millo777
MB Enthusiast
- Joined
- Mar 9, 2011
- Messages
- 1,250
- Location
- Swansea, Dubai, Riyadh
- Car
- 1997 W140 S600L/2003 S211 320cdi
I've been trying to cure a problem my W124 has with annoyingly noisy tweeters.
It's a kind of hissing/crackling sound that is constantly there. Imagine listening to a badly tuned radio and thats the noise I get, but only from the tweeters. Not a sibilance issue, as it's present at all times.
The system in the car consists of a Blaupunkt Travel Pilot E2 head unit connected to 2 blaupunkt amps in the cargo area. One amp drives the speakers int he rear doors and a sub mounted in the spare wheel.
The second amp has two outputs, each connected to a 3 way crossover which are then connected to a sub in the front door, a co-ax speaker in the dash and a tweeter on the mirror trim panel.
There are no problems with the co-ax speakers and subs powered from the same amp.
I ordered a new set of Clarion SRE211H tweeters as I assumed the existing ones had blown. This didn't make any difference at all, even using the supplied clarion crossover in-line.
I then connected one of the new tweeters, using the supplied crossovers directly to the amp, same result....hissing and crackle.
Connected the tweeter directly to the other amp, with exactly the same results.
Now I'm confused. The amps drive other speakers with no issues, so doesn't appear to be problem, and the tweeters are brand new.
In case it makes any difference, there is very faint alternator noise picked up by the system but only noticeable when the system is muted. all the earths check out o.k.
What could the problem be?
It's a kind of hissing/crackling sound that is constantly there. Imagine listening to a badly tuned radio and thats the noise I get, but only from the tweeters. Not a sibilance issue, as it's present at all times.
The system in the car consists of a Blaupunkt Travel Pilot E2 head unit connected to 2 blaupunkt amps in the cargo area. One amp drives the speakers int he rear doors and a sub mounted in the spare wheel.
The second amp has two outputs, each connected to a 3 way crossover which are then connected to a sub in the front door, a co-ax speaker in the dash and a tweeter on the mirror trim panel.
There are no problems with the co-ax speakers and subs powered from the same amp.
I ordered a new set of Clarion SRE211H tweeters as I assumed the existing ones had blown. This didn't make any difference at all, even using the supplied clarion crossover in-line.
I then connected one of the new tweeters, using the supplied crossovers directly to the amp, same result....hissing and crackle.
Connected the tweeter directly to the other amp, with exactly the same results.
Now I'm confused. The amps drive other speakers with no issues, so doesn't appear to be problem, and the tweeters are brand new.
In case it makes any difference, there is very faint alternator noise picked up by the system but only noticeable when the system is muted. all the earths check out o.k.
What could the problem be?