Ok I gave it a shot (Pasted Excel version below):
| ENTER DATA | | | |
Efficiency | 96 dB | | Speaker efficiency, at 1 Watt Input Power, measured at 1 meter | |
Power | 100 W | 20.0 dBW | Amplifier power, in Watts per channel | |
Distance | 10.50 ft | -10.2 dBW | Distance, in feet, from front of speakers to listening area | |
Qty | 2 | 3.0 dBW | Enter quantity of speakers (typically 2), assumed to be powered by the same watts per channel and same distance | |
| | | | |
| | | | |
Peak SPL | 108.8 dB | At listening position | | |
The efficiency of my speakers are 96, 97, 98 (Bookshelves, Center, Tower respectively). I punched in the lowest efficiency figure. I am confused about the wattage; I put in 100 watts and 2 for Qty because I could only find the spec for two channels driven. I am not sure how that translates into all channels driven. Should I enter in 5?
Note: This will be in an open concept living room loft space. The space is 19ft X 11ft X 12ft (LWH). To the right (off the width) the space opens to a kitchen and hallway.