For the expirienced...
|
Gold Member Username: BlainewPost Number: 1339 Registered: Nov-05 | the impedance rises as the box gets smaller correct?? |
|
Gold Member Username: RovinTrinidad & T... Post Number: 8360 Registered: Jul-05 | do u mean TUNING ? ..... |
|
Gold Member Username: BlainewPost Number: 1340 Registered: Nov-05 | im tralking about box impedance rise..... depending on the box, the impedance that the amp is presented with is different than how you actualy wired your subs, i jutst cant remeber if the smaller the box, the more impedance, or the bigger the box. i gues i could ask, does a sub need more watts to go to full excursion in a small sealed box, and less watts in a large ported?? |
|
Silver Member Username: FiberPost Number: 238 Registered: Mar-06 | uhhh.. |
|
Gold Member Username: TjmutlowPost Number: 2557 Registered: Sep-05 | a box size has nothing to do with impedence. how subs are wired only.... |
|
Gold Member Username: Matt12490Benicia, California USA Post Number: 1073 Registered: May-05 | ...and that would be why it says for the experienced only... |
|
Silver Member Username: QuigPittsburgh, Pa Us Post Number: 222 Registered: Sep-05 | lol....wow... wait blaine ur just joking rite? ur a gold member u gotta be joking.. |
|
Gold Member Username: Chaunb3400Huntsville, Alabama U.S. Post Number: 7951 Registered: Jul-05 | If u have lots of posts..u have at least been around..for a while..so u no a thing or 2....just from reading the fourm |
|
Gold Member Username: BlainewPost Number: 1341 Registered: Nov-05 | if you cannot answer my querstion please dont post....not to be an a@@ hole, but the impedance that the amp is presented with does in fact depend on the box too. and im pretty sure that the smaller the box, the higher the impedance. this is the one topic that people really dont know much about, but i would not just make this up. it was discussed awhile ago, and everyone posted things like "wow i didnt know that" i do know that a box can affect impedance, but i couldnt remember if the small boxes make the impedance go up or down.... |
|
Gold Member Username: 54danny54Betsy layne, Kentucky..GO... USA duh Post Number: 2721 Registered: Nov-04 | well blaine...im not sure if it has to do with the size...now i do know that whenever it starts to reach its Fs, the impeadence will start to change. just google impeadence rise to see if it shows anything |
|
Gold Member Username: BlainewPost Number: 1342 Registered: Nov-05 | i wasd reading a thread here, and it does have a little to do with tuning, and when a sub hits a certain frequency, but you will never really get EXACTLY 1 ohm, so that is why the jl 1000/1 is so good, bc box impedance rise will have no affect, and you will get the real 1000 watts but i still am not sure, if the impedanxce goes up with a big or small box, ive heard both things |
|
Gold Member Username: BlainewPost Number: 1343 Registered: Nov-05 | https://www.ecoustics.com/electronics/forum/car-audio/212558.html it does have a little to do with tuning |
|
Gold Member Username: 54danny54Betsy layne, Kentucky..GO... USA duh Post Number: 2724 Registered: Nov-04 | it would make sense that a bigger box would...i mean think bout it... i dont really worry much bout it. |
|
Silver Member Username: QuigPittsburgh, Pa Us Post Number: 225 Registered: Sep-05 | so ur telling me... if u take an ohm meter... speaker out of box and for example u have any speaker... SVC 4 ohm... attach one probe to neg n pos, it reads around 4 ohm... u put it in a box then test it again its gona change??? |
|
Gold Member Username: BlainewPost Number: 1344 Registered: Nov-05 | no..wont change when your testing it. the impedance will change depending of the frequency of course..... and the box too |
|
Gold Member Username: JakeyplaysbassSt. Louis, MO Post Number: 1189 Registered: Jul-05 | the impedance changes in every setting, temperature, and enclosure. blaine im not sure if theres a set rule that says in a small box it will go up and a big box it will go down or visa versa. you might want to check glasswolfs site and see if he has anything about it. if your really worried about it just get a tube amp and wire it to any ohm.  |
|
Gold Member Username: JakeyplaysbassSt. Louis, MO Post Number: 1190 Registered: Jul-05 | http://www.hometoys.com/htinews/feb04/articles/polk/impedence.htm sweet site. its helpful and the graph is pretty cool. |
|
Gold Member Username: SouthernrebelMonroe, Louisiana USA Post Number: 3039 Registered: Mar-04 | usually the impedance rise at a given freq will be lower w/ a smaller box...larger boxes tend to increase imp rise. ex: 3cuft box tuned to 40hz...1ohm DCR...2.75ohm rise at 42hz. 5cuft box tuned to 40hz...1ohm DCR...3.2ohm rise at 42hz. but this is just a vague example. your impedance will change as freq changes (heat will also cause imp to rise). your highest imp rise will be right at or just above your boxes tuning. hope that helps alil. |
|
Gold Member Username: BlainewPost Number: 1345 Registered: Nov-05 | thank you |
|
Gold Member Username: HdubbFarmington, Nm Usa Post Number: 2054 Registered: Nov-04 | yeah marshall is right. the bigger the box the imp.rises, and the imp. changes with the freqs as well so it would seem as if you arent getting the complete power from your amp. i think i was reading that sometimes the impedence can rise all the way up to 40ohms and what not. i read this somewhere on a very old post. you might try a search or going back throught the archives.its a lot of work though. and the search here sucks |
Main Forums
Today's Posts- Home Audio Forum
- Home Video Forum
- Home Theater Forum
- Car Audio Forum
- Accessories Forum
- All Forum Topics