10log(35) = 15.44 dB, so IIRC the A5s are ~ 96 dB/m once EQ'd flat, making peaks in ~111 dB range, but the Bs easily handle 100 W music power (and much more IME, but leave it to the gentle reader to find their own max comfortable power), so tack on another 4-5 dB and add +3 dB for stereo, putting it within 'spittin' distance of THX cinema reference.
Anyway, just based on this review, most definitely want to bi-amp due to its incredibly high DF that implies truly excessive -fb and the consequent rolled off HF that severely limits its mids/HF transient response, i.e ideally want it flat into the hundreds of thousands of Hz IIRC, but can't remember the R-O-T :(.
Adcom GFA-565 monoblock power amplifier Measurements | Stereophile.com
In a quick search didn't find what class it is, but for hi-eff/res speaker systems we ideally want Class A or at least 10 W in Class A of a Class A/B amp with < ~ DF = 80. Also, if the amp is too powerful for the system's average power required, then it's not in the amp's power 'sweet spot', so may not be as linear as the measurements imply and factor in it doesn't list any Class A it may not be all that 'clean' based on my understanding, just super dry/sterile sounding that at least one time defined esoteric 'ne plus ultra' among the audio 'cognoscenti'.
Just musing.........tempting to try parallel 8 ohm power resistors across the drivers and run them @ 4 ohms as a poor man's matching impedance system.
