spl amp good for dual l7’s?

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=103259
Printed Date: June 10, 2024 at 5:00 AM

Topic: spl amp good for dual l7’s?

Posted By: sg300m
Subject: spl amp good for dual l7’s?
Date Posted: March 20, 2008 at 7:07 PM

i got two Kicker L7's/ ported box, is the SPL FX1-5500D good enough for the L7's???

                                               ::::INFORMATION::::

- FX1 Series 1-Channel Class D Car Amplifier
- RMS Power Rating:

    * 4 ohms: 1700 watts x 1 chan.
    * 2 ohms: 2500 watts x 1 chan.
    * 1 ohm: 3200 watts x 1 chan.

- Max power output: 5500 watts x 1 chan.
- Fully regulated PWM Power Supply
- Wired remote bass level control included.
- LED power and protection indicators
- Tuned Bass EQ (0-18 dB bass boost)
- High Speed Digital Circuitry
- Single channel operation
- Bridging Synchronization
- System distress indicator
- 4-Way Protection circuitry
- Mono speaker output connector
- Nickel Plated Heavy Duty Power & Speaker Terminals
- Phase Switch 0-180
- Variable low-pass filter (50-150 Hz)
- Subsonic Filter (15-40 Hz)
- Frequency response: 15-150 Hz

-------------
-TheFamous

Replies:

Posted By: jmelton86
Date Posted: March 20, 2008 at 8:57 PM

What is the model # of the subs? More preferably, what is the impedance of the voice coils -they will either be dual 2 OR dual 4ohms each-?

L7's are rated for up to 750watts RMS, each. So, if you have the dual 4ohm versions, you could wire the subs in series/parallel (for 4ohms) and give each sub about 850watts. This will be okay considering the box is properly designed (and built...), the gain adjustment on the amp is set carefully, and you know how to not jack the volume up.

I, personally, would run the amp @ 4ohms. The amp will run cooler; making for better effeciency (better on your alternator) as well as longer life.

-------------
2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001

Posted By: klctexas
Date Posted: March 21, 2008 at 8:59 AM

Actually, the 12" L7s are rated for 750rms and 1500peak. The 15s are rated @1000rms/2000peak. And I do agree about the idea with running the amp at four ohms, it will run better and cooler, and not risk overheating, and jmelton is also right in asking whether they are 2 or 4 ohm subs. They come in both configurations, and this will determine the final load on the amp, and therefore, how much power you will be putting to them. If you did choose that amp, and had it wired to 2 or 1 ohms, keep the gain down low, or you'll risk blowing your subs with way too much power.

-------------
Soldier: This is the worst part. The calm before the battle.
Fry: And then the battle is not so bad?
Soldier: Oh, right. I forgot about the battle.