Will they fit in a miata

I can't answer that. If you go to Crutchfield.com you can find a fit chart by vehicle.

Do these come with the speaker connectors or do they need to purchased separately?

They should be purchased separately. Normally you would be installing these in an aftermarket upgrade and use your new wiring. Most amplifier upgrade kits come with connectors, or you can get them at any hardware/electronics shop or here for just a couple bucks. The reason they don't come is that they would have to match the wire gauge you were using in the system. You would want to get both narrow and wide female spade connectors, or solder the wire to the speakers leads directly. If you are going to connect them to the stock wiring and need adapters, There is a company called Metra that makes wiring harness adapters that work well. I have done both with good results. Also, make sure you use the included capacitors on the + lead or buy "Bass Blockers" to prevent low frequency signal from damaging your speakers. These can't take low base and you will ruin them if you do not have some means of cutting off frequencies below about 100-200 Hz or higher. If you are using an aftermarket amplifier, it would normally have a High Pass filter setting that allows this, and you would then not need the capacitors. Your OEM amplifier, if there is one in your system, may also have this capability, but it is not always easy to find out it if does or not. It is NOT likely that a system that is has radio/CD player without an extra amplifier has this but a little research might be worth it.

ASIN	B002CMYVLI
Additional Features	tweeters
Age Range Description	Adult
Antenna Location	car
Audio Driver Type	Dynamic Driver
Audio Output Mode	Stereo
Battery Average Life	5 Hours
Best Sellers Rank	#57,175 in Electronics ( See Top 100 in Electronics ) #30 in Car Component Speakers
Brand	Infinity
Built-In Media	2 Subwoofer
Compatible Devices	Car Audio System, Smartphone, Tablet
Compatible with Vehicle Type	Car
Connectivity Protocol	Coaxial
Connectivity Technology	Bluetooth
Control Method	Voice
Controller Type	Voice Control
Customer Package Type	Standard Packaging
Customer Reviews	4.6 out of 5 stars 412 Reviews
Enclosure Material	Rubber
Frequency Response	20000 Hz
Global Trade Identification Number	00050667110345
Impedance	2 Ohms
Is Waterproof	FALSE
Item Dimensions D x W x H	5"D x 10"W x 5"H
Item Height	5 inches
MP3 player	No
Manufacturer	Harman Kardon
Model Name	Infinity Reference
Model Number	3032cf
Mounting Type	Car Mount
Number Of Circuits	2
Number of Audio Channels	2.0
Power Source	Corded Electric
Series Number	3032
Speaker Maximum Output Power	75 Watts
Speaker Size	3.5 Inches
Speaker Type	Bookshelf
Specific Uses For Product	car
Subwoofer Connectivity Technology	Wired
Subwoofer Diameter	3.5 Inches
Tweeter Diameter	3.5 Inches
UPC	050667110345
Warranty Type	Limited
Water Resistance Level	Not Water Resistant
Wireless Technology	Bluetooth
Woofer Diameter	3.5 Inches

Infinity Reference 3032cf 3.5-Inch High Performance Two-Way Speaker, 75 Watts (Pair)

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