4AWG wire on a MTX 81000D???

[db xTc]

what kind of current draw will this amp have? i realize that the amp accepts up 1/0 AWG power wire but is it really that important? all of my previous 1000+ watt amplifiers had 4 AWG connections. i couldn't see the MTX drawing much more than a d200hc or kicker xs100 class.

will using 4 awg effect the performance of the amplifier. it is going to be connected to a factory alt and one yellow top

[bebasshome]

Hello. I'm always willing to give advice to a fellow Pennsylvanian. Personally, I am also running the MTX 81000D...two of them. I didn't notice any real change in performance changing from 4ga, to 0ga. However, if your competing...every little bit helps. Since MTX was smart enough to add the bigger receptors on the amp...if you have the $$, USE them. Just my 2 cents.

Brian

P.S. MTX reccomends the amplifier have a 150amp inline fuse. I've found that it can draw at peak demands in excess of 190amps at 2ohms, at 13.2V.

[Bumpin' Yota]

<BLOCKQUOTE>quote:</font><HR>Originally posted by bebasshome:
MTX reccomends the amplifier have a 150amp inline fuse. I've found that it can draw at peak demands in excess of 190amps at 2ohms, at 13.2V.<HR></BLOCKQUOTE>


Considering that the max current for 4ga is 105amps over a 18', run the choice is elementary...1/0.


Now if you only had a 5' run that might be different....

Also you can purchase 1/0 for ultra cheap at a welding shop that will do just as well.

Steve

[nthemix2]

You don't need to run 0 awg all over the place, just under the hood down the side to a block.then...split off 2 or 4 awg to your amp.

Good Luck

MIX^^^ smile.gif

[cncguy]

MTX reccomends using 0 gauge wire. I run 2 which is fine...4 is kinda pushin it esp, the current it draws as the volume gets louder. My advice is go no smaller than 2. I also plan to buy another 81000D. Lemme know how 2 of these amps sound, db xtc!!! http://members.cardomain.com/sonja

[db xTc]

actually bassbehome i no longer live in PA but, i am sure that you would be willing to help another CC sale associate. what is your ibm and store number? i will be in touch.

i know that 4awg would be not ideal and i have access to low cost wiring and hardware. i am just being cheap and lazy because i allready have 4 awg ran in the car.
1/0awg is certainly better than 4 but i was just wondering why many other amps of similar power consumption utilize 4awg connections? are they assuming that the amp will be connected with a short section of 4awg from a distribution or fuse block and 1/0 from the battery to the block? or are the engineers designing inferior connections.

anybody know where 1/0 awg will go through the firewall of a 96 eclipse? i have only found one grommet on the passenger side i am not sure that it will fit without modification.

[db xTc]

<BLOCKQUOTE>quote:</font><HR>Originally posted by db xTc:
1/0awg is certainly better than 4 but i was just wondering why many other amps of similar power consumption utilize 4awg connections? are they assuming that the amp will be connected with a short section of 4awg from a distribution or fuse block and 1/0 from the battery to the block? or are the engineers designing inferior connections.
<HR></BLOCKQUOTE>


... by the way this statement is in no way an attack against maunufactur that using 4awg terminals.

[regal1975]

<BLOCKQUOTE>quote:</font><HR>Originally posted by db xTc:
actually bassbehome i no longer live in PA but, i am sure that you would be willing to help another CC sale associate. what is your ibm and store number? i will be in touch.


anybody know where 1/0 awg will go through the firewall of a 96 eclipse? i have only found one grommet on the passenger side i am not sure that it will fit without modification.<HR></BLOCKQUOTE>

hehe... man you need to watch the installers... get a unibit and go to town... :D ... sorry, we all gavew the salespeople hell when i worked at cc.. im a former installer there...good place to work though, i just needed more hours and sundays off.

thgouh i still wish i had had the money to get a few dozen 81000d's.... 181.. damn

[ 02-13-2002: Message edited by: regal1975 ]

[sherbhachu]

i am in the same situation, i will also be running 4AWG.

i have been told by almost everyone that thiss amp would only draw about 100amps when playin regular music (whatever that is), and will draw close to 200amps when playin sine waves, etc (i.e. when competeing).

so, if u r not gonna be competeing or not gonna have your system all the way up all day, just get 4AWG. but otherwise get AT LEAST 2AWG.

thats my 2 euro's.

[db xTc]

another question.

can i burp this amp with a 1 ohm nominal load? does power output increase at 1 ohm?

[bebasshome]

Db


My IBM#??? hehe...Come on now dude, you know we aren't supposed to allow another associate to use that. I work at the Erie Store Store#3744. What store do you work at? Personally, I think its great that the MTX designers, and engineers put 0ga connections on the 81000D. If you look at other amps of similar construction:

Earthquake D2, Zapco's 2000w monster, PA 2500D

You will notice that those amplifiers as well allow for the connection of 0ga wire. I'd say MTX engineers put the 0ga connections in the amplifier for competitors who require peak performance from the amplifier.

I personally have burped my 81000D's at 1ohm. in measuring them, I only noticed a 5% increase in power at 1ohm. However, since impedence of your woofers can rise dramatically in a ported enclosure, burping the woofers at a lower then reccomended frequency, is usually the best way to get power to them. For example...the impedence on my 8K series 15's is 4ohms each. I have 1 bridged per 81000D at 4ohm mono. However, at my burping frequency which is 52hz, the impedence rises to almost 6.2ohms.

My Shocker Xtreme 15 on the other hand, is a dual 1ohm woofer. I run that to both my 81000D's, 1 coil per amplifier. The nominal load the amplifiers will see...is .75ohms. However, when I burp once again at 52hz, teh impedence of the coils rises to nearly 3ohms. However, I am getting MUCH more power out of the amplifiers this way.

So, is it possible to burp your 81000D's at 1ohm? Yes it is

Is there a dramatic power increase? No

Would I recomend burping the amplifier at 1ohm for the mear reason that impedence rise will allow the amplifier to put out more power then it would if you just ran it at a 4, or 2ohm load? Yes.

Stay in touch

Brian

[cncguy]

Speaking of 1 ohm loads, I have mine running that now. And the amp hasn't strained yet. I bet to differ on the difference on the 2 ohm load to the 1 ohm load with the 5% increase. I swapped dual 2 ohm subs with a freind and noticed right away it wasn't as loud as the 1 ohm load, with the dual 4 ohm subs. I kept the dual 4's, and plan to buy another 81000D.
BTW, I dont plan to run 1 ohm for much longer. Don't want my amp to burn up, but its only 66 bucks for repair....but still, may have problems later down the road if I don't change it. http://members.cardomain.com/sonja

[Bumpin' Yota]

<BLOCKQUOTE>quote:</font><HR>Originally posted by sherbhachu:
i am in the same situation, i will also be running 4AWG.

i have been told by almost everyone that thiss amp would only draw about 100amps when playin regular music (whatever that is), and will draw close to 200amps when playin sine waves, etc (i.e. when competeing).

so, if u r not gonna be competeing or not gonna have your system all the way up all day, just get 4AWG. but otherwise get AT LEAST 2AWG.

thats my 2 euro's.<HR></BLOCKQUOTE>

*sigh* here we go again...

In case anyone hasn't noticed there are a LOT of songs that have hard bass lines. What are bass lines? They are usually one to several frequency waves played for a long duration. IE - they are SIGHN WAVES, the exact thing you compete with. OFTEN times these bass lines can extend for 10 seconds or more - faaaar more than you'd do for competing. In other words there is a reason mtx engineers put a 1/0 connection on it...

If your battery to amp run is 6 feet or shorter, you will get away with 4 ga. If it's longer you had better upgrade, otherwise you will kill the amp from voltage starvation.

There is a reason 4ga only is rated for 105amps over a 20' run at 12.5 volts.

I for one enjoy playing sine waves from time to time, but don't like the idea of a FIRE in my car either, so 1/0 it is....besides you can get 1/0 for stupid cheap at a welding shop.

steve

[1loud99stang]

I am a tech at MTX and i get this question about 4 times a day. Yes, you do need to used 1/0 wire! You can damage your equipment by not getting enough voltage or current. also when you do this it will send a distorted signal from the output which can damage your subs. Spend the extra $20-$40 and get the most out of your equipment. This is probly a good time to remind everybody that this is probly not the only amp in your systems. You will need to add in the current draw your other amps also.

[cncguy]

1loud99stang
Member
Member # 3828
Member Rated:

posted 02-15-2002 04:53 PM
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I am a tech at MTX and i get this question about 4 times a day. Yes, you do need to used 1/0 wire! You can damage your equipment by not getting enough voltage or current. also when you do this it will send a distorted signal from the output which can damage your subs. Spend the extra $20-$40 and get the most out of your equipment. This is probly a good time to remind everybody that this is probly not the only amp in your systems. You will need to add in the current draw your other amps also.
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Finally...an answer from MTX themselves. Hey loud whats up...this is also loud blazer. Hit me up on AIM whenever you can!!
Anyway, I typed above saying 2 gauge is the minimum I would go. MTX doesn't like that but its not their choice to buy wire...its the customers'. BUT I do see your point, loud, and so far my amp is running good with the 2 I'm using. Using 4 like I mentioned above will harm the amp....seems people dont care so why should I worry about their 81000D. http://members.cardomain.com/sonja

AOL AIM loudblzr