S.M.S.L SP400 Power for all your headphones

S.M.S.L SP400 Power for all your headphones With 12W at 16Ω and 6W at 32Ω, the SP400 can power nearly everything. And if you need a little extra oomph, just toggle the three-position gain for an extra three to six decibels. Audio part: Input method: balanced x1, unbalanced x1 Output mode: balanced earphone X1, unbalanced earphone X1, pre-balanced output X1 Output Power: Balanced headphones: 12Wx 2 16Ω 6Wx2 32Ω 880mW x2 300Ω 440mW x2 600Ω Unbalanced headphones: 6Wx2 16Ω 3Wx2 32Ω 440mW x2 300Ω 220mW x2 600Ω Signal to noise ratio: 133dB, A-Weighted Residual noise: 1.9uV, A-Weighted THD+N: -123dB, 0.00007% 1kHz, 32Ω THD+N: -117dB, 0.00013% 20-20kHz, 32Ω, -3dB THD: -125dB, 0.00006% Input impedance: 47kΩ Output impedance: close to 0Ω Frequency response: 0.1Hz-500kHz -3dB