I claim 3 types of drivers as Budget audio-phile
Complete has 4 types; I'm missing the mid-drivers. For those that have them:
^&*Most pop songs have decided on the 2(woofer+tweeter) or 3(tweeter+woofer+subwoofer) type
tweeter
middle
woofer
subwoofer
The original Apple Earbuds took off for covering all 4. Now look up bluetooth.
















