Compact 2.1 channel amplifier with HDMI ARC, USB, optical and Bluetooth 5.0 inputs, built on two Infineon MA12070P chips. 70W per channel into 4 ohms plus a 100W passive subwoofer channel, with adjustable high pass and low pass crossover points. Brand new, boxed, full manufacturer warranty. The SMSL A50 Pro is a small 2.1 channel amplifier designed for a television or desk system where a pair of speakers and a passive subwoofer need driving from one box. At 134mm wide it takes almost no space. This is brand new stock, supplied boxed with the full manufacturer warranty by Dreamcrest Audio as an authorised SMSL dealer. What it does The A50 Pro combines a digital input stage and a Class D amplifier on two Infineon MA12070P chips. HDMI ARC lets it take sound directly from a television and respond to the television remote, while USB, optical and Bluetooth 5.0 cover computers, streamers and phones. It drives a stereo pair at 70W per channel into 4 ohms and a passive subwoofer at 100W into 2 ohms, with the subwoofer level set independently. Adjustable high pass and low pass crossover points let you decide where the main speakers hand over to the subwoofer, which matters far more to the final result than raw power does. How it sounds and where it fits Efficiency is quoted at up to 92%, so the chassis stays cool and can be left on. The presentation is clean and controlled rather than rich, which suits small standmount or bookshelf speakers that need a firm hand. Its natural home is under a television with a pair of compact speakers and a passive subwoofer, or on a desk in a room too small for floorstanders. Set the low pass filter to the point where the subwoofer takes over from the main speakers and trim the subwoofer level by ear. SMSL note that the AUX input has a higher noise floor by design, so use the digital inputs where you can. Key features Two Infineon MA12070P Class D amplifier chips, efficiency up to 92% 70W per channel into 4 ohms for the stereo pair 100W into 2 ohms for a passive subwoofer, with independent subwoofer level HDMI ARC for direct television connection USB, optical and Bluetooth 5.0 inputs, plus a 3.5mm AUX input Adjustable high pass and low pass crossover points Bass and treble adjustment with preset equalisation curves Electronic volume control and pop suppression circuit Technical specifications Amplifier chips: 2 x Infineon MA12070P Output power: 70W x 2 at 4 ohms, plus 100W at 2 ohms for the subwoofer channel THD+N: 0.013% Signal to noise ratio: 102dB Frequency response: 20Hz to 20kHz Inputs: USB-C, HDMI ARC, optical, 3.5mm AUX, Bluetooth 5.0 High pass filter: adjustable 200Hz to 600Hz. Low pass filter: adjustable 50Hz to 120Hz Power supply: DC 12V to 24V Dimensions: 134 x 33 x 103 mm. Weight: 0.3kg Frequently asked questions Can I connect it to my television? Yes. HDMI ARC takes sound directly from the television, and the optical input is available as an alternative. Does the subwoofer output need a powered subwoofer? No. The subwoofer channel is amplified at 100W into 2 ohms, so it drives a passive subwoofer directly. Which input sounds best? Use HDMI ARC, USB, optical or Bluetooth. SMSL state that the AUX input has a higher noise floor because of its circuit design. If you want help choosing speakers and a subwoofer to go with the A50 Pro, use the enquiry button on this page.
Dreamcrest Audio Fidelity Ltd, Nicosia. Specialist hi-fi and high end audio, 20+ years in the audio business. Full details and photos: https://www.dreamcrestaudio.com/product/smsl-a50-pro-2-1-channel-amplifier-with-hdmi-arc-black-brand-new/
