MIDIMAN M-Audio Studiophile SP-5B Bi-Amplified Near Field Studio Monitors ( Pair ) HF speaker 2.5 cm (1"), swivel-mounted silk dome incorporating magnetic shielding, ferro-fluid and internal damping technology LF Speaker - 12 cm (5"), 5-inch driver with magnetically shielded mineral-filled polypropylene cone, high-temperature tolerant voice coil and damped rubber surround Power of HF amplifier	33 W Power of LF amplifier	42 W SNR	&gt; 100 dB below full output, 20kHz bandwidth