This upgraded AIYIMA A07 Premium Compact Hifi Stereo Amplifier features the Texas Instruments TPA3255 high-performance, low-distortion, high-power Class D stereo amplifier chip and the NE5532 dual op-amp chip for the lowest possible noise, distortion, and clipping, with a stable output that's easy to set up. Excellent sound is ideal for bookshelf and tabletop home theatre setups. Small but powerful:The A07 is a simple but powerful 300-watt x 2 mini integrated Class D amplifier. It has a maximum output power of 80 watts at 4 ohms from a 32V5A power supply in its original configuration. Designed for users seeking HIFI sound, it is highly efficient, with a maximum power output of up to 300 watts at 10% THD (note: you will need a more powerful power supply to get the maximum 300W x2 power output, e.g. 48V/10A). High-performance components: AIYIMA A07 2-channel amplifier upgraded version Compact and exquisite shape, with Japan ELNA capacitors, 63V filter capacitors, WIMA capacitors and other well-known components, audiophile-grade components, so that it has a high signal-to-noise ratio (SNR) of up to 103dB, the total harmonic distortion (THD) is as low as 0.005%, with excellent performance, excellent sound quality. Outputs & Inputs:This stereo small amplifier features 3.5mm AUX pre-out and RCA audio input: 3.5mm port for full-range output, ‘pre-out’ level is controlled by volume, can be connected to any active equipment, such as: passive speakers and amplifiers paired with active subwoofer amplifiers. Sound formulation: AIYIMA A07 mini power amplifier with NE5532 dual op-amp chip, can be upgraded and replaced, such as upgrading to the OPA series, LM series, MUSES series, etc., can meet the needs of more audiophile sound. Replaceable op-amp chips: OPA2604, OPA2134, LM4562, JRC5532, etc.