Quote:
Originally Posted by labskaus
Too much bullshit in One post. The Problem is A total different One.
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I'm an electrical engineer with over 15 years experience. Please elaborate on what is "bullshit". I've heard the Polk MM6501 set in person and would describe the set as warm and inviting, not shrill and lacking punch.
Quote:
Originally Posted by labskaus
Lack of Power...
The Problem is the damping Faktor. Too less Power will Not automaticly end in shrill tweeter and no Punch.
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Damping Factor is a measure of an amplifiers control over a mechanical motion of the speaker attached. A rating of 50 is sufficient to control a subwoofer with a 3" voice coil. The Audison SRX4 has a damping factor of 140. Please explain why you think this is an issue.
Lack of power will cause both shrill highs and lack of punch from midrange/midbass. The higher frequencies require short movements in the voice coil to reproduce sound. As a result, they require less power to be reproduced by speakers. This will cause what some describe as a bias towards the high end or a shrill sound. With midrange/midbass you are requiring the speaker to move a greater distance to produce the lower frequency waves. Too little power will cause those frequencies to not be produced. Since the lower frequencies require more power to be produced a lack of power will also drown them out. IE no punch to them.
Quote:
Originally Posted by labskaus
Shrill tweeter...
Problem with can be solved by eq
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Agreed, but this does not address the lack of midbass. It can also be solved by flipping the switch on the passive crossover to -3db if it is used.
Quote:
Originally Posted by labskaus
No punch
Wrong volume, too weak mounting, wrong Filter settings so Many possible reasons.
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I'm fairly certain that the OP has cranked the volume all the way up and is still complaining about a lack of midbass. Not a volume issue.
Too weak mounting...Car audio component speakers are designed to be mounted free air. Yes, sealing the doors and sound deadening them will produce more midbass; however they should be able to produce midbass without it. The fact they are not tells me that they may not be getting enough power.
Wrong filter setting...This may be an issue for the midbass if he has the headunit crossed over too high or the amp crossed over to high. The Polk set will produce 40-20K according to the manufacture site. I doubt that 40 hertz will be a realistic expectation, but they should be able to get to 60-80 hertz easy. Also this will not cause the shrill sound of the tweeters the OP mentioned.
Quote:
Originally Posted by labskaus
Adjusting the gains
There are several guides in the Internet and on Youtube how to do it right. If in doubt, let it be done by someone experienced.
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Agreed.
Quote:
Originally Posted by labskaus
In sum, i think your installer did No good Job and has to improve the Installation or his skills.
Of Course You can Upgrade your stuff or invest some knowhow to get the best out of your stuff.
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I agree that the installer is the issue here. Without being able to see how everything is wired and set, I'm stabbing in the dark. The installer could have not bridged the amp with the passive crossovers causing 65 watts to each component set just as easily or it could be that the installer crossed over at the amp at the low end too high and has the gains up too high causing the highs to be shrill. More information is needed to get to the true cause of the issue, but from what I've heard so far I'm leaning toward it being related to a lack of power.
Ideally powering a speaker with more power than it is rated for will get you better sound quality by reducing distortion introduced by increasing gains and giving the speakers a better dynamic headroom. Any quality installer will tell you that they will gladly run a 1000 watt amp to your tweeters as long as they have the ability to reduce the input levels through a DSP or EQ.