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Need help with alpine-9857 unit

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Old May 2, 2007 | 12:12 PM
  #1  
johnqt3's Avatar
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Default Need help with alpine-9857 unit

I got the headunit installed last week and just recently started looking at the manual finding out what this unit is capable of doing. Right now I'm running the headunit with stock speakers on a MY06. I listen mostly to Hip Hop, Trance, Rap so bass is nice to have.

I'd like some info on the Bass Center Frequency. whats the diff between 80Hz, 100Hz, 120Hz, 60Hz.

What is Bass Bandwidth and the settings allowable on the unit. 1.25, 1.00, .75, .5?

Same goes for Treble - 10.0kHz, 12.5kHz...etc

What is BBE and the modes allowable on the unit.

How should i set bass and treble.

At times the bass and sound is real good, but then when it changes to other songs the bass or sound seems distorted or like theres too much power going to the speakers.

Any advice on tweaking to the types of music i listen to would be great.

If there are any other settings i havent talked about that can greatly affect the sound or what not please do let me know.

Thanks

John
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Old May 3, 2007 | 10:38 PM
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From: IN THE HOOD
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most humans can hear sounds in the frequency range of 20hertz to 20,000hertz. the lower the frequency, the "deeper" the perceived sound is.
so 20hz - 200hz are the bassy, boomy sounds, and 8000 and up are the tinnier, shrilly, high-pitched sounds

when you turn the bass to +3, for example, what frequencies should be boosted? if a small RANGE, it sounds unnatural , right? so if you decide to increase the bass, you want to increase a spectrum. setting the center frequency is telling the HU where most to emphasis the increase... so 60hz means increase the deeper notes, and 120hz means increase the lighter bass notes

same for treble

the bandwidth is how narrow or wide this range of adjustment will be. higher he number the wider. so 1.25 means your settings will affect a larger "portion" of the bass range... .5 means you want your +/- bass/treble settings to affect only a small portion on the sound spectrum

BBE is just their own name for their sound processing scheme. every company will have their own term for it. most of the time, it artificially boosts up the low end frequencies and high end frequencies... which many people are conditioned to think is better (when its really less accurate/natural). 1.2.3... the higher the number the more effect

what should you set it to? the purist answer is to set adjustments so that the resulting sound is most accurate -- what it would sound live. but really... its a matter of perception... so set it to whatever sounds best to you

the only real thing to note is that the stock speakers are low quality, and are not good at playing low notes (60hz range)... so setting the center frequency on it will make your bass level adjustments ineffective
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Old May 3, 2007 | 11:30 PM
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Finally some answers... thank you very much as I see it probably took some time to explain everything, very helpful information.

Thank you
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