Stereophile: 86.5dB/2.83V/1m - The BMR Monitor is a very demanding load for the partnering amplifier.
Its current-hungry impedance will require careful amplifier matching.
OP - First Watt J2 amp, with 25 wpc of Class A power
You don’t have enough power to run the BMRs. It’s not just softer, but you need current to control the lower bass unit in both starting and stopping/braking upon the return.

