Models range from the S 5000 High Power, S 4000 Pro Power, S 2500 Quantum, and S 1000. The larger the StromTank, the more power it can output for extended periods. When batteries are near depletion, the unit automatically switches to wall current and recharges without interrupting playback. The average autonomous operating time is 8 hours, depending upon the StromTank model and the total energy consumption of connected components.

From Edward: A few years back, while visiting Dan D’Agostino, he sent us packing with our first unit, the S1000, and we haven’t looked back since; now, fast forward to Axpona and Pacific Audiofest. In front of a packed room, the cycle mode button was depressed, and StromTank showed how the noise floor collapses when switching between on-grid and battery direct, which makes the case, like many things in Audio, you don’t know until you know.