I have a polk subwoofer that will distort if the bass is too bassy. It used to run fine with nice tight bass then after a couple of years started to distort. It still sounds good for soundtracks but when it comes to certain very bassy parts of the soundtrack it will cut ut making crackling noises which irritates me. So what do I do? Can this be fixed ? I paid almost 400 4 years ago. Does this mean it's time for a new one or can this be fixed?
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If it's when the sub isn't being driven, then it could be the amp. (Check for bulging capacitors on the amp board). If it's when you move cables about then it could be a broken lead or a dry solder joint on one of the inputs.
If the crackling is when the sub is running then it might be the voice coil has distorted due to being overdriven with a poor and highly distorted signal.
And if you measure distortion, then what? Do you have a scope and a spectrum analyzer and a calibrated sound source?
The Mk.1 Ear can decide if it likes what it hears. Some people LIKE excess bass, for example.
Determine if it's source-related, cable-related, channel-related, speaker-related by swapping or focusing on one at a time and comparing. Try naming the products and look at the manuals for correct setup.
So you're saying one source makes it crackle and another source doesn't. That suggest the sub is fine and we should examine the source and it's signal path. Please elaborate as much as you can on what it it/they are.
Hello.... sorry to hear about your problem. Bass is the ultimate evil of coaxial speakers. You have a couple of options here, and this is just my professional opinion because I do not know what your lifestyle details, such as truck space needs, type of music you listen to, budget, etc. If you are looking for alot of bass, the best bet would be to use 2 external amplifiers, 1 for the interior speakers, and 1 for a subwoofer. You would then need to purchase an electronic crossover. With this setup, you can remove all of the low frequencies from the coaxial speakers and put them where they belong, with the sub. You will gain EXCEPTIONAL clarity and a very high volume before distortion level. Again it will depend on what your budget is and if you are willing to compromise on some cab space. The only other option you have at this point is if you are wanting to play your music at high volume levels, you will just need to reduce the bass level as you increase volume. I hope this has helped. Good luck with your venture!!
Run 2 RCA cables from the two Purple connections on your Receiver (Labled "PRE OUT SUBWOOFER") to the Red and White connectors on the back of your Sub (it does not matter which Purple connecter you plug into either the Red and White)
Set the volume control on the Sub to about 75%, and keep the power switch in the "ON AUTO" position. To set the Low Pass value, look at the back of one of the front speakers in your setup, and note its frequency range (will look something like 100Hz - 17kHz). Set the Low Pass at a value slightly higher than the low value on the back of your surround speakers.
To set the phase switch, stand in the middle of the room with some music on (something with some bass, but not over the top bass) and have someone switch between 0 Deg and 180 Deg. Listen for which setting sounds "Louder and Fuller". This is the one you want. You will need to do this each time you move the Sub, as its position may change its phase in relation to the rest of your system.
crackle or distortion? either you have a problem in your low level imput wires coming from the head unit or your amp is sending a faulty signal...or if you are running dual subs and you have one wired oposite the other they will cancel eachother out, which is a common mistake.make sure that they are both pos. to pos. and neg. to neg.
or there blown or almost blown