active subwoofer power amplifier board, real material, excellent effect. The power amplifier part uses the TPA3255 digital power amplifier chip, and the power is as high as 600 watts/2 ohms, 300 watts/4 ohMs. Suitable for use on a regular home theater subwoofer, or a Group 2.1 system. The key to the effect of subwoofer is the design of the pre-filter circuit. This product has been optimized and debugged for many times, and the effect is quite excellent, low frequency diving is very deep, clean and neat, not bang the head, and feel full of strength. As long as it is matched with the right subwoofer speaker, the effect is quite comfortable. This product uses high-power switching power supply to that the output energy is continuous, not soft feet, coupled with high-power output inductance, first-class control force, retracting freely. The whole machine heat conduction this aluminum plate, the heat dissipation area is large, can the stability of long-term high-power operation. In addition, this power amplifier board is also equipped with a phase-inverted subwoofer and a closed subwoofer switch, so that each subwoofer can achieve good results. The material is solid, with an aluminum back panel, and almost no bottom noise. It is a rare subwoofer power amplifier board for home theaters. Model:Active subwoofer power amplifier board Enter:, XLR Output:XLR (low level) x 1, connector x 1(subwoofer) Working voltage:AC220V Standby power consumption:1W Power amplifier chip:τGu Alpha 3255 x 1 Output power:600Wx1/2ohm, 300Wx1/4ohm Total harmonic distortion:Less than 0.2% SNR:100dB Frequency response range:20Hz-200Hz2 Product size:27mm x 199mm x 42mm Colour: As Shown Material: aluminum Package Contents: 2 x Speaker amplifier board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.