Quoted from Mr_Tantrum:
I'm speaking from actual firsthand experience with my Getaway, and everything I stated is accurate. I can't tell you want a great disappointment it was after replacing the speakers and playing my first game. I literally could barely tell the difference even though my old cabinet speaker cone was busted. Adding in the L-Pad helped a little since it allowed better control, but if you expect you are going to all of a sudden get noticeably better results just by replacing the speakers when the source audio doesn't change (i.e. midi-sounding, mono, low kHz, low power from driver board, etc.), you will be greatly disappointed.
However, if the plan is to someday upgrade your sound board then you'll definitely want to upgrade speakers at some point, and a budget set will probably suffice for most owners.
I wasn’t at all disputing you. Getaway is a pre-dcs game with a low quality soundboard and highly compressed mix. You would have had a much different experience if you had the same experimentation on a DCS game.
For instance, on my Shadow, just changing the speakers with the original soundboard has brought it to life. I have bass that fills the entire cabinet and much greater range in my backbox which no longer sounds muffled and low fidelity. All with a $40 speaker upgrade.