[Kennekam]

Does the GLS have a subwoofer? If so, where is it located?

[MR2-Blue]

No, it doesn't.

[Allegro]

Buy the Gen 4 GLS it comes free with a Rockford Forsgate amp and sub

[Mcnoogle]

Rockfort Fosgate is an awesome brand,
back in the day when car sound was my big thing, this was the best product out there,
partly because they themselves underrate their output by some 20%,
Just damn expensive.