no reasonable way you can melt a voice coil by "under powering"...Don't know how you came across this info, but they are blowing smoke up your a$$ and don't know $h!t...
As far as the op's question, amps like Sony, mtx, and kicker are decent amps in a decent price range. Walmart has a decent 4 channel Sony that's 100 rms watts x 4 channels. I would run the front channels to the highs and mods (parellel the left two speakers on the left channel, the right two on the right channel) then bridge the rear channel to the sub. Running this way the amp will be running at a 2 ohm stereo load on all four channels (providing the sub is single voice coil and not dual). The amp might run a little warm, but will not run hot (unless you play at high levels for a consistent length of time), so amp placement where airflow can reach is necessary. Under a seat is fine, in the corner behind the folding jumpseat is not...

SVT

[backroad101]

Originally Posted by RangerSVT

I hate to tell you, but there is no reasonable way you can melt a voice coil by "under powering"...Don't know how you came across this info, but they are blowing smoke up your a$$ and don't know $h!t...
As far as the op's question, amps like Sony, mtx, and kicker are decent amps in a decent price range. Walmart has a decent 4 channel Sony that's 100 rms watts x 4 channels. I would run the front channels to the highs and mods (parellel the left two speakers on the left channel, the right two on the right channel) then bridge the rear channel to the sub. Running this way the amp will be running at a 2 ohm stereo load on all four channels (providing the sub is single voice coil and not dual). The amp might run a little warm, but will not run hot (unless you play at high levels for a consistent length of time), so amp placement where airflow can reach is necessary. Under a seat is fine, in the corner behind the folding jumpseat is not...

SVT

This is going in a cooler, not the truck

http://www.gtcharlie.com/2007/2007_0...6-5688_IMG.JPG

Same cooler, layout will be different

[backroad101]

Got a Sony headunit and an 4 ch Alpine amp this weekend off craigslist for under $100 total. The Alpine amp is actually exactly like the one I already have that is going in the truck soon. Ch 3/4 are bridgeable to power the sub. The head unit is pretty new (still available new) Just had to get the harness off eBay)

Dug through my stuff this weekend to see what else i could use and found some Blaupunkt 4X6s i forgot I had that I will use as well as speaker grills for them and the 6X9. Also found all the cables I needed as well as an extra car kit for my portable XM radio. Feels good to find a good use for this stuff.

So my plan is to power the 4X6s off the head unit, the 6X9s and 8in sub off the amp. Also going to get some fans and build a snorkel for cooling

Battery suggestions? Don't think there will be room for a full sized car battery. Are there smaller cars that use smaller batteries?

[RangerSVT]

You can get some batteries used for backup power supplies. You can also use the batteries out of the emergency lights located in commercial buildings that come on when a power failure occurs. Some of those are 6 volt batteries, you will have to get 2 and wire in series to give you 12 volts, but they will work, and they are small. Depending on how long you want it to play, you might need multiple batteries...

SVT