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My pornstar name came up "Jay the Snork."
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i did a search on this and got a partial answer to my question from a previous thread. qualitysound wrote that the snr did not matter that much in a car because the number e.g. 85 dB, represented the difference between the signal floor and the background noise, and the road noise would be around 70 dB anyway, i guess masking any noise that might come through the speakers. right so far? what about listening when the car is off? would a non-audiophile really notice much of a difference between the 85 dB snr of one unit vs. the 100 dB of another. does this depend on the volume? for example, if you play music at 95 dB you would hear 5 dB of noise on a unit w/ snr of 90 dB, none on a unit with a snr of 103?if so, how many dB does a typical 25 watt rms aftermarket head put out over typical low to middle priced set of after market speakers(say 50-100 bucks per pair?) when the volume is set at about 75 % ? i know this would depend on speaker sensitivity so any rough estimate might (or might not ) be helpful. thanks in advance for answering a probably idiotic convoluted question. :???:
 

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i think its a good question, and if you have sesitive ears, and enjoy a clean accurate sound, I would think you would tell the difference when the car is off...but I am not sure how the SNR plays a roll and what it actually is. I was under the impression that its the accuracy of how the HU picks up sound from the source (cd, or tape), but I dont know about it. Im better at listening to a pair of speakers and telling the differences.
 

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I've been an audiophile for several years and have always contended that critical listening has no place in a car.
In the living room, speaker position is an on-going tweaking process to widen the soundstage, balance that sweet spot, etc. This cannot be done in a car.
The acoustic properties of the interior of a car is also detrimental to quality of the music being played. The hard, reflective surfaces of the windows and the soft, absorbing surfaces of the upholstery can drive a person nuts trying to get it to sound just right.
A non-audiophile would certainly not notice the difference between different units or maybe even speakers, much less different SNR units. An audiophile would not consider your car to be the location of ultimate sound reproduction and therefore wouldn't expect it.
JMHO
cheers :beer:
 

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True that the car is not the optimal ideal place to do critical listening,
but why not work towards the best possible at reasonable expectations.
If some one can tell the difference from a deck, and a speaker...would SNR then be a concern?

a listening room with a glass of your favorite drink or perhaps a cigar would be great, but the car has its own qualities. And since the attention is mainly on the road and driving, the ears that are used to listening to quality sound would like to hear that as much as possible in the car.

Also the car is not as much a durable good, since many change cars after a 2 year lease or 3-4 years owning one, perhaps the investment into a sound system is relevant to the pocket book and the importance of entertainment.

I refrain from spending a great deal of money into the cars audio system, even though thats the second place on my list of wear I listen to audio, the 3rd would be at home. :thumbup:
 

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mfitz: There are technically two answers to your question (as I see it) First off, we'll assume you are listening with the car off b/c road noise varies too much to throw into the equation. But anyway, yes SNR is absolutely something to look at when choosing a cd player or amps or eq's or anything in your signal chain. Generally speaking the higher the better. And I would imagine that you could absolutely hear the difference between a 85 and 100db snr, even if you're not an audiophile. The big difference would be the lack or NOISE. That's exactly what it is, its more music or signal, that is coming down the line compared to the noise, like hiss. Not to say that a bad recording with hiss will suddenly not have hiss, just that hiss induced by op amps, etc will be drastically reduced when it hits the amplifier........which is why there are two answers.

You didnt mention using an aftermarket amplifier, so if you use the factory one then I say you probably wont notice much of a difference at all, though it will still be a small difference. The amplifier that is built into your cd player is not exactly a fine piece of audio equipment, and even though the SNR of the cd player (and it's RCA outputs) is 100DB, the SNR of that amp is probably about 65DB and the total harmonic distortion (THD) is probably about 10%. Even still though, it is safe to say that a cd player wich advertises it has a 100DB SNR is probably of substantially higher quality than one with a 85DB SNR, and the amplifier built into it is probably better also. So even if the SNR is not what you're actually hearing, it is just one more spec you can look at to judge the overall quality of the cd player.

However, if you use an extermal amplifier (with a decent SNR) then you will most certainly hear the difference in the SNR's. The RCA output is where the SNR is measured on the cd player, and using an external amp will allow you to pass this on to the amplifier. Also, a higher voltage RCA output is nice for reducing noise in a stereo because not only does it reject alternator whine that could be induced through your wires, but it also allows you to turn the gain down on the amplifier while still achieving the same output level at your speakers (compared to a lower voltage output cd player) And this will in turn reduce the noise/hiss that comes through your stereo.

All of these things are factors to look at when choosing a cd player, but just remember that the specs arent everything, and all of this also depends on whether or not you use an external amp....

Good luck choosing your cd player,
Morgan
 
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