Amps for 2 12 Kicker L7 Subs

New member

Username: Homegrowncam

Watauga, TX
United States

Post Number: 1
Registered: Jan-05

Posted on Thursday, January 20, 2005 - 05:17 pm:

Alright so here is the deal I have 3 Jl Audio 8w6's in a sealed box running of a Infinity Kappa 202a Amp and I have a Kenwood KDC-319 head unit with a Kenwood 6042 11 band equalizer and I am going to be adding 2 12" Kicker L7 subs to it and I am going to be putting them into two separate sealed boxes. Now I know the RMS for it is like 750 watts for one but what would be the best amp to run up to it?And would it be better to run separate amps to each one for better power?

Silver Member

Username: Taylor17

Kopperl, Texas

Post Number: 150
Registered: Jan-05

Posted on Thursday, January 20, 2005 - 07:34 pm:

Gitting 2 amp's won't help that much, so if I wher you I would git 1 class D amp.
For 750 rms each I would go with amp's like
Rockford T1501
Hifonic 1500D
or the Mtx... for get what it is called but it is somthing like Mtx1501D
They are all grate amp's

Silver Member

Username: Lbeckner

Tulsa, Ok
Usa

Post Number: 213
Registered: Oct-04

Posted on Thursday, January 20, 2005 - 08:56 pm:

get kicker amps for the l7's. i have the mtx 1501d on 2 l7's and i think they are underpowered.

Silver Member

Username: Taylor17

Kopperl, Texas

Post Number: 160
Registered: Jan-05

Posted on Thursday, January 20, 2005 - 09:21 pm:

Really! That's weerd!
I'am not a big fan of Kicker though.

New member

Username: Homegrowncam

Watauga, TX
United States

Post Number: 2
Registered: Jan-05

Posted on Thursday, January 20, 2005 - 10:31 pm:

Hey thanks alot!I was checking out the highfonics and mtx one but I cant find anything on the rockford, but it is bad to put too much watts to the subs, right?

Silver Member

Username: Taylor17

Kopperl, Texas

Post Number: 161
Registered: Jan-05

Posted on Friday, January 21, 2005 - 05:16 pm:

Ya it can cause a lot of damage to the voice coil's and a lot of other thing's. With the amp's I mintioned each sub will git 750 watt's rms.
The Rockford amp is more expencive, so for the price you would do better to get thehifonics, unless you have a lot of money to throw around, or you are like me and just like Fosgate's stuff!

New member

Username: Homegrowncam

Watauga, TX
United States

Post Number: 3
Registered: Jan-05

Posted on Friday, January 21, 2005 - 06:31 pm:

yeah so when i look at the sepcs on the amps I am looking for 1500 watts rms or peak power?oh yeah and taylor fosgate is some good stuff!

Silver Member

Username: Lbeckner

Tulsa, Ok
Usa

Post Number: 216
Registered: Oct-04

Posted on Friday, January 21, 2005 - 09:24 pm:

my mtx 1501d birth certificate says 1079 watts rms @ 12v. i don't really understand this cause i thought it was going to be 1500 watts.

Donald Byrum jr

Bronze Member

Username: Byrumjr

Post Number: 31
Registered: Jan-05

Posted on Friday, January 21, 2005 - 10:19 pm:

Most amp are rated @ 14 Volts. It makes the number look higher. However the power is there at that volts. Some are rated @ 12 Volts. Most electrical system run from 11 Volts to over 14 Volts. It has a lot to do with size alternator. All ways go by RMS watts.

Jonathan

Gold Member

Username: Jonathan_f

GA
USA

Post Number: 3042
Registered: May-04

Posted on Friday, January 21, 2005 - 10:47 pm:

The 1500 watts the MTX is rated at is 14.4V dynamic power. The 12V is considered the RMS power. The amp will put out over 1500 watts, though, with the right current supply, which most factory alternators can't provide in the first place. Also, remember that you have to double the power to create a 3db increase. So even if you compare two 1500W amps and one is a little underrated, you really won't hear a huge difference between the two.

Silver Member

Username: Lbeckner

Tulsa, Ok
Usa

Post Number: 219
Registered: Oct-04

Posted on Friday, January 21, 2005 - 10:55 pm:

what is dynamic power?

Jonathan

Gold Member

Username: Jonathan_f

GA
USA

Post Number: 3045
Registered: May-04

Posted on Friday, January 21, 2005 - 11:12 pm:

In MTX's case, it's more of a transient RMS rating. It's a shaky phrase to talk about, but all in all it means if you give the amp 14.4V, then it will put out 1500 watts. Other companies that are less reliable will list dynamic power as more of a peak rating, you have to be careful when going by those specs.

Silver Member

Username: Lbeckner

Tulsa, Ok
Usa

Post Number: 222
Registered: Oct-04

Posted on Friday, January 21, 2005 - 11:25 pm:

What is transient RMS then? So this amp is capable of 1500 watts clean power? If only I could get steady 14.4v. My voltage gauge bounces around alot. I also have a MTX 564 wich is 560 watts \ 4. How big of a HO alternator do you think I need? I plan on getting a 5 farad cap. Some guy at the stereo shop told me that a BatCap is what I need, but it didn't look like much. Sorry to steal you thread cameron.

Jonathan

Gold Member

Username: Jonathan_f

GA
USA

Post Number: 3048
Registered: May-04

Posted on Friday, January 21, 2005 - 11:32 pm:

You need an alternator, with the regulator set at 14.4V. MTX's dynamic power rating is really a RMS rating, it's just considered "dynamic" because most cars can't provide a continuous 14.4V signal. So yes, that amp can put out 1500W RMS when given power to do so. As far as the alternator, depends on the vehicle you drive, but you'll need around a 200A most likely. Get the alternator first, then a capacitor and battery.

New member

Username: Homegrowncam

Watauga, TX
United States

Post Number: 4
Registered: Jan-05

Posted on Saturday, January 22, 2005 - 12:48 am:

thanks alot guys this is all good info!so i would be straight if i got the Mtx1501D amp and I had clean source of 14.4v?will i need a cap for this or would it be fine to run this off my distrabution block?and right now with my 3 jl w6s and my infinity amp i use 2 gauge for the wires, will i need to go bigger when adding this to it?