Babak

Hi guys,
my Lexus IS250 2007 audio system has a problem. when i turn my audio system on, sub woofer make a sound like knocking and after that no sound.
I tried radio and aux and they are the same, no sound.
what do you think the problem is?
I tried to unplug the woofer and it didn't work again.

Bichon

Do you have the Mark Levinson system? I'm thinking it might be a bad amp.

Tro209

Yeah sounds like a bad amp like Bichon mentioned however I'm not very experienced in this area.

Hmmm.. Maybe it's just your cars way of saying that it's time to upgrade the factory stereo system ?

Wait you mean all your speakers don't work or just the subwoofer?? Because mine blew out about a year ago and haven't bothered replacing it yet . It's a common problem on Mark Levinson equipped models.

Babak

How can i realize what is my audio system? I kust bought the car and it doesn't have owners manual.
And the problem is when i turn on my audio system,my sub woofer just make a sound like doooop. And after that nothing. I tried radio and aux input. Non of them works.
You think i should replace my amp? Do you have any idea how much is need to pay to replace that?

Tro209

What I meant to say is, does your car stereo play any music at all? Or is it just the subwoofer not working?

Babak

No it does not play anything.
I mean Audio system shows it is playing in audio system display, but there is no sound.

Tro209

In that case that is not a common problem. Maybe you should have a Lexus tech take a look at it. It could be the amp but then again it could be anything really. Sorry if I'm not of much help. Good luck

Babak

Do you have any idea that how much amp can cost?

Tro209

I can't say honestly since it hasn't happened to me nor have I heard of this issue personally. Maybe some one else can chime in on this with more experience than myself. This is why I said you should probably call up Lexus, set up an appointment and have someone knowledgeable look at it. That way you'll know exactly what you need and they can give you a price quote for parts and labor. If it's too much, I'm sure you can alternatively take it to a reputable stereo shop and they can replace what needs to be replace with something of higher quality .

Icy350

iTrader: (18)

If you just bought the car, most dealerships even 3rd party have a 30day warranty incase anything goes wrong.

Check with them and see if they will remedy your issue.

Babak

I bought the car as is. It doesn't have any warranty

Icy350

iTrader: (18)

Like auction or Private seller?
oh man that blows

Sorry I cant really offer any more help, Audio is not my field.

Gville350

iTrader: (10)

I'd visit a local stereo shop and have them test the factory amp. To me, it sounds like its in permanent "protection mode." But before you do this, check that the amp is actually in trunk...passenger's side. Remove the black plastic piece and you should see it right there. Then check that it has all of the connections tightly connected to the amp.

Good luck!

Babak

thanks Gville, Can you explain a little more about where i should check for amp. in the passenger door you mean?

Gville350

iTrader: (10)

^No. It's in the trunk. Open trunk, remove the black plastic piece on the passenger side of the trunk floor, and the amp is below it.