What speakers will fit?

MaysEffect

You do or don't have the speakers yet? The 6 1/2 is the largest circle size you can fit, 6 3/4 is the most popular size as you can fit them in incorrect size adapters and spacers. You can also fit a 6x9 or 6x8 component speaker, these are not that popular anymore, but JL and kicker made some of the best when they were.

5 1/4 and 1/2's are generally aimed towards larger systems that have dedicated subswoofers and mid range drivers as they have deeper cones per depth, resulting in slightly tighter, more accurate low bass and mids. The larger inch or so may throw out a bit more bass as a "do it all" speaker though, thus 6 1/2's are recommended for basic systems.

Quicksilvers

I have not purchased any speakers yet because I want to know what speaker size will bolt right in and have the best fitment without using a spacer adapter before I purchase anything. I am considering the Kicker 6 1/2" speakers for the front doors. Any thoughts?

MaysEffect

I believe the factory size is a 6x9. You will need an adapter to use any component circular speaker. There is no problem with using one, just make sure its the right size for whatever speaker you change to. The recommended size would be something smaller than a 6 inch. so yes, 5 1/4 is the most adaptable size.

Quicksilvers

Ok if a 5 1/4" speaker is the most adaptable size then I will get this size then. What vendor can you purchase spacers if needed for 5 1/4" front door speakers for the 370Z?

TreeSemdyZee

The Blose speakers are 6x9, the base are round. 6 or 6 1/2. Something like that.

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MaysEffect

So it seems. From the pics i've seen, the speaker looks like a 6 1/2 in a oversized adapter/spacer

This was posted in another thread years ago.

This seems to be the standard adapter across multiple nissan/infiniti cars.

If you have the Bose 6x9, a 5 1/4 would be an easier installation just by using a 6x9 to 5 1/4 plate adapter.

Where as this type you will need a adapter/spacer of unknown length. Most high powered drivers have a 2.5-3.5 inch mounting depth. The shallow depth drivers usually cost significantly more for the same total output (neodymium magnets, wider basket). They also inherently sacrifice a bit of bass impact because of the shallow cone depth.

Quicksilvers

I know that fitment can be an issue with the rear magnet on the speaker interfering with the window. I spoke to the audio road shop regarding what speaker size would have the best fitment for the Nissan 370Z and they agreed with people on this forum that a 5 1/4" speaker would have the best possible fitment. I know they are smaller speakers but, I am looking for what fits best overall. They ordered Kicker KS series 5 1/4" speakers with Kicker 1" tweeters,and Kicker crossovers. The magnet on the Kicker KS series speakers are pretty flat and not too big. Cone size will not be a issue. I am just trying to figure out what spacer would be best to go with going with the 5 1/4" Kicker speakers? What speaker adapter plate size and brand should I go with that will fit in the front doors in my 370Z?

Quicksilvers

Links anyone on where to purchase adapter plates?