Nice, your explanation is very clear. I have never use a solid state amp so for me is difficult to compare the potency of tube amps and transistor amps. Probably, I will use this speakers in a 2x12 cab:
http://profesional.beyma.com/pdf/12GA50E.pdf Keeping in mind its characteristic I think the 1000 could be a good if it is as powerful as you say. Thanks for your answer.
Yeh - its not easy. There was a thread way back when about tube watts v SS watts.
Basically a tube amp is not clean - its compressing and saturating when pushed, but its power is measured clean before that happens. a 50w valve amp can actually be putting out closer to 100w when fully open. A SS on the other hand needs to stay well within its power limits (does NOT want to be clipping) so needs generally 3db headroom (thats half its power !!) to account for spikes.
You can see from that, that as a 50w valve amp can put out 100w, and as a SS amp needs headroom it would need to be rated at around 200w to put out the same max power CLEANLY (ie not getting nasty) - so typically a SS amp needs to be rated at 4x the power of a valve amp to get the same volume from. Also as a SS amps output changes dependant on load - that needs taking into account.
GENERALLY SS amps are rated into 4 Ohms (not always so check what load the stated power is messured at). The power then drops by roughly 1/3 everytime you double (or half - if say the rating is at 8 Ohms but the amp can power 4 Ohm loads) the load. So a 300w amp into 4 Ohms provides closer to 200w into 8 Ohms, and 120w into 16 Ohms.
As you can see - thats a lot of calculation - and a need for understanding. It also means that to provide equivalent volume (worse case) to a 50w valve amp into a 16 Ohm cab, the SS amp (assuming its rated at 4 Ohms as normal) would need to provide 200w into 16 Ohms, which is 300w into 8 Ohms, which is 450w into 4 Ohms - so a 450w ss amp = 50 valve amp for volume (roughly) IF you uise a 16 Ohm cab (an 8 or 4 Ohm cab the SS amp would be louder). Thats what leads to the often quoted "valve watts are louder than SS watts). There not - a watt is a watt, but you can see why that myth has taken hold.
The 1000 provided 500w into 4 Ohms - so has roughly the same max volume as a 50w valve amp (and is why Matrix's MODULE is called the G50 - its the same power section as the GT1000 but is names "50" as it equates to a 50w valve amp in the worse case - ie a 16 Ohm load). The GT1600 is 800w into 4 Ohms, so closer to a 90w valve amp in max volume.
Of course the Max volume were talking about is CLEAN volume - where as the valve amp wouldnt be (and why they sound different - not better, not worse, just different).
Hope you understand that, and it helps.