I recently got a Peavey Valveking 100 amp head. This is an all tube amp and registers 100 watts or 16 ohms (But it has a switch for 4, 8, or 16 ohms). Since I don't have a cabinet, I plugged it into a 200 watt Randall combo amp. The randall speakers max out at 4 ohms (I had the switch on 4 as well), so I have to turn the head's volume up around 7 or 8 to match a drumset. This isn't a problem when I'm using distortion, but the tubes start to distort around 6 when it's clean.
As for the point of this, will buying a 16 ohm cabinet solve this problem? This might be common sense, but I'm still learning about halfstacks. I expect powerful speakers to allow me to reach the same volume with the master turned down, but some confirmation would help.