Ok and when did I say that this was proven FACT! I did say that I heard from multiple reliable sources. Guess they may not be so reliable.

I have how ever written into Pioneer to find out from a tech the reason for certain players being NON-CD-R/RW compatable. I egarly await their reply.

I can tell you for a fact! That in my experience I have seen a huge rise in break downs of factory head units and aftermarket head units and changers. Each one when they crashed HAD A CD-R in the unit. With this data I can only assume that they are causing the units to break.

I have hear you say a lot but you still have not answered a question. Why are some radio's CD-R some CD-R/RW and some not rated to be CD-R compatable all within the same production line!!!

You profess that there is little to no difference then why are they not all CD-R compatable.......yes RW's are harder to read so a better lazer pickup is needed I assume.

 

oh geez, deja vu....

David

 

ditto man

[QUOTE]Originally posted by almilli
[B]oh geez, deja vu....

 

Yeah, but I'm staying out of it this time Oh, BTW, I think I'm gonna be ordering some of your rear speaker panels in a couple weeks when I get back home.

 

Hi,

I'll try to answer Pinkys points first......


"I have hear you say a lot but you still have not answered a question. Why are some radio's CD-R some CD-R/RW and some not rated to be CD-R compatable all within the same production line!!! "

ok, this all comes down to the Laser that is used in the cd transport. The lowest common denominator is a laser that will read normal cd (red book) cd's. In order to read cd-r's you need a laser that is more powerfull as the relfective index of the disc is lower. In order to read cd-rw's you need a higher power laser AND a form of electronic gain control as the reflective index is lower still.


"CD-RW drives use phase-change technology. Instead of creating "bubbles" and deformations in the recording dye layer, the state of material in the recording layer changes from crystalline to amorphous form. The different states have different refractive indicies, and so can be optically distinguished.

These discs are not writable by standard CD-R drives, nor readable by most older CD readers (the reflectivity of CD-RW is far below CD and CD-R, so an Automatic Gain Control circuit is needed to compensate). Most new CD-ROM drives do support CD-RW media, but not all them will read CD-RW discs at full speed"

quote from :- http://www.cdrfaq.org/faq02.html#S2-12

Now the reason that different units may or may not be cd-r/cd-rw compatible comes down to the transport that is used in the unit. Its as simple as that. Different models of unit from a single brand use different transports.



"I can tell you for a fact! That in my experience I have seen a huge rise in break downs of factory head units and aftermarket head units and changers. Each one when they crashed HAD A CD-R in the unit. With this data I can only assume that they are causing the units to break. "


While not wanting to doubt your experience I dont belive this is a valid statement, for example.....everytime my car has ever broken down it has had petrol in the tank, but it's not reasonable to suggest that the petrol is always the cause. As with anything mechanical you always get failures....some times you get 1 in a day, sometimes you get 100, and sometimes it is just down to fate. My job brings me in to contact with these type of failures every day. some days I'll see the same fault 50 times, then never see it again for months.....


And Magyvers questions......


I'm not sure, I'll have to go off and do a bit more reading to try to find out. I'll let you know when I have more data on the PCA on Cd-r's

Hope all of this helps, any other questions then just let me know.

Cheers

Mark.

 

[QUOTE]Originally posted by markcu
[B]Hi,

I'll try to answer Pinkys points first......


"I have hear you say a lot but you still have not answered a question. Why are some radio's CD-R some CD-R/RW and some not rated to be CD-R compatable all within the same production line!!! "

ok, this all comes down to the Laser that is used in the cd transport.

 

Maybe the next ten that come in blown up with CD-Rs still in them, ask the customer if they generally play CD-Rs. If they say "yes", then there's a good chance there will be a CD-R in the player when it goes kaput. Mark's analogy was right on the money...just because the dead player's have a CD-R in them doesn't mean it's the CD-R that's killing it...it probably means these customers are listening to CD-Rs (cut from MP3s from the net) more often than normal CDs, therefore, there's a much higher probability that when the player DOES die, it has a CD-R in it.

9 out of 10 lab rats die of cancer....labs must cause cancer

 

[QUOTE]Originally posted by MacGyver
[B]Maybe the next ten that come in blown up with CD-Rs still in them, ask the customer if they generally play CD-Rs.

 

Pinky,

As far as I'm aware no one has mentioned sony head units in this thread, so I'm unsure where your referance to "you think Sony is great" has come from, or where your personal attack on Macgyver has some from. As far as I can see from this thread he has only tried to tell you the truth based on hard facts as I have. None of our points are from "multiple sources and very very reliable ones for that matter" They are based on documented facts.

As for things being unfortunate.....It's unfortunate you are not willing to concede the point and say "I guess my sources were wrong, thanks for the info guys I can start to look for other causes"

If you are seeing an increase of broken head units from a single manufactuer then this would point more to a quality issue with that manufacturer.

I am now going to bow out of this thread. I believe I have made my point sufficiently well to assure people reading it that using cd-r's WILL HAVE NO ADVERSE AFFECTS ON YOUR HEAD UNIT. If anyone would like to mail me with any other questions or concerns they have, then I will do everything I can to provide you with answers based on solid facts like the ones I have already made in the thread.

I hope you do find out what is causing these failures Pinky, but I would suggest your time is spent persuing other avenues, but at the end of the day it's your choice.

Take care and drive safe everyone

Mark.

 

[QUOTE]Originally posted by markcu
[B]Pinky,

As far as I'm aware no one has mentioned sony head units in this thread, so I'm unsure where your referance to "you think Sony is great" has come from,