How do i get full power out of my kenwood kac-1520s amplifier hooked up to two 12" audiobahn 400 watt subwoofers

The Kenwood KAC-7252 and KAC-9104D are both great amps, but they have different strengths and weaknesses. The KAC-7252 is a 5-channel amp that can output 75 watts per channel at 4 ohms. It also has a built-in crossover and time alignment, which can be helpful for getting the most out of your woofers. The KAC-9104D is a 4-channel amp that can output 100 watts per channel at 4 ohms. It also has a built-in subwoofer output, which can be used to power a separate subwoofer.
If you are looking for an amp that can power all of your speakers, the KAC-7252 is a great option. It is also a good choice if you want an amp with built-in crossover and time alignment. However, if you are looking for an amp that can power a subwoofer, the KAC-9104D is a better choice. It is also a good choice if you want an amp with more power output.
Ultimately, the best amp for you will depend on your specific needs and budget. If you are not sure which amp is right for you, it is always a good idea to consult with a professional car audio installer.
Here is a more detailed comparison of the two amps:
Kenwood KAC-7252

• 5-channel amp
• 75 watts per channel at 4 ohms
• Built-in crossover and time alignment
• MSRP: $399

Kenwood KAC-9104D

• 4-channel amp
• 100 watts per channel at 4 ohms
• Built-in subwoofer output
• MSRP: $499

I hope this helps!

Is the sub dual voice coil?

Kenwood KAC-9104D

Product Features

• Mono subwoofer amplifier
• 500 watts RMS x 1 at 4 ohms (900 watts x 1 at 2 ohms)
• Variable low-pass filter (50-200 Hz at 24 dB per octave)
• Bass boost (0-18 dB at 40 Hz )
• Subsonic filter (15/25 Hz, 18 dB/octave )

This amp is stable down to 4 ohms bridged at 120 Watts or 2 ohms stereo at 60 Watts X 2. If you are going with the bridged mono hookup just make sure the impedance of your subwoofer is no less than 4 ohms. A good rule of thumb is to be at least double of what your amps rated output power is. So if your amp can put out 120 Watts into 4 ohms then get at least a 240 watt subwoofer.


Do not exceed the rated load for your amp, you will damage it. Here is the datasheet for your amplifier

http://manual.kenwood.com/files/B64-3031-00_En.pdf

No, your not over powering your L7, your underpowering your subwoofer.
Your Kenwood is
500W x 1 at 4ohms [20-200kHz 0.5% THD]
900W x 1 at 2ohms [100Hz 1.1% THD]
Your L7 is:
Max Rec Amplifier Power (WATTS PEAK/RMS)* 2000/1000But its ok for your subwoofer, alteast your not giving it to much stress. But personaly, get another mono amplifier that would match your subwoofers rating.

That is pretty much saying that the amp's power supply is shorted or at least has a low resistance path to ground which is causing the fuses on the amp to blow. The amp has protection circuitry to prevent damage to the output stage so that is not what is causing this. Is the amp new?

Hello crobins2,

The Kenwood KAC-6202 2-channel is only rated for 60 watts RMS per channel into a 4 ohm load. That just isn't much power for a pair of 12" subs. Even the bridged output is only 200 watts into 4 ohms, still at the low end for a sub, much less to share between a pair of subs.

Assuming that your subs are 4 ohm, you could probably get more sound by driving just one of them on the bridged terminals. But to get the best power with what you have, connect one sub to each channel, set the filter switch to the far right (LPF), set the operation switch to stereo (both channels driven), set the filter frequency (Hz) to 100 or lower, and adjust the input sensitivity as far clockwise as possible without causing distortion.

But, to do the subs justice, you really need at least 300-400 watts to share between them.

Hope this helps.

your amp is blown up

That amplifier is only stable to 2 ohms.
You will only be able to use one Dual 4 ohm Subwoofer wired in parallel (all + to + on amp.... all - to - on amp.
This will yield a 2 ohm mono load.

It is impossible to wire (2) dual 4 ohm voicecoils to achieve a 2 ohm mono load.

If you're set on using both subwoofers - they will not be getting as much power from your amplifier with a 4 ohm load - but it is your only option.


SEE THIS LINK for the wiring diagram.

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your amp may have burned out or try checking the fuse in the amp and the car also your channels may be burned or you may jus have water damage to the amp