The biggest you can go in the front is 6.5 that is also for components too. In the back the biggest you can go is 6X9. Hope that helps. I dont know what was up with those MTX im guessing cuz ive never heard of "myx" but you may want to just drop down to 5 and 1/4 those are the most common for any Honda plus you dont lose THAT much of anything it just fits better. Some recomendations for speakers...any Alpine, Pioneer, or Kenwood would be perfect.