AIYIMA A70 Balanced Stereo Amplifier with PFFB 4 Ohm 300 watts TPA3255 2.0 CH Class D Amp for Home Theater Bookshelf Speaker XLR & RCA Inputs Trigger Input (with DC48V 5A Power Adapter)

Audiophile Components: The A70 is aiyima's first TPA3255 high-end Class D amplifier to feature PFFB filtered post-feedback technology, and uses high-quality Japanese Nichicon capacitors and high-power phase mode inductors. It has a signal-to-noise ratio of 106dB and distortion as low as 0.0015% (@ 1W).Load-independent linearity is achieved, significantly reducing distortion, enhancing linearity and frequency response, and improving sound purity and system efficiency. Richer Input Methods: This 2-channel amplifier has RCA inputs, balanced inputs and trigger inputs, and adds RCA gain switches to adjust the sound according to your needs. Its 12V trigger input connector can be synchronised with other devices, simplifying the switching process and eliminating the need for separate operation. Note: The 12V trigger must be connected to a preamplifier and must come with a 12V trigger output（not compatible with WiiM brand.） Advanced Thermal Technology: Based on the groundbreaking thermal design of the A70MAX, we have upgraded the A70's cooling system by adding dust caps to the vents on both sides for better ventilation, resulting in constant and stable high power output. Compatible with a wide range of op-amp chips: If you want to personalise your audio experience with the A70's op-amp rolling feature, you can try using a compatible eight-pin dual op-amp chip, such as: RT3609SM, OPA2604, OPA2134, LM4562, JRC5532, OP275GSZ, OPA1612, and more. Note: It is to replace the op-amp chip of the second board underneath. Versatile design: Vertical desktop configuration allows for flexible placement in any setup while taking up minimal space. And the large crystal terminals make it more stable and sound layered for big dynamic music. What you get: you get an A70 amplifier, a 48V5A gallium nitride power supply, and a manual. Note: You need a more powerful power supply to get the MAX 4 Ohm 300W x2 power output, such as 48V/10A