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Audiophile73
New member
Username: Audiophile73

Post Number: 4
Registered: 5-2004
Posted on Thursday, July 08, 2004 - 8:53 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

hey guys, i findally got my x-force 400hd, but theres only one problem, well i have a cobra 25 (not peaked and tuned just stock) wilson 1000 roof top, mounted in the center of my tahoe roof. All my jumpers are rg8x, but my amp dead keys at about 100 and swings to about 250 or so. So I am a little angry considering the specs said it would swing to 650 and dk at 350. I know its not gonna swing to 650 but i expected a little more than 250. The only thing I think it coulb be is my power wire. The amp is hooked up to a second batterie thats in the back of my truck. Its wired in series with the front one. But the wire connecting the battery is 120v house wire, its 4 gauge so its thick but its for house current. So why the heck does my amp which is x-force (who is known to be good) performing poopy. Any ideas pls let me know. Sorry for the long post.
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Alsworld
Advanced Member
Username: Alsworld

Post Number: 839
Registered: 1-2002
Posted on Friday, July 09, 2004 - 5:27 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Audiophile73,

I have a couple of thoughts on this.

1) Is your meter a Peak reading meter? It sounds to me like it's an RMS meter only and you are only seeing RMS power.

2) What kind of deadkey and PEP does your radio put out (with the amp off)?

3) Wired in series with your other battery, the amp may be starved for power. You say truck, how many amps does the alternator put out? What type truck? 4 gauge wire should be okay, but I've never seen 4 gauge wire in a house so I'm just curious about that.

Yes, that amp should put out much more than what you are seeing. Did you buy this new?

Alsworld
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Simpleman
Junior Member
Username: Simpleman

Post Number: 20
Registered: 2-2004
Posted on Friday, July 09, 2004 - 5:43 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Iam not a amp expert, but you have a high drive amp 4x2879.You dont have near enough radio to drive that amp. Alot of owners of that HD amp have a small amp to drive it.With that radio the X400 would have been a better amp. 1-2290/4-4879.
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Pig040
Intermediate Member
Username: Pig040

Post Number: 486
Registered: 7-2003


Posted on Friday, July 09, 2004 - 10:36 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Exacly right Simpleman, you have to figure a 2 dring 4 is hitting the 4 with about 60 to 80 watts, the radio is not near enough. I used to hit a 6 pill with a tweaked and peaked 2970, and still wasnt hitting it hard enough!
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Audiophile73
New member
Username: Audiophile73

Post Number: 5
Registered: 5-2004
Posted on Friday, July 09, 2004 - 11:45 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

I have a tahoe with a 100 amp alternator. The 4 gauge wire is for high voltage not low voltage. Thats what I say when I mean house wiring. So the copper strands are very thick. Somebody at Home Depot told me that that wire could not break down the current of a 12 volt. My friend ordered 1 to so were gonna hook his up in his truck and see if we get the same result. I just thought that the x-force amps suposavly being so good would put out a little more than that. Thi nking I should have gone with a texas star. Any help would be good, thanks again
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Dodgeman
Member
Username: Dodgeman

Post Number: 74
Registered: 10-2002
Posted on Friday, July 09, 2004 - 1:50 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Audiophile73 I have the 40012hd Base an I drive it with with a kl400 10 to 20 watts an see 500 to 1200 peak.As for wire some guy,s use welding cables that have fine strans of wires in them EZer to use.
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Audiophile73
New member
Username: Audiophile73

Post Number: 6
Registered: 5-2004
Posted on Friday, July 09, 2004 - 6:49 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

yeah I just don't understand why im only dead keying 70-80 and swinging to 200 250 at the most. Mainly just cause the website that i purchased it from said that it would swing to 650, i know it wont get that high but i at least expected it to swing to 4 or 500
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Alsworld
Advanced Member
Username: Alsworld

Post Number: 840
Registered: 1-2002
Posted on Friday, July 09, 2004 - 8:25 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

There is something wrong for sure as that X Force will easily double what you are seeing.

The wire? Maybe, as most high power car audio amplifier wires get very fine, sometimes the finer the better.

Have you bypassed the second battery (for now)and run it straight to the battery receiving the amps from the alternator?

Not trying to be insulting, but the truck is ON when you are testing this amp isn't it?

I still wonder what your radio does at it's lows and peaks by itself?

It still sounds as if the amp is either starving for power or being underdriven.

Let us know.

Alsworld
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409
Member
Username: 409

Post Number: 74
Registered: 3-2002
Posted on Saturday, July 10, 2004 - 2:45 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

More Drive !!!
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Bulldog369
Intermediate Member
Username: Bulldog369

Post Number: 118
Registered: 2-2004
Posted on Saturday, July 10, 2004 - 7:53 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

you need to put about 50-70 watts into that amp to get the full range out of it... just pushing it with a cobra 25 that maxs out at like 10 is not enough to drive that big box... if you put a ts mod v in line with it you will notice a big difference.
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Pig040
Intermediate Member
Username: Pig040

Post Number: 488
Registered: 7-2003


Posted on Saturday, July 10, 2004 - 10:32 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Audiophile,
Dont fret about the amp, you bought one of the most dependable amps on the market, you just have to hit it harder, if you do you will love that amp, no need to change amps, just give that sucker some drive!!
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Audiophile73
New member
Username: Audiophile73

Post Number: 7
Registered: 5-2004
Posted on Saturday, July 10, 2004 - 2:06 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

thanks thats what im gonna do, how hard can I drive it though, i was thinking of the texas star modulator or the xforce x-40 or x-80, would the x-80 be to much or no, thanks a bunch.
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477
Junior Member
Username: 477

Post Number: 39
Registered: 6-2002
Posted on Saturday, July 10, 2004 - 5:09 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

go for the Texas Star Modulator.
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Dodgeman
Member
Username: Dodgeman

Post Number: 75
Registered: 10-2002
Posted on Saturday, July 10, 2004 - 5:56 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Audiophile73 dead key about 2 watt into the driver you should see 10 to 15 watts out an no more then 20.Ten watts from my 2950 would DK 300 an swing to 500 without the driver.Hope this helps.The X 80 would make a good driver
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Simpleman
Junior Member
Username: Simpleman

Post Number: 22
Registered: 2-2004
Posted on Saturday, July 10, 2004 - 6:45 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Either one of the 3 will drive the X-force 400HD well. Watch that 100 amp alternator , the 400 takes a 100 amp draw by its self, depending on your driver it could be another 20 amps.
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Sparkomatic
Intermediate Member
Username: Sparkomatic

Post Number: 339
Registered: 10-2002
Posted on Saturday, February 19, 2005 - 10:56 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

You have to drive an XFORCE 400HD. My 400HD does nowhere near the rated "Undriven" wattages. Drive it with an X-80 and it with a peaked radio it will swing 1000 watts peak.....800-900 watts peak with an X-40.
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Hotwire
Member
Username: Hotwire

Post Number: 93
Registered: 1-2005


Posted on Saturday, February 19, 2005 - 11:15 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

He better upgrade on his alternater before ever thinking about that much wattage.
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Pig040
Advanced Member
Username: Pig040

Post Number: 697
Registered: 7-2003


Posted on Saturday, February 19, 2005 - 5:08 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

I was getting 1000 out of my X force driving it with a 2970, with the stock alternator, but an extra battery deep cycle, to help out.
Rich
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Hotwire
Intermediate Member
Username: Hotwire

Post Number: 101
Registered: 1-2005


Posted on Sunday, February 20, 2005 - 11:05 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Does anyone have a link showing how to run a second battery with your existing battery and alternator? I have a 100 amp alternator. I drive my 200 watt amp with 40 watts and get serious drainage. (ssb) AM not too bad. I would burn up my alternator using sideband. Pig040....HELP!!!
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Pig040
Advanced Member
Username: Pig040

Post Number: 699
Registered: 7-2003


Posted on Sunday, February 20, 2005 - 11:51 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

I can tell you how I did it. I ran wires directly from my battery in my truck (pickup) to the deep cycle battery I had in the back seat, and ran my amp directly off of that battery, and ran seperate wires from my vehicle battery directly to my radio. The deep cycle battery made the amp talk time a lot longer without power drop. Then once a week or so I charged the deep cycle battery with a deep cycle charger, just to increase battery life, if you dont do that the deep cycle gets a "surface charge", and shortens the life of the battery. I ran numerous linears, and radios like this and the deep cycle never went bad. It was a great setup for me. I ran this same system in two different vehicles a Dodge Dakota truck, and a Grand Caravan.
Rich
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Hotwire
Intermediate Member
Username: Hotwire

Post Number: 105
Registered: 1-2005


Posted on Sunday, February 20, 2005 - 6:53 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

OK Thats sounds easy enough. I imagine the heavier gauge wire the better. Looks like I might be spending some time at the drawing board now. LOL Thanks Rich

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