I have been having some issues building a decent box because of the lack of trunk room or a decently shaped trunk to be perfectly honest. All the boxes I have built have taken into account the woofer for displacement. What is the difference between regular mounting vs having the magnet portion on the outside of the box? Will it sound different if the box is built to specifications? Will it move less air or something?
Impedance is Futile!
Now thats a promotion I can get behind! And on top of....and on the side.....
just dont factor in the subs volume displacementů mostly everything is everythang besides thatů
I Design Custom Enclosures
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It has been remarked that if one selects his own components, builds his own enclosure, and is convinced he has made a wise choice of design, then his own loudspeaker sounds better to him than does anyone else's loudspeaker. In this case, the frequency response of the loudspeaker seems to play only a minor part in forming a person's opinion.
1996 Pontiac Trans Am Planned
35% front windows (legal) and 25%~ rear window What is done:
Kenwood MP4028 HU running Blaupunkt Components Front & Back
Kicker ZR240 bridged @ 2 ohms ~300rms to 1 10" Type R in 1.75 cu ft tuned to 30 hz
Okay so here is a pro and con.. You have the same size box, and with the displacement of the Speaker outside of the equation, you basically get more box. Now, the con is the fact that if the sub isn't put together well you will get motor noise and it will sound crappy.. Also, if tinsel leads slap for some reason on your sub then you will most likely be annoyed that you can hear that too.. Just make a box that is right for your sub the conventional way, then try it with the magnet out and you will get maybe a... 3hz lower tuning? it will be enough to notice on paper but probably not enough for you to know of unless you hear tinsel leads slapping against the cone... not a pretty sound..
it wont change the output in any way at all.. the only thing that changes is the displacement.. since the woofer isnt in the box in anymore, it goes back to the displacement it was before the woofer was in it.
i ran my sub like this for about a week, just fine:
Would it be safe to run a 12" Type R inversed completely upside down?
It seems like a pretty sturdy subwoofer.. How audible is tinsil noise? And would motor noise likely be a problem?
I'm interested because I made my box 1.96ft^3 before displacement, and I wish I went bigger.. The bit of extra room may help.
Does anyone know the displacement of a 12" Type R??
Sorry I don't know the displacement.. And yes it will be perfectly fine to run one inverted. If there is tinsil noise and motor noise, you will know it and it will eventually get annoying.. Don't run them very loud and the motor noise isn't bad, also you can bend the tinsils enough that they don't slap but too much and they may break so be careful. Yeah, i'll guess you can get a good .03^3 out of the box if you run the sub inverted but I won't make a promise there because like I stated I don't know the displacement of a Type R but I will promise you it will give you just about all of your 1.96^3 back if not a bit more due to the dome shape as someone else stated.. you may get 1.99^3 out of it in the end.
if you have a small box then inverting the sub may make a little difference. i used to have (2) 10" P1's in a cheapy small box and when i inverted them they were a tad louder, but mainly it seemed like they went lower, and moved a little more air than before. but it was probly b/c of how small the box was
-alpine CDE-9843 HU
-820w power acoustik amp
-sub thump dual 12"box
-(2) 12" JL Audio W1v2 8 ohm
-Rockford 4x6 front speakers
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