Remember that loudness relates to Sound Pressure Levels (dB spl) and Amp's Power rating is just barely related to it.
If you need to more volume in your rig you must check your Cabinet's Sensitivity. It relates dB with Wattage and Distance to the Speakers (in Brazil we use Meters) -
dB@W/m.
If you simply get one better rated sensitivity Cab you'll get all the loudness you're looking for.
Remember that you must get at least one Cab 6dB higher than your current one. Think like 6dB meaning double louder. This isn't looks much, but is the difference between barely hearing and definitively perceiving your Bass.
IMO, it seems easier to get louder like that than buying a more powerfull Amp Head.
To get that same extra 6dB you would have to get something like 4 times more power on the Amp. That means if you find 200W Power Amp too little to your needs, you would have to get a 800W Amp to get that same 6dB improvement! And if you need more loudness than that, you would need something greater than 1600W!
That's a lot of Power, don't you think?
But you can always buy a new Cab. Many Combos have shy Sensitivity ratings (isn't unusual seeing Combo Amps showing values below
90dB@W/m). If you buy some of this new Neodimium Cabs from Epifani, GK or Eden - almost all companies offers some model like that - you'll be able to easily improve your loudness on 10~12dB with the very same Amp... And they're smaller, too.
Check this out.
