{"product_id":"smsl-pa40-digital-power-amplifier","title":"SMSL PA40 Infineon MA5332 Digital Power Amplifier","description":"\u003cp\u003e\u003cstrong\u003eInfineon MA5332 Class D Amplifier with 165W x 2 Output\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe SMSL PA40 is a high-efficiency digital power amplifier built around the Infineon MA5332 Class D amplifier chip, delivering 165 watts per channel into 4 ohms and 85 watts per channel into 8 ohms. With THD+N of just 0.004%, a signal-to-noise ratio of 100 dB, selectable high and low gain inputs, NJU7391A electronic volume control with surround sound and tone control, gold-plated RCA inputs and speaker terminals, and a built-in power supply that eliminates external adapters, the PA40 combines audiophile-grade measured performance with the convenience and efficiency of modern Class D amplification.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eInfineon MA5332 Class D Amplifier Chip\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe MA5332 from Infineon is a high-performance digital amplifier chip designed for audio applications demanding superior efficiency and low energy consumption. With THD+N of 0.004% and a 100 dB signal-to-noise ratio, the PA40 delivers clean, dynamic, and low-distortion sound with excellent low-frequency response and minimal noise floor.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e165W x 2 into 4 Ohms\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOutput power is rated at 165 watts per channel into 4-ohm loads and 85 watts per channel into 8-ohm loads — sufficient to drive bookshelf and floorstanding speakers with authority and headroom. Selectable high gain (315mV\/20kOhm) and low gain (580mV\/20kOhm) inputs accommodate a wide range of source output levels.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eNJU7391A Volume Control with Tone Adjustment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe NJU7391A electronic volume control chip provides surround sound processing, bass and treble tone adjustment, and precise volume control. Fine-tune the sound to match your room acoustics, speaker characteristics, and personal preference — all from the front-panel knob or included remote control.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eBuilt-In Power Supply\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAn integrated power supply eliminates the need for bulky external adapters, reducing cable clutter and electromagnetic interference while providing stable, optimized power delivery. Power consumption is just 40 watts at normal listening volume.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eGold-Plated Terminals and Compact Chassis\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eHigh-quality gold-plated RCA inputs and speaker outputs ensure durable, reliable, and corrosion-resistant connectivity. The compact chassis measures just 191.6 x 41.6 x 185 mm and weighs only 1.26 kg, fitting comfortably into any desktop or shelf-based audio system.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmplifier Chip:\u003c\/strong\u003e Infineon MA5332 Class D\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Power:\u003c\/strong\u003e 165W x 2 @ 4 Ohm \/ 85W x 2 @ 8 Ohm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTHD+N:\u003c\/strong\u003e 0.004%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSNR:\u003c\/strong\u003e 100 dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChannel Separation:\u003c\/strong\u003e 72 dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Sensitivity:\u003c\/strong\u003e High Gain 315mV\/20kOhm \/ Low Gain 580mV\/20kOhm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput:\u003c\/strong\u003e RCA (Gold-Plated)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVolume Control:\u003c\/strong\u003e NJU7391A with Tone and Surround Processing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e Built-In\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Consumption:\u003c\/strong\u003e 40 W (Normal Volume)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 191.6 x 41.6 x 185 mm (W x H x D)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.26 kg (2.77 lbs)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSMSL PA40 Digital Power Amplifier\u003c\/li\u003e\n\u003cli\u003eRemote Control\u003c\/li\u003e\n\u003cli\u003ePower Cable\u003c\/li\u003e\n\u003cli\u003eUser Manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\n\n\n\n\n\n\n\n\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-infinion-ma5332-class-d-amplifier-overview.jpg\" alt=\"Smsl Pa40 Infinion Ma5332 Class D Amplifier Overview\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-ma5332-high-efficiency-chip-architecture.jpg\" alt=\"Smsl Pa40 Ma5332 High Efficiency Chip Architecture\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-165w-per-channel-output-power.jpg\" alt=\"Smsl Pa40 165W Per Channel Output Power\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-0-004-thd-n-100db-snr-measurements.jpg\" alt=\"Smsl Pa40 0 004 Thd N 100Db Snr Measurements\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-nju7391a-bass-treble-tone-control.jpg\" alt=\"Smsl Pa40 Nju7391A Bass Treble Tone Control\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-high-low-gain-input-sensitivity.jpg\" alt=\"Smsl Pa40 High Low Gain Input Sensitivity\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-integrated-power-supply-no-external-brick.jpg\" alt=\"Smsl Pa40 Integrated Power Supply No External Brick\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-gold-plated-rca-input-speaker-output.jpg\" alt=\"Smsl Pa40 Gold Plated Rca Input Speaker Output\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-compact-191x41x185mm-aluminum-chassis.jpg\" alt=\"Smsl Pa40 Compact 191X41X185Mm Aluminum Chassis\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-full-function-infrared-remote-control.jpg\" alt=\"Smsl Pa40 Full Function Infrared Remote Control\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-channel-separation-and-crosstalk.jpg\" alt=\"Smsl Pa40 Channel Separation And Crosstalk\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-frequency-response-and-bandwidth.jpg\" alt=\"Smsl Pa40 Frequency Response And Bandwidth\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-power-consumption-and-efficiency.jpg\" alt=\"Smsl Pa40 Power Consumption And Efficiency\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-protection-circuitry-overheat-overcurrent.jpg\" alt=\"Smsl Pa40 Protection Circuitry Overheat Overcurrent\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-desktop-bookshelf-speaker-setup.jpg\" alt=\"Smsl Pa40 Desktop Bookshelf Speaker Setup\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-rear-panel-connectivity-layout.jpg\" alt=\"Smsl Pa40 Rear Panel Connectivity Layout\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-front-panel-knob-and-display.jpg\" alt=\"Smsl Pa40 Front Panel Knob And Display\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-specifications-chart-part1.jpg\" alt=\"Smsl Pa40 Specifications Chart Part1\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-specifications-chart-part2.jpg\" alt=\"Smsl Pa40 Specifications Chart Part2\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-performance-measurement-graphs.jpg\" alt=\"Smsl Pa40 Performance Measurement Graphs\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-dimensions-and-weight-diagram.jpg\" alt=\"Smsl Pa40 Dimensions And Weight Diagram\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-system-integration-examples.jpg\" alt=\"Smsl Pa40 System Integration Examples\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-package-contents-and-box.jpg\" alt=\"Smsl Pa40 Package Contents And Box\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-accessories-and-cables.jpg\" alt=\"Smsl Pa40 Accessories And Cables\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-installation-and-setup-guide.jpg\" alt=\"Smsl Pa40 Installation And Setup Guide\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-technical-documentation.jpg\" alt=\"Smsl Pa40 Technical Documentation\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-warranty-and-support-information.jpg\" alt=\"Smsl Pa40 Warranty And Support Information\"\u003e\u003c\/p\u003e","brand":"SMSL","offers":[{"title":"Default Title","offer_id":48764925870272,"sku":"10014123","price":1239.6,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/smsl-pa40-amplifier-front-view.webp?v=1786344952","url":"https:\/\/hifichic.com\/products\/smsl-pa40-digital-power-amplifier","provider":"HIFICHIC","version":"1.0","type":"link"}