Pros: Dual headphone-out, selectable gain.
Cons: Gain is a little high. Roll-off in sub-bass.
It seems there is a sudden surge of volume-control-less, fixed boost type of ultra-portable amps being released to the market in the recent months, likely targeting the smartphone users market which has seen enormous growth globally in the last few years. NuForce is following the trend and comes out with a small amp called the Mobile Music Pump, or MMP for short. Spec Audio Input: 1 x 3.5 mm Headphone Output: 2 x 3.5 mm Gain: 3X or 5X, selectable by user THD+N: 0.09% @ 1 mW / 0.45% @ 32 mW S/N Ratio: over 100 dB, 20 – 20 kHz A-Weighted Frequency Response: 20 – 20 kHz +/- 1.5 dB Max Output: 94 mW @ 32 ohm, 1.74 V, 10% THD+N / 49.2 mW @ 100 ohm, 2.2 V, 10% THD+N Battery Life: over 8...(read more)