02-Oct-2016, 12:23
When your room setup allows it you should play a bit with the speaker placement. It can be that with two Phantoms you excite different room modes and that now your listing position is in valley and before was in a peak. This is the only way I think you can get what you hear. In ideal conditions with 2 Phantoms you should get a slightly higher sound pressure level of max. 108 dB compared to 105 dB @ 1m with a single silver. But room modes can have a much higher influence on perceived loudness at specific room positions, specifically at the low end.
