[jbwitt]

I posted this inside the official 3808 thread but haven't gotten any responses so I'll start a new thread.


I've had my Denon 3808 for a month or so. The first day I got it, I ran Audyssey and everything went fine. Today, I reran it and the test tone made 2 of my speakers crackle. They are 5 yr old bookshelf Aperions and they didn't do that a month ago during the first Audyssey setup. Did I damage my speakers somehow with the Denon? I verified it's not a wiring problem and I never turn the volume up very loud so I'm not sure what could have happened. Also the speakers have been set to small in the 3808 since day one.

 

[MichaelJHuman]

It does sound like your speakers could be damaged.


As a double check, you could playing a series of single frequency test tones through them. You can download files for this online in a few places.

 

[lexicon1]

There are a couple of reasons you can blow a speaker.

a) Distortion from over driving your AMP because it is clipping. Your Denon I am sure ,is quite capable. so this is not likely the issue

b) sending lower tones such as bass tones to the tweeter or midrange that dont belong there.

C) accidentally over driving your speakers at too high a volume , even for an instant can do this.

Is the issue you are encountering ONLY on test tones , or are you also noticing it on any music and movies information ?

Suggest you also swap out or move your test to a "good" speaker to insure that it is the speaker and not the receiver .

Contact aperion, and , you may also be able to order a replacement speaker component and replace it.

But, finding out what caused it is important.


Do you have kids ? Something may have happened that you are not aware of...at the hands of another user.....anything is possible.

 

[jbwitt]

Thanks for the replies. I've already confirmed it's not the receiver or wiring by swapping speakers around. There's no question it's the speaker that's the problem. I don't notice the crackle as much with regular content, but it is there. The test tone makes it easy to hear because it sweeps through the frequencies. I'm guessing the only way this could have happened is somebody turned the volume up without me knowing about it. I do have 2 little kids so maybe they are the culprits. I went into the Denon settings and set a volume limit. If only I'd done that in the first place maybe this wouldn't have happened. I guess I'll be calling Aperion tomorrow.

 

[lexicon1]

Would you mind letting us know what it costs to replace the damaged component in the speaker. Hopefully, you wont have to tear apart the speaker to enter the box.


Ive got a cat that I know has attacked some of my speakers(without my seeing him do it), so, I sorta know the feeling.

 

[arnyk]



Quote:
Originally Posted by jbwitt /forum/post/15523101


I've had my Denon 3808 for a month or so. The first day I got it, I ran Audyssey and everything went fine. Today, I reran it and the test tone made 2 of my speakers crackle. They are 5 yr old bookshelf Aperions and they didn't do that a month ago during the first Audyssey setup.

Speakers often crackle if they have been subjected to too much power over too long of a period of time.


The voice coils on speakers will deform if subjected to too much power. Eventually, they start rubbing on metal parts around them, and make crackling sound.


The abuse might have been marginal over a long period of time, or more pronounced over a shorter period of time.


It is quite possible that the first time you hear crackling is not when you damaged them, but is the first time you damaged them to this extent, or the first time you stressed them in such a way that the damage became obvious.

 

[jbwitt]

Problem solved. I called Aperion yesterday. They looked up my order from 7 years ago and told me they had a batch of speakers that year that had some bad epoxy on the back side of the posts. When it gets hot it melts and runs down the wire causing my problem. So, they gave me the option to send them back to be repaired free under warranty or try to get the epoxy off myself. I opted to try it myself first. So I took apart the speakers and sure enough, there were red epoxy stains all down the wires. I got some acetone, cleaned the epoxy off, put them back together and viola. They sounded as good as new. Aperion's customer service is great.

 

[BrownRB]

What a story! Glad you were able to fix it.

 

[lexicon1]

Glad you fixed it, but....

Why not ask your speaker company if they have an alternate epoxy that you can substitute or cover or replace .

If the epoxy is melting, its because of the heat as you mentioned , you are driving the speakers somewhat hard enough to melt the stuff.

Go for a long term fix. See if they have other ideas in addition to just scraping off what has melted.

Congrats on the fix though.

 

[MichaelJHuman]

A great outcome!

 

[jbwitt]



Quote:
Originally Posted by lexicon1 /forum/post/15577265


Glad you fixed it, but....

Why not ask your speaker company if they have an alternate epoxy that you can substitute or cover or replace .

If the epoxy is melting, its because of the heat as you mentioned , you are driving the speakers somewhat hard enough to melt the stuff.

Go for a long term fix. See if they have other ideas in addition to just scraping off what has melted.

Congrats on the fix though.

I don't drive the speakers hard at all. They had a run of speakers in 2003 in which the epoxy was defective and not heat resistant according to the rep. They no longer even use the epoxy. The rep said it was overkill and if I had them repaired under warranty they wouldn't even put any epoxy back on them.