What is hz?

[NOSFIRE 10+ year member]

Ok I have the Apline CDA 7984..I read through the manual, and was toying with the time correction and the HPF LPF stuff..now regarding hz..how do I read it? The higher the number the lower the bass or the other way around..I am a bit confused with that...thanks

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[evo2k3 10+ year member]

Originally posted by NOSFIRE Ok I have the Apline CDA 7984..I read through the manual, and was toying with the time correction and the HPF LPF stuff..now regarding hz..how do I read it? The higher the number the lower the bass or the other way around..I am a bit confused with that...thanks

hertz (abriveated as hz) is a messure of frequency. Frequency messures low with low, bassy tones and high with high screachy tones.

 

[fantomas 10+ year member]

essentially HZ is "cycles per second". usually (HOPEFULLY) with a sine wave... for example: 20 hz (which would be bass...the lowest frequency heard by humans) is repeated only 20 times a second. 20,000 hz (the highest frequency heard by humans) repeats itself 20,000 times a second.

the time correction i think sounds like a phase. i havent dealt with phasing much so i realing can't help you there.

 

[d audio 450 10+ year member]

Hz= (cycles) / (second)

in other words, the number of air compressions in one second made by a speaker.

the human hearing spectrum is from about 20Hz to 20,000Hz

20hz is the lowest bass we can hear about, and 20000 is the highest pitch sound we can hear apporximatley

-pat

edit: ****, you beat me to it, i took too long to type //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[more_spl 10+ year member]

the time correction is to make up for the time it takes sound to travel from the anywhere in car to match up w/ every other speaker.. EX: Your fronts will reach your ears faster than your rears.. But ehhh, many people dont use rears anyways

 

[NOSFIRE 10+ year member]

thanks for the help..let me get this straight though...

I want to set my front speakers so they dont get too much bass and blow the speaker which they are starting too...so the higher number is what I want to set this to...so like 120hz would be good to eliminate lower bass sounds, and then set my subs to produce lower sounds so I set it low like 60hz..correct?

 

[d audio 450 10+ year member]

yea- u could so that - but if your cutting of your speakers at 120Hz, you want to make sure that your sub setup is taking care of the freq below 120, otherwise you'll have a gap in your cars frequency response

-pat

 

[NOSFIRE 10+ year member]

cool thanks for the help everyone..

I will set my sub for below 120..I think around 60 is the lowest for my settings, so I might get it there..thanks again

 

[more_spl 10+ year member]

dont sewt it at 60 man.. do like audio450 said.. make sure you have no "freqency gaps" in your X-overs.. make sure where one component ends, another one starts..

ex:

Lows = Up to 100

Mids = From 100 to ABC

Highs= ABC to End of spectrum..

 

[n2audio 5,000+ posts]

The slope of your crossover should also be taken into consideration. You never really have to set your x/o's to the exact same points because crossovers don't just cut out everything below 120hz. They gradually reduce everything below 120. With a 12db/octave crossover the spl will be reduced by 12 db every octave, so a 60hz tone would be 12db quieter than a 120hz tone.

Basically, just start with a base setting - say 120 hi pass and 120 low pass, and adjust from there to get the sound you like. Mine is set up at about 70 hz hi pass and 50 hz low pass with a 24db/octave crossover.