CAPACITOR (TAKE 3)

IS IT parellel?
THE ORGINAL DESIGNE WILL CHANGE?[img][/img]

Yes!

For capacitor when you put parallel, the total capacitance is the sum of both.

10.1uF&10uF is not much differences, is is only~1%.

Some people say, even add 0.022uF parallel also can hear the differences/improvement...

the best way of course is u try this 2 cap in your speaker & listen yourself to decide which combination suit u....

unluckily i stay in M'sia not HK, if not u can buy the 0.1uF wima black box try it, if not suit then sell to me....

by the way, it will be easier next time u just post reply without key in the title then all our reply will be in the same post....easier for people to see the whole story also...

thank you very much
i will do it tomorrow.

Share with me the result after u had do it...

By the way twist your wire connected to the drive also can improve the detail....easy & without any cost.

thank you!

i have already bought the another coil (1.25uf ), the size which length is 7cm diameter is larger than the old one.  no enough space to set on the broad. now the coil is welding on the broad but the body of coil is out of speaker, it is temporary method . any suggestion for it?
someone told me , when the speaker is running , the coil have a little vibration, is it true?
thank you

i finish one speaker . the sound get more detail, but i found a litte problem,我發覺有些( like spark sound ),這些聲音不多,是否在焊接時有問題?還是換上的parts過勁?

Hi,
do u take photo after u do the modifiaction? if yes pls post it, easier for us to have  a look!
When the speaker on, the woofer's sound wave will cause the whole speaker cabinet to vibrate as well, thus if your coil is not at a fix position it definitely will vibrate. since not photo i can't see your exact situation now. But generall you can fix/hold the position of the coil by using some plaster glue (normally blue or green colour) which people normally use to place something on the wall or the silicon (use for fix aquarium).

if got sparkling sound better check your soldering or connection whether it had tough/short circuit, since your coil is hanging, becareful when it vibrate and touch other component...(if some of ur component very near n loss, when speaker on at loud, vibration increase it me tough then u may heard spark when it touch.... make sure all the connection n soldering is tight....

u place the 0.1 wima at both cap or only the cap for the high frequency?

Hi dogman,

longtime didn't hear from you. Any updates of your modification of the speaker?

yes ,  i haven't add the black box , because the performance is not good. now  i only change the 2 solen and a coil ,the sound has a wonderful change , it need a little time to run in , but i think that is my good experience.
this week , i bought a new LCD tv & New AV amp , when i complete to assemle my new toys , i will post some picture for sharing

thanks for sharing,

what's the coil brand u use now??

dogman,

If u feel that parallel wima black box 0.1uF too sharp...u might try to parallel with 0.022uF VISHAY ROE MKP 1845, i parrell it with solen mkp-fc in my cdp, good match detail increase and sound won't be too sharp.... i think 0.022uF mkp1845 is ~hk10.

i think that is right, i will change to try it

ok, hope can hear your feedback later....

after running in the speakers, everything is ok. i feel that the mass of sound is richest than before. if the sound get more detailed , i think that is my perfect speakers, and my new toys(marantz av amp ) perform excellent, because marantz is my favorite. now i will post some picture to share

[img][/img]

the way u place your speaker a bit weird, is the sound balance? since 1 at stand another at the table.....

u r now using solen cap without parallel with any cap right?

yes , i use the solen cap without  parallel. when i add it to parallel , the song make some ("pak...pak...") sound from the singer, so i haven't use the wima black cap, i guess the value of cap is too big (ohum).  the design of circult can't support ........
the position of speaker is ok, because my chair is in the centre

this technique is call bypass cap. It's to parallel another smaller value, higher voltage cap along a big cap. This has been proven to be widely used in electronics circuit.

There are however a couple of criteria when choosing bypass cap. It need to be NON Polarised cap (mundorf mcap, solen).

By putting a parallel cap, u r bringing down the crossover frequency also. This can be dangerous as u might cross it too low for ur tweeter to handle. try not to exceed 1%. This should explain why u hear 'pak pak' on ur tweet. You might want to try 0.01 uF 400v non polarised cap, get Mundorf, they are cheap enough to try.

vincent,

u seems got a lot experience in this.

May i know whether u had try bypass the small cap at the reservoir power supply cap?

i heard using 0.47uf Blackgate NX Hi-Q on reservoir (e.g 10000uF) is useful, what do you think? do u think by pass a polypropene cap like ROE MKP 1845 on the reservoir will be better than blackgate NX hiQ as BG is the e-cap.

by the way do u think the by pass should be done only for tweeter or also for mid/woofer?

yes i have tried bypass the power supply.

In power supply, for example 10,000 uF, i'll normally by pass by using one 100uF and one 0.1 uF. I normally take 1% - 10% of the big cap for by pass. (10,000 uf, 100 uf, 0.1 uf)

It does help to take out current ripple. Once it run in, u can notice a more quiet background and smooth flow music. I'm not particular in the brand. However, blackgate, elna, Oscon, panasonic FC, auricap, wima, ero are some of the normal caps i normally use. As long as there is bypass cap, it should be good enough.

Btw, blackgate takes like 100 hours to burn in to be able to hear the difference.

That is for electronic circuit, however, my experience of bypassing cap in crossover is not always the same. I have had experience bypassing a tweeter with 0.01uF, 0.022uF and still it doesn't sound as good as no by pass.

Sometimes have a bit of improvement, but not much. You can try, but the result is not always plesant. It's up to you to determine if you like it or not.

You can do for tweeter and see if you like the result. If not, by pass the woofer also. If you still not happy. No point of by pass at all. No doubt, by passing the tweeter and woofer will have some changes in the sound. The question is do you like the change or not

噤似一城

我覺得對speaker stand 要落釘, 噤低頻會收得靚d , 連帶高中都靚 8)