Dual drivers refer to a earbud which contains 2 drivers of any type. Hybrid drivers refer usually to 1 dynamic and 1 balanced armature. The dynamic driver usually has a larger membrane size ranging from 5mm to 14mm. As such, dynamic drivers produce more bassy sounds. A balanced armature usually has a very small membrane size making it good at producing high frequencies like vocals.
We are familiar with in-ear monitors or wired cables having multiple drivers. In fact it is not uncommon to hear of an IEM having 3, 4 or even 8 drivers.
But when it comes to TWS, you'll be hard-pressed to find any with 3 drivers and above.
For dual drivers, they are present in the community, but are the rare exception and come with a hefty price tag. Take a look at the Sony WF-1000XM4, priced at $383
Other alternatives are like the Master & Dynamic MW07 Plus priced at $230
Earbuds with dual drivers tend to sound better which is often why it's pricier as well.
One thing of concern is that TWS earbuds often have limited space. Within 1 earbud it should contain a battery, a Bluetooth circuit board and the drivers. The lack of space often restrict companies from being able to squeeze in a dual driver. Hence, earbuds like Apple's airpods or Jabra's Elite 3 just to name a few are all single drivers.
Our Kagami Wireless earbuds come with a hybrid dual drivers. So you can be assured of the sound! All this while priced at $149. They are a pair of affordable earbuds with good bass.
If you are looking for the best earbuds Singapore has to offer, look no further.