Is 45w rms enough to drive a 90w rms 84dB speaker properly, not blow my eardrums properly but loud with sq?
1W gives 84 dB if the speaker I suspect 84dB/wWhat formula do you use to calculate this?
Doubling power yields 3dB more output.What formula do you use to calculate this?
It could be a waste of 2 channels of amplification that are needed elsewhere. If there are 2 spare channels, sure, bridge away, but I'm guessing those channels are needed somewhere else. Using the above as an example, bridging the channels will only give 3dB more in ouput, which is not significant.Why not ?
Can you explain why the headroom is necessary?Headroom for the win.
Buy another amp.
Mostly because the music will never be at 45W. The RMS rating is 45W, but the transcients of the music mean that peaks will be 45W and the RMS less than 1/20th of the peak.Can you explain why the headroom is necessary?
In reality it moves the 87 dB to 90dB if one is staying under the clipping level.