الموضوع: how to choose mp3

thx very much....(known first.. some words need 2 b modified)

let is continue the thread i hope there is a lot of readers
snr is common in mp3 mp4 and cd player and hi fi car cassete
home theatre and computer supwoofers
by the way do not buy products which did not tell you the snr of it becuase the snr will be very low and the company did not want to say this so take care ,in mp3 and mp4, cd player and mobilephone the snr is very important because the distance between the headphone and your ears is too small so you can hear noise easily but in case of hi fi home theatre and supwoofers of pc the snr is not too much important if your ear is far about 1 or 2 meter away of the speakers but as the volume is get higher and higher your ear will begin to feel the noise so snr in hi fi and home theatre and pc supwoofer is importnat at high volumes and also with hi fhi and supwwofers with high powers output which is put in small rooms
but in case of car cassette the snr still important becuase your ear is very close to the speakers so snr is important

let is get to onother point which is
what are the factores effecting quality of the sound
50% is on the sound system 50%on the speakers or headphones
see how important is the quality of speakers and hedphones is
vip
i talk about snr which is a measure of the quality of sound system as mp3 andmp4 and car casstete
but in headphones or the speakers what is the measure of the quality in it
here it is
i will talk about headphones firist
sensivity
in brief
sensivity
is the measure of the volume of the headphones
as the sensivity is higher means the the volume it will produce is higher sensivity have a relation with power
here it is the volume of any sound output like car casstet or mp3 or mp4 etc is measured by its power output let is say that my mp3 produces 30 mw power
15mw per channel ie per each pair of the headphones
and i will use a headphone with sensivity 112db
what i will hear is thatwhen i were at volume 3 the sound is too high
let is test another headphone with 100db
what i will hear is that i get the same high of sound but at volume 8
see the difference
the power here of mp3 do nothing
but the sensivity of headphones here make the difference
take care
as the quality of the headphone increase the sensivty decrease
becuase the matarial which produce high quality of sound
eats more power so it is immposibal to have high sensivity
and here is the war between headphone manafactoring
they need to make matarial with high quality sound and high sensvity
so now we want toknow how to know thw quality of headphone
i just talked about volume
not quality
soon i will continueeeeeeeeeee becasue ia m tired
and i need to give you all my experiance and technology as i told you
please i need some encourgement
hey readerssssssssssssssssssssss
do somthing
byyyyyyyyyyyyyyyyyyyyyyyyyyy

original headphones
in egyptian stores
koss
sony
philips
samsung
panasonic
creative
jvc


fakes haedphones
of course 100%
have a high volume becasue the cheap,matarials
so have high sensivity
and of course becasue thier fake mp3 have a low power ouput
so they need a fake headphone with high sensivity with cheap matairalses so as you can hear the sound higher
shkl nsaben chinaaaaaaaaaaaaa.


factores that i will talk on it later on headphones and also speakers as car speakers is
frequency
type of wire
type of jack
thd
power outout
impedeance(resisteance)










take care from fakees which take the brandnamed
there is no original headphones which is less than 60le
which is the lower on in quality and performance
the average quality headphones which have a good quality will not be less than 200le
and there is much higher up to 1000le
but my goal is that to pick up the best with the best price
and this is my goal but there is a limit do not think that with 60 le you will pick a good one
but think that you can with 200le pick one equivelent to 400le of onother compny and enetr the war and pick the winner
70% of egyptian use fakes
25% use the headphones cames with thier mp3 or cd player or mobile
which is equivelent to 60 le headphone quality
becuase no comapny will put with thier mp3 or mobile headphone with 200le
so put this in mind


f)

طب ممكن موضوع زي ده بالعربي عشان انا نفسيتي تعبت جدا و مش فاهم حاجه

why you did not understand i thought i write it very simple
and becuase my laptob have no arabic on it so this makes writing in arabic is diffecult

can any one translate this article to arabic becuase my laptob keyboard have NO ARABIC pleaseeeeeeeee
so as every one can benifit from it

first of all i am a man my name is mohamed gamal
ok and thanks for your advice
iwill buy it soon