i once had a go at the xplod comps. theyr actually very good for the price they fall in. obviously if u can get XSGTX1622S in the range u have, theyr better since theyr the revised versions of the older XSGTX1620S.
ali bhai has said it correctly. some of the highs might fall in the midbass drivers range and u will hear them from them too. its better u get the tunnings done from a pro cuz the guys at shops (even the renowned ones) will always tune ur setup for spl. madhouse12 can help. also u can take a look at this
Step 1: Setting Volume and Gain Control
With your sound system off, disconnect the RCA cables that run to your amplifiers. Next, turn your system back on and turn the volume on your radio up to max, make sure no music is playing in the system. Disconnecting the RCAs makes sure nothing is playing through the amplifiers which would risk blowing your amplifier, speakers, subwoofers and eardrums. If your speakers run off of your radio and you have a subwoofer amplifier that your trying to set, disconnect all your speakers for safety, then reconnect them after you find the 75% volume level highlighted below. You can leave the speakers connected only if you are 100% sure no music is playing through your system. Most radios have a numerical association, for example the max volume could be denoted as “60” on the dial. The numbers for each radio differ; some might be at 10 max while others could be at 30 or even 100 max. Now that you have the max volume number, multiply it by .75, this will get you 75% of your max volume. For example, if our max volume is 60, then 0.75 x 60 = 45. Now that we have that figured out, turn your volume to zero and plug in your RCA cables or speakers if your running off the headunit. Now, turn the volume down to the 75% point (45 in this case) and turn the gain on your amplifier to zero. Set all bass boost and crossover filters to off, and make sure your headunits built-in EQ is set to “Flat”.
Purchase a CD with your favorite music and use it. With your sound system off, plug in your speakers if you disconnected them and RCA cables and then turn your system back on. Now start playing the tone, slowly turn the gain up on the amplifier until you hear distortion, also known as clipping. Back off the gain about 1/8th a turn or until it becomes clear again. Remember to mark the gain level and the volume level should you need to reset them at a later date. This is the maximum volume your system will play before it might start clipping the signal. If you have multiple amplifiers, use this method for each amplifier separately. So, hook up only one amplifier at a time, unhook it and move on to the next one.
Step 2: Tuning Frequencies
Time to adjust the built-in crossovers on the amplifiers in your system. Most subwoofer amplifiers have a Low-Pass Filter which prevents higher frequencies from reaching your subs. Subwoofers are designed to reproduce low frequency bass tones, so a low-pass filter is very important. A great starting point is around 80 to 100Hz on the low-pass crossover. Disconnect all other amplifiers and play your favorite music type from a CD at 75% volume. While listening to what the subwoofer is playing, slowly adjust the low pass filter from high to low until the mid-frequencies and high-frequencies disappear. You need to filter out cymbals, vocals, guitars, strings, and any other instruments that are not bass or low drum type. If you experience any popping or muddy sounding music from the subwoofer, turn the filter down lower.
For your speaker amplifier, you will have a Low-Pass and a High-Pass filter set on a switch so you can choose which to use. The High-Pass filter lets all frequencies above the setting to go through to your speakers while preventing the lower bass notes from getting through. Disconnect all other amplifiers and start playing your favorite music from a store bought CD. Your subwoofer will handle the lower notes, so a great place to start on the high-pass filter is where you set your low-pass filter on your subwoofer amplifier if you are using one. If not, a good starting place is between 60 and 80Hz. Listen to your speakers as you adjust the high-pass filter slowly. Get rid of any bass or low drum kicks that might cause distortion in your speakers.
[B]Step 3: Mix it All Together
Let’s connect all amplifiers in the system, turn the radio down to zero and start playing that CD. Slowly turn the radio up until you hear distortion or you reach that 75% limit, do not ever go past that limit. If everything was done correctly, all speakers and subwoofers should be distortion free until that point. If the bass is overpowering the speakers at the 75% volume point, lower the gain on your subwoofer amplifier until it blends well with your speakers. Do not adjust the full-range speaker amplifier to match the subwoofer(s). If your bass is not sufficient enough for your needs, you will need to upgrade to a bigger subwoofer and a more powerful amplifier.[/B]