VeeshanVault

I burned a CD full of all my Pearl Jam albums in mp3 format to listen to in my car with a new deck I got, and there's a .. hissing noise in the background. Sounds similar to listening to a recorded tape without Dolby NR (Noise Reduction) turned on.

Anyone know what causes this? It might just be the deck since it was only $200 (Sony MP-40) but I didn't feel like shelling out $500 on a Kenwood or Alpine. >< I can live with it, once the music starts you can't really hear it.. it just bugs me so I thought I'd ask! mp3 files were encoded at 160kbps.

Does the noise happen on other CD's or just this one?

I just checked that, does it on regular CDs too so I musta fucked something up. It shouldn't be that noticeable. >< Argh, hehe.

Well I went out and drove around and I couldn't really hear it so not too big of a deal I guess. =)

Probably a lose wire or something.

Spend the money and take it to a car stereo place and have 'em look at it if its bad.

Clearly, listening to low-quality content has caused nerve damage in your inner ear. Fortunately, all is not lost. You can regain your hiss-free hearing in time if you immediately forswear the PJ.

Well, you can keep side A of Ten, but the rest must go.

mplor, are you perchance smoking heavy amounts of crack daily?

Mplor wrote:Clearly, listening to low-quality content has caused nerve damage in your inner ear. Fortunately, all is not lost. You can regain your hiss-free hearing in time if you immediately forswear the PJ.

Well, you can keep side A of Ten, but the rest must go.

I'd ban you for saying that but then I'd be accused of favoritism towards pearl jam or something.

I wouldn't complain

Its only in your car ?
If it is only your car do you have any amps installed?

Yeah, it's just a car cd deck I installed.

No external amps, but I suspect it has to do with one of two things:

1) grounded incorrectly (don't think it's this really, but might be)
2) internal deck amp and built in speaker amps are causing it to be extra loud (I have a 96 300zx with the Bose System installed, and each speaker has it's own built in amplifier or something strange.)

So, I might try disabling the built in amplifier on the deck and see what happens. Unfortunately that requires me to disassemble the dashboard again so it will probly be a while and I'll have to be super bored to do it. =) Can't hear the noise too bad when I drive, so I don't think it'll be a big deal.

re: the speakers

http://www.fiendation.com/300zx/bose.htm wrote:It's overpriced, overengineered, and gimmicky. The head unit (tape deck/radio) is manufactured by Clarion. Each speaker (one in each door, two in the hatch area) is built into a large injection molded plastic enclosure. Each enclosure not only houses a speaker, but also a seperate amplifier! As far as I know, Bose themselves make the speakers, which I *think* are very similar to those found in the Bose 101s/901s, etc. It doesn't sound bad but it could certainly sound better.

It's not necessarily the signal amplifier in the deck itself. I would venture to guess that the wiring is the issue. Standard stranded wire that most auto manufacturers use is pretty poor quality. The wire itself can pick up static hiss and even act as an antenna and receive small amounts (i mean really small) of interferance. However, that small amount, if amplified could lead to a hissing in the speakers. What we used to do when my friends and I were wiring stereos was replace the wire with monster cable. They've got this braided wire that actually uses the postitve and ground weave as a means of blocking the static magnetically. It's expensive stuff, but it made the difference in competitions.

Yeah but I'm not competing anything, and I don't feel like totally taking apart my car and rewiring it. Thanks for the info though, if I ever do a speaker upgrade, I might consider doing that.

One of my professors gets a headache from listening to CD's for to long, he claims he can hear that noise ALL the time, since he can actually 'show' me the noise I can't deny him his drama.

Sounds like a bad ground. You splice the wires or did you use a kit?

More than likely its a bad ground along the line somewhere, maybe a cut in the sheath or some shit, but hissing can also come from signal and power/ground wiring running to close together. You get the same thing if you have run amplifiers and signal processors with the RCA's and Power Cables running along side each other.

Check your ground, make sure it is clean with no paint or anything on the surface of whatever you may be grounding on if you had to do it that way. After that, I would just make sure that all the power/ground/illumination wiring is seperated from the speaker wiring. You can just use electrical tape and tape them off to keep them apart.

Xouqoa wrote: (I have a 96 300zx with the Bose System installed, and each speaker has it's own built in amplifier or something strange.)

I figured out your problem - BOSE!

So you're running speaker level outs to an amplified speaker? My buddy did this in his old 240SX (well, speaker level out -> amp -> speaker), and that POS caught fire one day at the beach

ya but they're not amped with a normal amp.. it's some built in piece of crap.

They also have kits where you can bypass the built in amp units on some cars "premium" sound package. If anything, just find the amp, disconnect it and use the plugs that came from the amp to hook your shit up.

Or you just wired it up wrong, blew a few things out in your car. That just happens to make your head lights, foglamps, and tail lights not work. Now your car is sitting in a car shop, prolly.


Wait. I hit it dead on!


Hahah

If your gonna install a new deck in your car always spend the extra 20 dollars for the wiring harness. It saves time and keeps it looking clean.

Xouqoa wrote:...but I didn't feel like shelling out $500 on a Kenwood or Alpine

SLACKER!

Raistin wrote:Or you just wired it up wrong, blew a few things out in your car. That just happens to make your head lights, foglamps, and tail lights not work. Now your car is sitting in a car shop, prolly.


Wait. I hit it dead on!


Hahah

rofl

Ya, I used the wire harness. I had no desire to mess with trying to figure out which wires did what.

I spoke to the guy who runs the repair shop where I took the car to fix the headlights and he said it's not anything I did.. so Raistin can fuck off cause he's been giving me shit about it.

LOL! You've let teh gremlins loose, your car is DOOMED!!!