Speaker Volume

Your meter lies. Get a new one. Very few systems can do a real 105 db comfortably.

I agree completely.

And that is especially likely to be true in the case of a stand-mounted two-way two-driver speaker whose largest driver is 7 inches, as is the case here.

Specifically, measurements of the speaker that were published by SoundStage indicate a sensitivity of 86.9 db/2.83 volts/1 meter, and an impedance that is around 4 ohms in much of the bass and mid-bass regions, where lots of energy is typically required. 2.83 volts into 4 ohms is 2 watts, which is 3 db greater than 1 watt. So the efficiency of the speaker is 83.9 db/1 watt/1 meter.

The amp has an IHF dynamic power rating of 260 watts into 4 ohms. A "dynamic power rating" means that an amp can only put out that much power on brief dynamic peaks, not continuously.

Plugging those numbers into this SPL calculator, assuming a listening distance of 9 feet and also optimistically assuming 3 db of "room gain" due to placement within "2 to 4 feet" of a wall, results in a calculated SPL at the listening position of 105.3 db.

That would only be on brief dynamic peaks, and it assumes that the speakers are not being driven so hard that their behavior becomes significantly non-linear, for example as a result of "thermal compression." Given the optimistic nature of those assumptions, and given also that the speaker has a "maximum input power" spec of 150 watts, expecting even 105 db from those speakers on anything more than very brief and very occasional dynamic peaks is highly unrealistic.

And there is no way those speakers could ever come close to 110 to 115 db. If fed enough power to theoretically reach those levels, their drivers would blow.

If you really want to reach those kinds of levels you’ll need speakers that have much greater sensitivity, while also being able to handle copious amounts of power, and being able to provide good sonics while doing so. Which most likely means **some** (not even most) large floorstanders. 

Good luck. Regards,
-- Al