help with my amp/subs?

[kurtyboy 10+ year member]

Hey, i have a 4 channel lightning audio 1200w amp with 2 12" subs in separate boxes... for some reason, they sound really bad. my old 10" roadmaster subs from walmart sounded better. i had a sony explode 800w with my 10" and they sounded great. then the guy i got the amp from wanted to trade so he could have an "all sony" system so i figured it was a good deal and i was trading up. but with the new amp it didn't sound as good. and the new subs are even worse. wouldn't 12" be better than 10"? does this sound like a problem with the amp? also they make a rattling sound. i have noticed that when i unplug one of the rca plugs the remaining sub sounds great and doesn't rattle. but when i plug the other one back in, it just sounds crappy and they rattle again. i heard the subs when they were in the car from the guy i got them from and they sounded great. would bad wires cause this problem? sorry if i am not specific enough, this is my first time posting so ask any questions if you need.

Thanks so much.

Click to read more...

 

[stones 10+ year member]

Did you accidentally get the polarity reversed on one sub.

running both subs with one out of phase with the other will cause what you describe.

 

[kurtyboy 10+ year member]

you are talking about postive/negative (red/black) when you say polarity, right?

i have checked that several times over. i can't find any mistakes. the only thing i can think of it that i am wiring it wrong. the amp is has 4 channels...LR LF RR RF. i just hooked one sub to RR and one to LR and put the rca to LR and RR. is there a problem with that wiring? also, could the amp be giving too much/too little power?

 

[stones 10+ year member]

Are you using the amp to power just you're subs?.

Also what is the model of the amp, strike, storm or bolt?

 

[amedeuce 10+ year member]

what are the ohms on the subs dual 2 or 4 or single 2 or 4

 

[kurtyboy 10+ year member]

yes, i just have the subs on the amp. i didn't know if there was a different way to hook them up since it is 4 channel instead of 2.

i'm sorry but i don't know if they are 2 or 4 ohm. is that a necessary thing to know?

 

[amedeuce 10+ year member]

yes, i just have the subs on the amp. i didn't know if there was a different way to hook them up since it is 4 channel instead of 2.
i'm sorry but i don't know if they are 2 or 4 ohm. is that a necessary thing to know?

most definatly. that would be a great thing to know, especially when it comes to wiring them correctly

 

[amedeuce 10+ year member]

What are the subs you have. the name and model

 

[stones 10+ year member]

You're running them in stereo off of only one set of channels, you want to bridge channel A for one sub and then bridge channel B for the other.

Use a splitter on the RCA cords to get signal to both Channel A and B.

Bolt 75x4 @ 4ohms

100x4 @ 2ohms

200x2 @ 4ohms - 1200 Watts Max Power

Variable x-over from 40-400Hz

+12db Juice Boost Bass EQ

Pass thru ouputs

Chrome cover

 

[kurtyboy 10+ year member]

any suggestions on what to do about the ohms? i bought them used from a guy i know. i suppose i could ask him. but he is really hard to get a hold of. that is also why i can't ask him any questions

i know they are concept

 

[amedeuce 10+ year member]

any suggestions on what to do about the ohms? i bought them used from a guy i know. i suppose i could ask him. but he is really hard to get a hold of. that is also why i can't ask him any questions
i know they are concept

take them out of the box and look, sometimes it's written on there or get a DMM and read out the coil (s)

 

[stones 10+ year member]

Low end Concept subs are all 4 ohms unless they have Dual voice coils then they have 2 4ohm coils.

Wait... how old are the subs and what color is the cone?.

The newer lower end models have a silver cone and a 6ohm voice coil and the low end black cone have dual 4ohm coils.

 

[kurtyboy 10+ year member]

so if i go about bridging them then that would give them more power? would that solve the rattling problem? am i only getting half the power since i'm only using 2 of the 4 channels?

 

[kurtyboy 10+ year member]

i could go look now to find out that information if you don't mind waiting. i would appreciate it

 

[amedeuce 10+ year member]

so if i go about bridging them then that would give them more power? would that solve the rattling problem? am i only getting half the power since i'm only using 2 of the 4 channels?

might solve your problem, however if one sub is blown then that could be the rattleing or a crappy box with air leaks.