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Rovin wrote:very 1st type of ports i ever did was circle ports [easiest thing to do-simply put a piece of pipe in a box even b4 i knew what tuning was] , i built many boxes & tried alot of stuff over d yrs that i noticed it a loooooong time ago , research & reading up on d science of it confirms my own real life experiences ...
https://www.youtube.com/watch?v=jN-E1dfMfO0
https://physics.aps.org/articles/v8/94
Rovin wrote:very same video i posted a lil higher up in this thread, at d time i was feeling lazy to embed it... is no scene if others didnt notice itRovin wrote:very 1st type of ports i ever did was circle ports [easiest thing to do-simply put a piece of pipe in a box even b4 i knew what tuning was] , i built many boxes & tried alot of stuff over d yrs that i noticed it a loooooong time ago , research & reading up on d science of it confirms my own real life experiences ...
https://www.youtube.com/watch?v=jN-E1dfMfO0
https://physics.aps.org/articles/v8/94
rollingstock wrote:That size enclosure it's better to go sealed. Port noise is gonna be terrible with that small port. May sound okish at low excursion.
Rovin wrote:based on what u typed something doesnt seem right , no way a 29 or 3hz tuning wud use such a short port for such a small cuft
double check ur calculations with this https://www.the12volt.com/caraudio/boxcalcs.asp
also - common local pvc pipe is never 2" or 4" , 4" is actually 4.3" ....
rollingstock wrote:The pioneer should be about 300wrms @4ohm
The 4 channel is 100x4 @4ohm, around 150x4@2ohm, so roughly 300wrms @4ohm bridged.
So in theory they should sound comparable. I reality the pioneer mono should sound better, the Zeus is playing at its lowest impedance rating, thd would be higher. The pioneer amps are underrated and thd should be low at 4ohm.
I think your settings somewhere is off. Was the mono bought used.
rollingstock wrote:Don't take this wrong but I believe the problem is you. And not having the knowledge or grasp of what you're doing.
rollingstock wrote:The speakers are single 4 ohm each?
jackal wrote:rollingstock wrote:The speakers are single 4 ohm each?
Yep!
jackal wrote:rollingstock wrote:Don't take this wrong but I believe the problem is you. And not having the knowledge or grasp of what you're doing.
Maybe so, but I doing much better than those people who calls themselves professionals.
SR wrote:https://www.pioneerelectronics.com/PUSA/Car/Amplifiers/GM+Digital+Series/GM-DX871
If its this amp it does 500@ 2 ohm not 600
rollingstock wrote:jackal wrote:rollingstock wrote:The speakers are single 4 ohm each?
Yep!
Are you wiring the subs parallel or series?
8Ohm load for the bridged 4 channel is ok but you have to wire to 2ohm for the mono
rollingstock wrote:My advice go by a professional cause I'm convinced you're doing chit and blaming the equipment.
rollingstock wrote:How are you wiring both subs to the 4 channel? I'm guessing two channels bridged per sub? So each bridged channels seeing a 4 ohm load?
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