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Hey everyone, I really messed up the settings on my alpine M300 and I need some help programing it. I don't have any idea what many of these settings mean and would really appreciate it if you all could tell me the best settings for some of these options. If it matters, I primarily listen to rap and alternative.

Input Level : .5V/1.0V/2.0V/4.0V (0dB/-6dB/-12dB/-18dB)

Low Pass Filter : 30-200Hz

Subsonic Filter : 15-50Hz

Parametric Equilizer : Frequency 30-160Hz (1/3 oct. step)
Level +-10 dB(2 dB step)
Width 1/3

I would really appreciate your help with these settings, I can't seem to get them set to make my JL Audio 12w3 sound good. Thanks!

 
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Whats the preout voltage from your head unit..this will tell you what you need to set you "Input Level" to.

For the filter i would go between 80-125 depending how low your mids up front can play to. this you will have to play by ear

subsonic filter....do you have a ported box? If yes set this at your tuned port frequency. If not set it at around 30.

Im not sure on that parametric eq. It seems like a bass boost that you can vary the width of the boost and the frequency. Most boxes tend to roll off in 40-45 hz range...set it at around 45 hz. This will help boost the freqs that naturally get rolled off

 
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I have a ported box and the total output of my amp is 600w

 
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im not sure about the HU, I have an alpine 7893 if that helps

 
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Here’s a quick checklist for initial set-up (a little long but it works):

Mode 1: Input
1-1 Set the input SELECT to 2CH for nearly all cases. This will internally sum the left and right channels. Failure to do so can result in greatly reduced output with stereo bass recordings. The only reason to use 1CH mode would be if only one RCA connection is available, such as using separate left and right subwoofer amplifiers for stereo bass, or if the signal is already summed mono (e.g. using a processor with only one subwoofer output such as the PXA-H510).
1-2 Set the source level at the volume where you would like to achieve maximum output with the amp, using a recording with high average bass signal output. Also, make sure all subwoofer level controls and/or other up-stream signal adjustments (if used) are set to the maximum level. Then adjust the INPUT LEVEL to the setting where the input-clipping indicator (the decimal point after the last digit at the right of the amp status display) comes on occasionally. While this should also be the point where the onset of distortion becomes audible, it does not necessarily mean that the amp is delivering maximum power yet. Be patient and go through the rest of the setup, as the purpose to this setting is to apply the cleanest signal to the A/D converter at the front end of the DSP in the amplifier. If a very high bass level relative to other full range speakers is desirable, it will usually be best to turn down those gains rather than severely clip the amp’s input. In the special case where the amplifier is still not reaching maximum output soon enough, use the P.EQ to boost the output level (see Mode 4)…after going through the rest of the set-up.

Mode 2: Low-pass filter
2-1 Set to “ON” unless using an external crossover or processor.
2-2 Set to the desired crossover frequency.

Mode 3: Subsonic filter
3-1 Set to “ON” for most cases, especially when using vented box subwoofer designs.
3-2 Adjust to the desired cut-off frequency. Warning: Since it is possible to overlap the subsonic and low-pass filters, you may create a condition where amp will produce little or no output. Make sure that the subsonic filter frequency is significantly lower than the low-pass filter frequency, unless you have a very specific performance goal in mind.

Mode 4: Parametric EQ (P.EQ)
4-1 Set to “ON” for nearly all cases. The Parametric EQ is a valuable tuning tool, and is recommended for both personal taste and maximum performance. Most customers don’t appreciate a flat frequency response, and even if your particular customer does, they will still most likely want an imbalance in volume between the satellite speakers and the subwoofers.
4-2 Adjust to the desired frequency.
4-3 Set the width (Q) to affect the desired frequency range around the center frequency. For example, if you would like to boost frequencies between 45-75Hz, the bandwidth is 30Hz, which corresponds to Q=2 if the center frequency is 60Hz. Just keep in mind that higher Q is more narrow, and lower Q is wider. If an overall subwoofer level increase is required, it is advised to set the P.EQ to its widest setting (Q=1 for M300, Q = 0.5 for M500).
4-4 Adjust the level as needed for either boost or cut. Please note that it may be necessary to go back and re-adjust other settings such as input level at this point, depending on your tuning goal.

Mode 5: Bass Compensation
4-1 Set to “ON” for most demo board cases. This function is unique to Alpine (based upon MediaXpanderä technology), and basically restores or adds harmonic overtones in real time to the music. It is especially effective with compressed media, such as MP3’s. It will also have the effect of increasing the perceived bass level of normal recordings in most cases, but is much more than simple equalization. It should be noted however, that if engaged on already bass heavy music, it might have the effect of “muddying” up the bass in some cases. In general though, its use will be a matter of both personal taste and program material.