The Landmark 300 head is basically 1 channel of our RBI and 1 channel of our RPM rackmount preamps. The new VT Bass head is two discrete channels of our popular VT Bass pedal. You can run them as two different sounding channels and you also have the ability to blend both channels.
It seems we went through this wattage thing a couple of months ago. The 300 watt power section that is also used in our Landmark 300 is a great sounding and dependable amp.Plus there is no limiter circuit as there is in most digital amps so the power section of the VT Bass head is running wide open. It was designed so that even if the amp is run to the point of clipping it will behave like an overdriven tube amp and this increases your usable power. Just like a Marshall 100 watt tube guitar amp is rated at 100 watts clean it can run at 200 watts when distorted. The difference between 300 and 600 watts is 3dB in sound level. It really comes down to your speaker cab, amount of speakers, efficiency of speakers and the impedance that the speakers present to the amp.
For most applications the power is more than enough power. If you're playing on a concert stage your bass sound will be pumped through the PA and your bass amp will serve as your monitor. You really need to evaluate for yourself how much power and headroom you will ultimately need and match your components (bass amp, power amp , speaker cab) accordingly.