Wrong section mate!
The front of the R33 does take 6" speakers (commonly called 6.5"), however every speaker is not created equal so basket size and depth do affect the speakers mounting. Making an MDF board for 6" speakers in the R33 is totally unnecessary as all you need to do is grind out a small amount from the inside and/or back of the factory speaker pod.
As for the rear, they are 6" factory too.... you can not change them from inside the boot! The rear seat and parcel tray need to be removed to access them. Having the speakers just sit on the tray is not only very dangerous, it is limiting the sound quality. If you have a crash at say 100kph, those speakers (yep, only just over 1m behind your head) will continue forward at 100kph till they hit a solid object, it may be your seat, the windscreen or your head.... The last option will most certainly be fatal.
A car speaker needs to be in a sealed enclosure to gain the most from it, having them just sit there is far from ideal.... You need a set of single or double 6x9 spacers.... To fit them you mount the speaker to the spacer then put the spacer/speaker in place, get in the boot with a drill and screw up into the spacer to secure it.
Single or double is the height, what one you will need depends on how deep your magnet is or how large it is - The spacer is only there to lift the speaker up so it doesn't foul on anything and to seal it to the tray!
I hope you got the phasing correct.... if you have an aftermarket stereo and you didn't install it OR you did install it and you don't know what phasing is and 'guessed' the speaker wiring I highly recommend you double check it! This can be done by a trained ear fading left to right and front to back or physically inspecting the wiring!
Do you need a guide on removing that rear seat? I can type one up for ya
The front of the R33 does take 6" speakers (commonly called 6.5"), however every speaker is not created equal so basket size and depth do affect the speakers mounting. Making an MDF board for 6" speakers in the R33 is totally unnecessary as all you need to do is grind out a small amount from the inside and/or back of the factory speaker pod.
As for the rear, they are 6" factory too.... you can not change them from inside the boot! The rear seat and parcel tray need to be removed to access them. Having the speakers just sit on the tray is not only very dangerous, it is limiting the sound quality. If you have a crash at say 100kph, those speakers (yep, only just over 1m behind your head) will continue forward at 100kph till they hit a solid object, it may be your seat, the windscreen or your head.... The last option will most certainly be fatal.
A car speaker needs to be in a sealed enclosure to gain the most from it, having them just sit there is far from ideal.... You need a set of single or double 6x9 spacers.... To fit them you mount the speaker to the spacer then put the spacer/speaker in place, get in the boot with a drill and screw up into the spacer to secure it.
Single or double is the height, what one you will need depends on how deep your magnet is or how large it is - The spacer is only there to lift the speaker up so it doesn't foul on anything and to seal it to the tray!
I hope you got the phasing correct.... if you have an aftermarket stereo and you didn't install it OR you did install it and you don't know what phasing is and 'guessed' the speaker wiring I highly recommend you double check it! This can be done by a trained ear fading left to right and front to back or physically inspecting the wiring!
Do you need a guide on removing that rear seat? I can type one up for ya
