Subwoofer sounds muffled or no sound just started a few days ago put head phones in receiver the bass sounded fine subwoofer has been popping as of late every once and awhile

if you have your front and centers set to 'small' you want your Bass out to be subwoofer only, and the rca jack labeled 'sub out' is the only place to connect your sub to if you want to control the frequencies with your reciever. I dont know the brand of your sub, or the inputs on the back of it to advise you where to connect, but it sounds like it worked for you at one time, but suddenly it does not

Maybe start with speaker test tones to verify the hardware instead of messing with live audio modes.

http://www.retrevo.com/support/Denon-AVR-2801-Receivers-manual/id/363bh831/t/2/

BTW: the powered subwoofer is supposed to be driven by the 'Subwoofer' Pre-Out.

What input are you using that allows audio when you select EXT IN AND the other modes? That is a specialized analog input for 5.1 analog equipment ONLY. (Page 32)

Hey. I have two PS210's One popped and stopped working 9 months in to it. Under warranty the technician said that Infinity produced these speakers wit ha known heat related problem. Some part burns up. He replaces them all the time. You can expect about a year's service as my seconf one just popped and died. It costs about $153 to fix it here in phoenix. Will never buy Infinity again from what I know

You don't say if you've configured the Receiver to know you have a subwoofer (under Multicontrol - SUBW YES). Unless it knows about the Sub it won't send anything out that single "preout". You can get an RCA splitter to run that single output to both inputs in the Sub.

Just as an experiment, temporarily run one a pair of cables from the REC OUT to the Sub's inputs and tune an FM station to prove the Sub amplifier is alive. If it's still silent, it's dead. If there is sound (muffled) you need to go back to the Receiver to figure out why the Sub Preout is signal-starved.

sound like the center channel is out
either bad connection at speaker or receiver is not putting out sound on center. A quick swap of speakers at receiver end will tell you if it is the latter

uhhh....try you change your wire setup

Hi airnurse

If you are using a cassette deck for a source of music, then it will have dirty heads. This can be cured by using a head cleaner cassette. Muffled sound from the loudspeakers usually points to a faulty high frequency driver(tweeter). Is the sound muffled on radio or other sources as well. If so, then you have faulty tweeter(s) to any speakers that are muffled.

Of course in saying that, you should check that someone has not just turned the treble control all the way down, or the bass control alll the way up :) Pays to check.

I am more than happy to answer any other questions you may have about it, just give me a hoy :) If you are still unsure, or have problems, then before you give a rating for this advice, please get back to me and we can try some more things.
Thanks for using FixYa, If you consider the advice I have given you as sound, a FixYa rating is a great reward for my efforts to help you. Cheers.

regards

If you have a Ohm Meter, check the resistance to the speakers. If it is very high, the speakers are burned, (or the crossover is (just capacitors, and resisters...cheap)). If it is close to 4 ohms check the wiring and connectors..to and at the speakers, most likly the receiver/amp is not blown.

Yea, now its time to replace it! the magnetic effect is weaken which makes the very bass low frequency sound to be distorted! You should re engergise the magnet of the subwoofer or should buy the new!

I bought my VE-28s and it did exactly that crackled, cerwin replaced part in amp but few months later problem persisted. they then replaced entire amp assembly and its been fine. i really push it to and its been fine. to test it, unplug the connection from amp/ reciever and see if it persists. if so its the sub, if not its the amp/ reciever. dont dump it, these subs really crank and can put out some deep loud bass.