martinkruit wrote:
But when you filter (24 db) the sub at 150 hz the minus 3 db point will be at 167.5 Hz. then you can filter your mid at 200 hz. in that case the minus 3 db point is also at 167.5 Hz. combined the two minus 3 db point will give a boost off +3 db, so your frequence responce will be flat.
this is really cool understanding how it works.
The only thing that i'm not so clear is the 200Hz part.
If we use the same 24db xover then wouldn't the -3db point be somewhere higher then 167.5Hz or closer to the 200Hz.
If i understand correctly,in order for both the -3dbs to meet the 200Hz has to be reduced to like 185Hz or by applying a less steeper xover and stay at 200Hz.
I could be completely wrong with this, but just trying to figure out here...
" If u know the rules, then u can break them " - Vidal S
hmmm I understand what you're saying martin, but I still have my doubts about it. some filters and a spectrum analyser should solve this problems offcourse, because then you can examine both filters (a 24db/oct and an 12db/oct)...
@ eyesofra: yep, it's what martin said, because I put the sub in the thrunk (like most people do?!) I must play with my active filters. 18db/oct was the best filtering that I could do to match the sub with the speakers
MINI COOP wrote:
@ eyesofra: yep, it's what martin said, because I put the sub in the thrunk (like most people do?!) I must play with my active filters. 18db/oct was the best filtering that I could do to match the sub with the speakers
how do u determine the matching phase man , do u use any analyzers or purely by listening ?
" If u know the rules, then u can break them " - Vidal S
martinkruit wrote:
But when you filter (24 db) the sub at 150 hz the minus 3 db point will be at 167.5 Hz. then you can filter your mid at 200 hz. in that case the minus 3 db point is also at 167.5 Hz. combined the two minus 3 db point will give a boost off +3 db, so your frequence responce will be flat.
this is really cool understanding how it works.
The only thing that i'm not so clear is the 200Hz part.
If we use the same 24db xover then wouldn't the -3db point be somewhere higher then 167.5Hz or closer to the 200Hz.
If i understand correctly,in order for both the -3dbs to meet the 200Hz has to be reduced to like 185Hz or by applying a less steeper xover and stay at 200Hz.
I could be completely wrong with this, but just trying to figure out here...
You're right, to get at the -3dB at 167.5 you have to start at a different frequence
MINI COOP wrote:
@ eyesofra: yep, it's what martin said, because I put the sub in the thrunk (like most people do?!) I must play with my active filters. 18db/oct was the best filtering that I could do to match the sub with the speakers
how do u determine the matching phase man , do u use any analyzers or purely by listening ?
I use a track from a sq competition disk (in the benelux: EMMA SQ). this track goes from 20khz to 20hz. my frontsystem goes from about 70-80hz to 20khz, the sub goes from 100 to 20hz.
when your system is not in phase you will hear that the subbas will go to the thrunk (because, there he's located ), so the stage of the music lays not completely in the front.
If your phase is good, you will hear that the subbas stays in the front...
offcourse listen to music to, you will hear that the kickbas & bas wil be a lot smoother when the speakers are exactly in phase
MINI COOP wrote:
@ eyesofra: yep, it's what martin said, because I put the sub in the thrunk (like most people do?!) I must play with my active filters. 18db/oct was the best filtering that I could do to match the sub with the speakers
how do u determine the matching phase man , do u use any analyzers or purely by listening ?
I use a track from a sq competition disk (in the benelux: EMMA SQ). this track goes from 20khz to 20hz. my frontsystem goes from about 70-80hz to 20khz, the sub goes from 100 to 20hz.
when your system is not in phase you will hear that the subbas will go to the thrunk (because, there he's located ), so the stage of the music lays not completely in the front.
If your phase is good, you will hear that the subbas stays in the front...
offcourse listen to music to, you will hear that the kickbas & bas wil be a lot smoother when the speakers are exactly in phase
On the listening position.............................
