
The CS Series delivers remarkable performance and ultra-clean bass, utilizing a heavy-duty motor/magnet structure featuring EVC (Extended Voice Coil) technology not found in stock speakers. They use polypropylene cones with tough, ribbed, UV-treated surrounds for precise linear excursion and reliability. Geek Squad® Installation Recommended. Visit your local Best Buy store for more information. 
Q: What does 2-way or 4-way speaker mean?
A: A 2,3 or 4 way (co, tri, quad-axial)l speaker is a speaker with two, three or four built in components. A component speaker set contains individual units that each provide either a specific direction or frequency of sound. For example, a tweeter, mid-range speaker and sub-woofer would all be separate components within the set would be a tri-axial or 3-way set of speakers. That said 2-way (co-axial) contains a mid-range cone in addition to a tweeter (2 components) cone for high-frequency sound 4-way (quad-axial) has a bass and mid-range cone as well as two tweeters (4 components). The extra tweeter gives these speaker better high-range sound.
Q: do these come with two speakers or one ?
A: 2 speakers
A: Your front door speaker size is a 6 3/4 inch speaker so they will fit the front just need a mounting bracket that size so you can fit the 6 1/2 inch kicker in your doors. Which Best Buy should have in stock at there store. As for the back speakers they should be 4 x 6 inch speakers so just grab a matching set of kickers in that size n you should be good to go
Q: do these speakers fit in a mazda cx-5 2014? without adjustments?
A: They should. They have a relatively shallow mounting depth. They may need mounting brackets but no other modifications. You can check if the will on cruthcfield or even on the best buy site if they are a fit.
A: These are conventional speakers.
A: Either one is fine I have them in my 300ZX
Q: What’s a good frequency level for a crossover
A: undefined