2 15" L7's not loud enough!!

[diminishedpower 10+ year member]

hey, anyone else noticing its 4gauge power and ground, thats just starving the amp and causeing more resistance, i would def do 2 or even 0/1 gauge, and im in iowa, i wana hear these bad boys, lol

 

[Justinh722 10+ year member]

hey, anyone else noticing its 4gauge power and ground, thats just starving the amp and causeing more resistance, i would def do 2 or even 0/1 gauge, and im in iowa, i wana hear these bad boys, lol

I actually reasearched online about this amp thinking the exact same thing you are. The manual says 4 gauge, and theres actually only 4 gauge terminals on the amp. I might eventually end up going with 2 gauge and maybe getting a reducer in the future, but if Planet Audio says 4.....then i'm guessing that thats sufficient.

What town/city in Iowa u from.....I'm currently in Hampton......28 miles south of mason city.

 

[singlesubsetup 10+ year member]

I listen to rap.....all rap. I have tuned high before with 2 12" L7s and didnt get great frequency response much below that......40 hz tune. For some reason.......it seems to take more power from my electrical when the higher notes hit. 2000 watts should be plenty for these subs; they should also be much louder than they currently are. My 2 12" L7's on a 800 watt concept were kinda close to the output of these.

hearing goes down to 20hz anything lower CANT be heard. Raps powerband is between 30hz and up...

IF you've tuned to 40hz a 40 hz tune will play to about mid 30's before the speaker starts to unload... So if you were able to detect the difference in the music by say less than 10hz, your awsome dude //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif I personally cant hear the difference.

No it takes LESS power @ 50 hz to reach xxx.xx db (lets stay with 140) than to reach 140db @ 20hz... Think about it why do you need MORE power for subs than for midrange or tweets??? the higher the freq the less power you need to make it loud... Why do people in spl contests tune high(ish)? cause its easier to get loud at 40 -50hz than to do it @ 20hz...

And you have 4gauge wire for a 2k watt amp? What's the total amount of the fuses rated at the back of that amp?

 

[Justinh722 10+ year member]

hearing goes down to 20hz anything lower CANT be heard. Raps powerband is between 30hz and up...
IF you've tuned to 40hz a 40 hz tune will play to about mid 30's before the speaker starts to unload... So if you were able to detect the difference in the music by say less than 10hz, your awsome dude //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif I personally cant hear the difference.

No it takes LESS power @ 50 hz to reach xxx.xx db (lets stay with 140) than to reach 140db @ 20hz... Think about it why do you need MORE power for subs than for midrange or tweets??? the higher the freq the less power you need to make it loud... Why do people in spl contests tune high(ish)? cause its easier to get loud at 40 -50hz than to do it @ 20hz...

I have heard over and over again that it does take less power for the higher frequencys. But im my vehicle....the lights dim very very bad and my voltage meter drops down to 12 when I hit notes in the 50 range.....but when i'm in the 30's and low low 40's.....it maybe drops to 13 or so with the lights dimming moderatly. Weird....I know.

The box that I tuned to 40 was actually quite small and did play a role in my low frequency extention.

 

[diminishedpower 10+ year member]

im in desmoines area, and no its just standard to have 4ga input becasue most people break it off of bigger wire to many amps so the 4 ga isnt that long, and trust me, even pushing a true 1000 watts ur starving ur amp with 4 ga, upgrade, weres that chart that shows amps vs. wire gauge vs. length, anyone know, just to show that 4 ga isnt sufficient

 

[Justinh722 10+ year member]

I'm gonna eventually upgrade my wiring anyway. I have seen that chart and I was strongly thinking of upgrading before I bought the amp. I may be starving it, but it should still be VERY loud.

 

[diminishedpower 10+ year member]

that all depends, but ya it should be decently loud even after it being strangled by the wire, theree might be numerous things all working together to not be so loud

 

[singlesubsetup 10+ year member]

im in desmoines area, and no its just standard to have 4ga input becasue most people break it off of bigger wire to many amps so the 4 ga isnt that long, and trust me, even pushing a true 1000 watts ur starving ur amp with 4 ga, upgrade, weres that chart that shows amps vs. wire gauge vs. length, anyone know, just to show that 4 ga isnt sufficient

I'm with you on this one... are you sure thats there rms rating(2kwatts) or there MAX rating... 4 gauge is normally good for UNDER 2k watts... my hifoncis is rated @ 1600 watts and it has 4gauge power and ground... also my fuses are "2" 80 amp fuses (160 amps max current draw)

Also you have a serious voltage drop for some reason... Is your battery new? Is it the stock battery? Is it deep cycle? more info please //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Justinh722 10+ year member]

I'm with you on this one... are you sure thats there rms rating(2kwatts) or there MAX rating... 4 gauge is normally good for UNDER 2k watts... my hifoncis is rated @ 1600 watts and it has 4gauge power and ground... also my fuses are "2" 80 amp fuses (160 amps max current draw)
Also you have a serious voltage drop for some reason... Is your battery new? Is it the stock battery? Is it deep cycle? more info please //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Brand new battery.....1 week old. It's not a deep cycle, wish I had the funds for a yellow top optima but I dont. Alt is only 100 amps so thats a big factor.......still dont have the funds for a bigger one. I only have a 100 amp fuse on my 4 gauge because I cant find a bigger maxi fuse. The amp pulls 175 amps from the electrical.

Amp is actually rated 2250 watts MAX at 1 ohm......people bench em at; or a little over 2000 watts.

Listening at high volumes for more than 3 minutes will fry my fuse because it's only 100 amp.

 

[bimma85 5,000+ posts]

I have a maxi fuse block with a 100 amp maxi fuse. Amp pulls 175 amps.....currently waiting for a bigger fuse block. Anyone know what im doing wrong?

If he were truly sending his speakers anywhere near 2k watts at say 14v. Would a 100 amp fuse withstand that? Maybe this is just another case of me looking at #s too much //content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif .

 

[JoseMCeee 10+ year member]

maybe because the box is made big for "Street Bass" that the tuning has to be higher to match the size? These things should pound extremly hard. I doubt your deaf. Cuz these things will shake the crap out of your car if properly installed.

Or maybe you just need to put some Pastor Troy in your cd player //content.invisioncic.com/y282845/emoticons/naughty.gif.94359f346c0f1259df8038d60b41863e.gif

 

[singlesubsetup 10+ year member]

Brand new battery.....1 week old. It's not a deep cycle, wish I had the funds for a yellow top optima but I dont.

The deep cycle would help ALOT... does'nt even have to be a "yellow top" when funds allow get the biggest cheapest deep cycle you can fit. ( I don't have a yellow top I have a blue top oribtal 3 years old noooo problems)

Alt is only 100 amps so thats a big factor

not a big factor imo.. with 100 amp alternator you'd be fine, your first move should be the battery

The amp pulls 175 amps from the electrical.

That's more than what is rated for 4gauge wire look at the charts here

Amp is actually rated 2250 watts MAX at 1 ohm......people bench em at; or a little over 2000 watts.

yea 2250 MAX? not good, with the amount of amps your drawing your doing UNDER 2k watts .. those subs are probably getting UNDER 1k watts each //content.invisioncic.com/y282845/emoticons/crying.gif.ec0ebefe590df0251476573bc49e46d8.gif

1) when funds allow upgrade your wire, (just go straight to 1/0 guage)

2) get a deep cycle,

3) tune higher

4) and MORE (usable) power...

 

[Justinh722 10+ year member]

I will definitly look into some deep cycles then. I know that I have seen numerous people on the net benching the planet audio amps to do almost rated power......so maybe im getting 2000, maybe im not. I know that i'm probably not seeing what my amp can do since I dont have a deep cycle and i'm running 4 gauge wire.

I really dont want to mess with the tuning considering I have the notes hitting right where I want them. I'm definitly gonna re-wire eventually and get a bigger fuse block to hold a bigger fuse.......Would a 175 amp fuse be alright considering that is what the current draw from the amp is?

Thanks for all the help

 

[CutlassKnockin 10+ year member]

The deep cycle would help ALOT... does'nt even have to be a "yellow top" when funds allow get the biggest cheapest deep cycle you can fit. ( I don't have a yellow top I have a blue top oribtal 3 years old noooo problems)


not a big factor imo.. with 100 amp alternator you'd be fine, your first move should be the battery

That's more than what is rated for 4gauge wire look at the charts here

yea 2250 MAX? not good, with the amount of amps your drawing your doing UNDER 2k watts .. those subs are probably getting UNDER 1k watts each //content.invisioncic.com/y282845/emoticons/crying.gif.ec0ebefe590df0251476573bc49e46d8.gif

1) when funds allow upgrade your wire, (just go straight to 1/0 guage)

2) get a deep cycle,

3) tune higher

4) and MORE (usable) power...

Are you serious? The battery has almost nothing to do with his voltage drops. The battery is used to start the car and to ground the eletrical system once started. Unless you are playing your system withe the car off, don't worry about the batt right now. Second, obviously the 100 amp alt. is not getting the job done if you are getting bad voltage drop. That means its pulling more current than the alt. can handle. You need to upgrade that as soon as you can. Also, The 4 gauge will only carry up to about 1350 watts for a 15 foot run so if it is about that length then that is all the power you can get out of your amp. Upgrade that. Dont tune higher unless you are unhappy with the sound or the frequency curve. If it sounds alright just not loud enough then dont worry about it. The size of the box should be fine as well. It has to be something else or maybe it is just the voltage drop that is starving your subs from power.

 

[IgnoreMe 5,000+ posts]

If Im not mistaken, bigger box means more impedence rise. It is possible that your impedence rose through the roof?

nope aqueak12 actually bigger box, higher tunings, and smaller port area can all help lower impedance rise

btw to the poster: something has got to be wrong, 2 15" l7's you should be going nearly deaf lol. i think im gonna keep my stereo down a little, i had my first real sign of hearin loss today with my sx's haha, i might be in for a downgrade. supposedly runnin 2 15" l7's is like running 2 18" round subs...should be pretty ridiculous considering i run 2 round 15's and that subs can really hurt ya