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Car Forum / Driving, Maintenance, Tuning / Car Audio / July 2004Is there really a difference between 94dB and 120dB SNR?
I am currently debating between two MP3 CD receivers: The Pioneer DEH-P4600MP and the Sony CDX-F5500. I can get either for about the same price and both seem to have more or less the same features (I don't need WMA playback capabilities). I have been able to reduce the differences to the following important ones (for me): Sony CDX-F5500 Pioneer DEH-P4600MP -------------- ------------------- FM Sensitivity: 9dBf 8dBf CD Signal-to-Noise: 120dB 94dB According to this, the Pioneer has clearly superior tuner. On the other hand, the Sony has much better CD playback SNR (signal-to-noise-ratio) - 26dB more, to be exact. It seems to me though that 94dB is more than enough (especially with ambient road noise - even when all windows are closed) and that 120dB is simply an overkill. So, I am currently leaning towards purchasing the Pioneer. What do you think? Am I fundamentally wrong here? Thanks, Sam > I am currently debating between two MP3 CD receivers: The Pioneer > DEH-P4600MP and the Sony CDX-F5500. I can get either for about the [quoted text clipped - 20 lines] > > What do you think? Am I fundamentally wrong here? What does this have to do with road noise?? I'd get the Pioneer. Sony fell off the wagon years ago. DJ TecThreat The Real Threat > What does this have to do with road noise?? > > I'd get the Pioneer. Sony fell off the wagon years ago. DJ, thanks for your recommendation. I think I will indeed go with the Pioneer. As for your question, I am sure everybody here will agree that the Signal-to-Noise ratio of a cassette tape player is much worse than this of a CD. Yet, while I couldn't stand listening to a cassette tape in my living room, it didn't bother me that much when I listened to it in the car. The ambient road/car noise made the tape hiss noise "negligible"... Did I explain myself better this time? BTW, what do you mean by "Sony fell off the wagon years ago"? Was there a specific incident that change the landscape of entertainment electronics and made Sony not a quality manufacturer anymore? Can you point me to some links (URLs) for further reading on the subject? Thanks, Sam > BTW, what do you mean by "Sony fell off the wagon years ago"? Was there > a specific incident that change the landscape of entertainment > electronics and made Sony not a quality manufacturer anymore? Can you > point me to some links (URLs) for further reading on the subject? I just think the products they produce arent what they used to be and lack the quality for the price they're asking. The stuff they made 10+ years ago was much better (for that day and age) now its just junk. DJ TecThreat The Real Threat Sony has long been known as the brand salesmen are most likely to convert their customers FROM. In other words, the brand is on consumers lips, but doesn't go out in their hands. . www.MAINSTREET-AUDIO.com ~ ~ ~ Where SERVICE never goes out of style ~ ~ ~ V I S I T O U R F O R U M http://63.74.14.174/forum/phpBB2/index.php it's a salesmen's job to sell.... be it sony or pioneer.... If I had a salesmen convince someone to buy a pioneer over a sony and it cost me money (cause the pioneer was cheaper or something like that) ... his a.s would be looking for a new job. FHLH....... opinions are like a.sholes.... every salesmans got one, but should keep it to themselves... :) > Sony has long been known as the brand salesmen are most likely to convert their > customers FROM. [quoted text clipped - 8 lines] > V I S I T O U R F O R U M > http://63.74.14.174/forum/phpBB2/index.php Why do you have pioneer premier cheaper than the "standard" line? > Sony has long been known as the brand salesmen are most likely to convert their > customers FROM. [quoted text clipped - 8 lines] > V I S I T O U R F O R U M > http://63.74.14.174/forum/phpBB2/index.php >Why do you have pioneer premier cheaper than the "standard" line? cause we're really nice guys. because premier warranties arent valid unless installed by an authorize dealer / shop . -- Mister_ > because premier warranties arent valid unless installed by an authorized > dealer / shop .. > -- > Mister_B What and who are you replying too? You don't quote so anyone accessing the group via a newsserver (as Usenet is designed to be accessed) cannot tell. The warranties on Pioneer products are valid if it is purchased from an authorized dealer/retailer. It does NOT have to be installed by them. Les while driving?.... prolly not. FHLH.... > I am currently debating between two MP3 CD receivers: The Pioneer > DEH-P4600MP and the Sony CDX-F5500. > It seems to me though that 94dB is more than enough (especially with > ambient road noise - even when all windows are closed) and that 120dB [quoted text clipped - 6 lines] > Thanks, > Sam Nope, you've pretty much nailed it. Let's look at what those two signal-to-noise ratios actually mean: 94 dB S/N: The signal is about 2.5 billion times stronger than the noise. 120 dB S/N: The signal is about one trillion times stronger than the noise. In either case, the noise is well below the level of audibility, whether you're listening in a car or in a studio. Stereo manufacturers should probably just quit listing S/N ratio on their spec sheets - it's been a non-issue for quite some time now. Scott Gardner I haven't seen the whole thread, but if nobody's mentioned it, you should make sure that S/N is being measured the same way. As an example, under CEA-2006 amplifier S/N is being measured at 1 watt, which is reasonably close to worst-case as opposed to measuring it at full output which is usually best case. That can give you more than 20dB swing, but the device is no noisier either way. Head unit measurements are probably not as skewable that way, but my point is know what you're comparing and how it was measured. JD > > [quoted text clipped - 24 lines] >Scott Gardner > |
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