Would like to know how to lower the pitch as currently is very sharp.....

Your setup? Anyway high pitch can due to alot of problems :
Tweeter : using cheap ones, HU treble set too high, use wrong rating capacitors(DIY), amp HPF set too high
Speakers : HU treble set too high, use wrong rating capacitors, amp HPF set too high.

what about the 4ohm and 2ohm?

Espionage@ give more info as what system of ICE are you running at...

there is alot of possibilities...

can u tell me urs..i will use ur template.

this 2 will not make ur system produce high pitch.......

Any possibility that would cause this happen?

Maybe I'm wrong, care to enlight us? Anyway I do came across using too high uf value of capacitor where it cut off all the bass and cause the high pitch on the speakers. Or high pitch not same as sound too sharp? Maybe I get it wrong.

first, u must know the high pitch u define are normal to other people of not...if it is normal to other ppl, then maybe it's ur ears too sensitive...

if it's not, then maybe ur system really produce high pitch tat loud enuff to annoy you....

source of high pitch can have many...

1. CD/songs/recording/ripping
2. HU characteristic
3. amp characteristic
4. any pre-amp
5. speaker

y CAP/crossover and HPF wont produce high pitch:

cap and crossover are used to filter low or high freq. it didn produce any power but it reduce the powewr to the speaker...so how it gonna produce high pitch? if u found tat the sound is very sharp after place these things, it's only because u had filtered lower freq...u never increase the higher freq volumn...


way to eliminate:
as above, source check each item...
if wan save money, change tweet placement, find a place tat u feel comfortable

Yes...tweeter is the biggest problem maker.

So you are meaning that every capacitors have the same cut off point for lowering the freq?

i think u dun understand wat i mean....

cap got different cut off point for freq....but no matter how it cut, it will not produce any high pitch noise...the noise is generated by the source i listed above...

u can hear the high pitch clearly after u put a cap inside is because u are not hearing the lower freq(cut edy) which will affect the whole system sound...and the volumn and gain will affect this too

try to only install tweeter in ur car with low volumn..does it sound sharper than a car with tweet and midbass? then try it with high volumn...

What will happen when we power the tweeter from HU output direct? Will the HU knows that it is powering a tweeter? No right, it will power the tweeter like it power speakers, as HU is built for this purpose. If we don't filter the lower freq, at the end of day the tweeter will spoilt by the lower freq(bass) right? So in order to protect the tweeter a capacitor is install to it, is it right also? When a wrong rating capacitor is used when it filter out all the bass then it will be sound very sharp(high pitch) right? As tweeter can take some lower freq to have a better sound.

i really dunno how to tell u edy....since u cant understand

cap will only filter those unwanted low freq by tweeter...no matter wat value, there will still have high freq going thru...u know wat is mean HPF ? it's the same theory with HPF......

the SHARP sound will still there even u had use a cap ....

example: 4.4uf filter anything below 10k
10uf filter anything below 6k...
100uf filter anything below 2k

so i ask u, if u use highest cap value in example, then anything above 10k will still be pass thru right? so the sound sharp or not?

now u use 10uf, it sound not so sharp....but do u know it;s actually because the tweet are producing lower freq? which make the verall become more auditable.....

Seems like you are also not that understand. Now you are trying to say that a cap can choose to filter unwanted low freq? Are you meaning that if a tweeter got type A(wanted) low freq and type B(unwanted), after put a cap it will only left type A low freq. I only know that if there are some bass on the tweeter, after a cap is added, the bass will be gone or still there when diff value cap is used. On the RF tweeter that I used before, because of using a wrong value(forgot already the value) the pitch is really high until the ears can feel the pain.

On the HPF settings, if using a 2,3way coaxial speakers, if set at HPF with crossover freq control at 400hz, what will happen? Anyway I tested it with my ayam brand amp(Lightning Audio B300.4)

high pitch?
tweeter characteristic does not match with your amp
or another possible is the speaker is being underpower

Anyway...how to solve this problem is:
If ur HU power is 50watt-over..then, u need to put a resistor between tweeter and ur HU.That's all.DONE.

A good idea, I do used resistor to control the power input last time but I found it very hard to control because have to test few ratings. Futher more I do came across that some people in forum will say it will make the HU more hotter. I do believe them initially but later think back again it is not true as the HU's output power is not constant(following HU's volume) if put a resistor before the tweeter it will not heat up the HU.
Anyway I found a better way to control the power to tweeter, put a bulb before the tweeter(on some case before a capacitor)