PM-SUBmini 2 vs Wharfedale PowerCube SPC-8
The PowerCube SPC-8's impedance is 8Ω against the PM-SUBmini 2's 4Ω, its signal-to-noise 85 dB against 80 dB, and its high-frequency extension 120 Hz against 150 Hz. Both share low-frequency extension (40 Hz).