Opel Club Finland (OCF)

Mrop kirjoitti:eieikoteloa.

tukevasti kiinni vain, ja oven sisusta jollakin vaimennusmateriaalilla umpeen. esim silentcoat on hyvää ja helppoa tavaraa.
se muovi tiukasti liimalla kiinni tai sitten leveellä teipillä, ittellä tein uudet muovit rakennusmuovista ja 15cm leveestä teipistä. muovin alle kaksipuolista jotta pysyy.

tukevasti todellakin kiinni,mutta ite tekisin soviterenkaan vanerista ja se ruuveilla oveen kiinni ja väliin esim sikaflex massaa.
en todellakaan laittaisi teipellä kiinni jos tukevan asennuksen haluaisin!

jakosuodin pitäisi mahtumaan poikittain ihan oven alareunaan, ilman, että ikkuna ottaa kiinni joten vedä sinne vain input piuha vahvistimelta. oven omista läpivienneistä paras vedellä ellet tee kokonaan uusia reikiä ja osta siihen oven läpivientikumeja noita haitariputken näköisiä josta sisältä vetelet piuhan. paljasta johtoa ei kannata vedellä hajoo jossakinvaiheessa takuulla.

jos oveen tulee aktiivi 2-tie sarja niin silloin tarvii vetää vahvarilta 2 piuhaa. eikä silloin tule tuota jakosuodinta.

jos midit ei "soi" kokeile säätää aikaviivettä soittimesta jos siellä on DSP. jos ei, niin... no ne ei sitten soi

jakotaajuuksia myös kannattaa vaihdella sekä equttamalla voi jotain pientä korjausta saada, mutta etkähän ne ajan kanssa soimaan hyvin saa.

auton sisämelu rakennetaan midien toistamalle alueelle 50-250Hz. tämä on muutenkin korvalle se alue mikä soi heikoiten, sillä jos tasainen 250hz "melu" tulee korviin korva vaimentaa sen. sama tapahtuu midiäänille. helpoin ja halvin tapa välttyä vaimennukselta on asettaa kaiuttimiin jotka ovat lähinnä sinua aikaviivettä 2-3millisekuntia, tällöin ääni tulee erivaiheisena korviin jolloin vaimennusta ei tapahdu.

The term mid bass can be interpreted many ways. In car audio however this band is pretty much set as the band between 50hz and 250hz. This is due to many reasons that are beyond the scope of this article. What’s important to understand is that in the 50hz-250hz range humans are the very least sensitive to variations in frequency response but we are the most sensitive in this range to changes in phase. As frequency rises above 250hz the opposite becomes true. Humans become less aware of phase response and much more aware of frequency response.

All modern vehicles have been purposely designed to emit all of their noises in the mid bass range. From the engine to the rumble of the tires to the sound of the AC system, every device in your car has been designed to keep their noises with in the 50hz-250hz range. From Mercedes to Honda, auto manufacturers have done their homework and know that people have an inability to perceive sounds based on frequency in this range. By limiting noises to this range the car will seem much quieter and any noises made are much more tolerable. Because this frequency range is already so cluttered your mid bass drivers need to be in proper acoustic phase and all precautions taken to ensure that they are performing correctly in order to overcome this noise floor. When this is done the end result is that your brain will accept this information (music) and reject all of the cars noises.

Last but not least the easiest, fastest, least expensive, and most effective way to improve mid bass response is to simply add .4-.9 milliseconds of time delay to the left speaker. Doing this will largely correct both phase distortion and comb filtering while simultaneously increasing volume by eliminating cancellation.

Mrop kirjoitti:

The term mid bass can be interpreted many ways. In car audio however this band is pretty much set as the band between 50hz and 250hz. This is due to many reasons that are beyond the scope of this article. What’s important to understand is that in the 50hz-250hz range humans are the very least sensitive to variations in frequency response but we are the most sensitive in this range to changes in phase. As frequency rises above 250hz the opposite becomes true. Humans become less aware of phase response and much more aware of frequency response.

All modern vehicles have been purposely designed to emit all of their noises in the mid bass range. From the engine to the rumble of the tires to the sound of the AC system, every device in your car has been designed to keep their noises with in the 50hz-250hz range. From Mercedes to Honda, auto manufacturers have done their homework and know that people have an inability to perceive sounds based on frequency in this range. By limiting noises to this range the car will seem much quieter and any noises made are much more tolerable. Because this frequency range is already so cluttered your mid bass drivers need to be in proper acoustic phase and all precautions taken to ensure that they are performing correctly in order to overcome this noise floor. When this is done the end result is that your brain will accept this information (music) and reject all of the cars noises.

Last but not least the easiest, fastest, least expensive, and most effective way to improve mid bass response is to simply add .4-.9 milliseconds of time delay to the left speaker. Doing this will largely correct both phase distortion and comb filtering while simultaneously increasing volume by eliminating cancellation.

lähde:http://www.the12volt.com/installbay/for ... 9&KW=homer