---
product_id: 638606333
title: "A50 PRO HiFi Power Amplifier, High/Low Pass F, 2.1-Channel, Infineon's MA12070P Chip, Bluetooth 5.0/USB/Optical/HDMI/AUX input Passive subwoofer with adjustable volume, with Remote Control"
brand: "s.m.s.l"
price: "C$17513"
currency: NIO
in_stock: true
reviews_count: 13
category: "S.M.S.L"
url: https://www.desertcart.ni/products/638606333-a50-pro-hifi-power-amplifier-high-low-pass-f-2
store_origin: NI
region: Nicaragua
---

# 100W passive subwoofer power Multi-input: Bluetooth 5.0, USB-C, HDMI ARC, Optical, AUX 10-point adjustable high/low pass filters A50 PRO HiFi Power Amplifier, High/Low Pass F, 2.1-Channel, Infineon's MA12070P Chip, Bluetooth 5.0/USB/Optical/HDMI/AUX input Passive subwoofer with adjustable volume, with Remote Control

**Brand:** s.m.s.l
**Price:** C$17513
**Availability:** ✅ In Stock

## Summary

> 🎧 Elevate your audio game with precision and power — don’t just listen, experience it!

## Quick Answers

- **What is this?** A50 PRO HiFi Power Amplifier, High/Low Pass F, 2.1-Channel, Infineon's MA12070P Chip, Bluetooth 5.0/USB/Optical/HDMI/AUX input Passive subwoofer with adjustable volume, with Remote Control by s.m.s.l
- **How much does it cost?** C$17513 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/638606333-a50-pro-hifi-power-amplifier-high-low-pass-f-2)

## Best For

- s.m.s.l enthusiasts

## Why This Product

- Trusted s.m.s.l brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Custom EQ Presets:** Adapt your sound with multiple EQ modes plus ±9 level bass and treble adjustments for every music style.
- • **Compact Powerhouse:** Sleek, lightweight design packs Infineon’s MA12070P chip delivering high-fidelity sound without clutter.
- • **Precision Bass Control:** Fine-tune your subwoofer volume independently for a perfectly balanced 2.1 soundstage.
- • **Versatile Connectivity:** Seamlessly connect all your devices with Bluetooth 5.0, USB-C plug-and-play, HDMI ARC, optical, and AUX inputs.
- • **Intuitive Digital Interface:** Effortlessly tweak settings via a single rotary encoder and clear 3-digit display—remote control included.

## Overview

The S.M.S.L A50 PRO is a compact 2.1-channel HiFi power amplifier featuring Infineon's MA12070P chip, delivering 100W passive subwoofer output with adjustable volume. It offers 10-point high/low pass filters, multiple EQ presets, and versatile connectivity including Bluetooth 5.0, USB-C, HDMI ARC, optical, and AUX inputs. Designed for audiophiles seeking customizable, high-fidelity sound with intuitive digital controls and remote operation, it’s a modern amplifier perfect for building a balanced 2.1 speaker system.

## Description

S.M.S.L A50 PRO HiFi Power Amplifier, High/Low Pass F, 2.1-Channel, Infineon's MA12070P Chip, Bluetooth 5.0/USB/Optical/HDMI/AUX input Passive subwoofer with adjustable volume, with Remote Control : desertcart.co.uk: Electronics & Photo

Review: A rare quality 2.1 amp with a passive sub output - I needed this. - Very well constructed for the price and compact as well, I was using a digital amp with analogue controls, this amp is digital all the way with the very intuitive single rotary encoder knob and the three digit display. Once you get to know the different display menu modes, tweaking with just the front knob is a breeze. The various eq modes, bass, treble, tone presents, high and low pass filters and subwoofer volume are quite subtle to my recollection but it's well worth spending a bit of time tweaking them to your tastes as the amp has virtually no problems filling my listening room with a very balanced 3d stereo image soundstage whether using the excellent bluetooth receiver or the optical in. I have very little use for the usb dac in, 3.5mm jack in and the HDMI ARC, I have a 200 cd changer, media streamer and a linear tracking turntable connected to an Arylic BP50 preamp feeding the S.M.S.L. via an optical cable . Then out of the stereo L & R and subwoofer outputs to a pair of Wharfedale Modus Cubes and a matching pair of Mission 73ps passive subwoofers. The remote control is a nice addition and it seems to work well but my room is so small I can just reach over to the amp and use the rotary controller. I bought this amp because it had a passive sub output and an optical in - these and everything else works flawlessly - a great little modern amp for a bargain price.
Review: Great soundbar alternative for 2.1 setup with passive subwoofer - Perfect alternative to a soundbar for 2.1 setup. It's easy to convert a subwith a broken amp into a passive sub, but it's not easy to find a 2.1 amplifier with a remote control. This meets that perfectly. It links up easy with my TV over hdmi. It looks sleek. It is powerful enough for normal volume levels. Yeah the settings are a bit weird but you only need to figure those out once. It lets my partner use the 2.1 setup without having to fiddle about with settings. Bluetooth connection works well. It's not there to provide chest shaking bass but hey thats not what I bought it for! Make sure to set the audio format to PCM on your TV to get proper 2 channel audio output sent to the amp, and make sure to plug into the ARC (or eARC) labelled hdmi port on your TV. Works a charm!

## Features

- Getting ten crossover frequency points adjustable for High-pass and low-pass each. Subwoofer's volume can set it separetely,which perfectly can use well for different main speaker and passive subwoofer and build your real 2.1 speaker system.
- Passive subwoofer with adjustable volume and high power: The A50 Pro provides 100 watts of passive bass output power. lt effortlessly handles various speakers and scenarios, allowing you to adjust the subwoofer volume from S00 to S99 as desired.
- Multiple EQ presets：This digital amplifier features multiple EQ presets, allowing it to adapt to various music styles and provide a diverse listening experience. Additionally, it has bass and treble adjustments, with a customizable range of ±9 levels.
- Higher versatility Supports multiple devices：USB-Cport supports driver-free use.HDMl (ARC) is compatible with most televisions and also equipped with optical input and AUXinput. it's suitable for almost all audio connections.
- 12-month warranty, you can return the item or replace a new one if you have any problems.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D1G7R489 |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 23,911 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 26 in AV Receivers & Amplifiers |
| Customer Reviews | 4.1 4.1 out of 5 stars (247) |
| Date First Available | 16 April 2024 |
| Included components | remote control |
| Item Weight | 1.1 kg |
| Item model number | A50 PRO |
| Manufacturer | S.M.S.L |
| Package Dimensions | 32.21 x 19.81 x 7.29 cm; 1.1 kg |
| Part number | A50 |
| Plug profile | freestanding |
| Specification met | Hifi |
| Voltage | 24 Volts |

## Product Details

- **Brand:** S.M.S.L
- **Manufacturer:** S.M.S.L
- **Mounting type:** freestanding
- **Number of channels:** 2
- **Voltage:** 24 Volts

## Images

![A50 PRO HiFi Power Amplifier, High/Low Pass F, 2.1-Channel, Infineon's MA12070P Chip, Bluetooth 5.0/USB/Optical/HDMI/AUX input Passive subwoofer with adjustable volume, with Remote Control - Image 1](https://m.media-amazon.com/images/I/61r5x4MRIUL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ A rare quality 2.1 amp with a passive sub output - I needed this.
*by K***J on 3 December 2025*

Very well constructed for the price and compact as well, I was using a digital amp with analogue controls, this amp is digital all the way with the very intuitive single rotary encoder knob and the three digit display. Once you get to know the different display menu modes, tweaking with just the front knob is a breeze. The various eq modes, bass, treble, tone presents, high and low pass filters and subwoofer volume are quite subtle to my recollection but it's well worth spending a bit of time tweaking them to your tastes as the amp has virtually no problems filling my listening room with a very balanced 3d stereo image soundstage whether using the excellent bluetooth receiver or the optical in. I have very little use for the usb dac in, 3.5mm jack in and the HDMI ARC, I have a 200 cd changer, media streamer and a linear tracking turntable connected to an Arylic BP50 preamp feeding the S.M.S.L. via an optical cable . Then out of the stereo L & R and subwoofer outputs to a pair of Wharfedale Modus Cubes and a matching pair of Mission 73ps passive subwoofers. The remote control is a nice addition and it seems to work well but my room is so small I can just reach over to the amp and use the rotary controller. I bought this amp because it had a passive sub output and an optical in - these and everything else works flawlessly - a great little modern amp for a bargain price.

### ⭐⭐⭐⭐⭐ Great soundbar alternative for 2.1 setup with passive subwoofer
*by A***Z on 4 May 2025*

Perfect alternative to a soundbar for 2.1 setup. It's easy to convert a subwith a broken amp into a passive sub, but it's not easy to find a 2.1 amplifier with a remote control. This meets that perfectly. It links up easy with my TV over hdmi. It looks sleek. It is powerful enough for normal volume levels. Yeah the settings are a bit weird but you only need to figure those out once. It lets my partner use the 2.1 setup without having to fiddle about with settings. Bluetooth connection works well. It's not there to provide chest shaking bass but hey thats not what I bought it for! Make sure to set the audio format to PCM on your TV to get proper 2 channel audio output sent to the amp, and make sure to plug into the ARC (or eARC) labelled hdmi port on your TV. Works a charm!

### ⭐⭐⭐⭐ Causes interference on the UK amateur radio HF frequencies.
*by S***Y on 14 January 2026*

I bought this for a present for my husband so this is his review. For it's price this DAC amplifier is very good. I replaced a massive Onkyo TN414 AV amplifier with this teeny device. The sound quality is very good and plenty loud enough. The remote control is a bit slow. The number of inputs is excellent for the price. I do however have one issue that would not affect most users. I am an amateur radio operator (HAM) and this DAC produces severe RF interference across most of the bands from the speaker cables. It should adhere to UK interference compliance but quite obviously doesn't. I have emailed S.M.S.L but have not yet received a reply.

## Frequently Bought Together

- S.M.S.L A50 PRO HiFi Power Amplifier, High/Low pass filter 2.1-Channel, Infineon's MA12070P Chip, Bluetooth 5.0/USB/Optical/HDMI/AUX input Passive subwoofer with adjustable volume, with Remote Control
- FosPower Banana Plugs 2 Pairs / 4 pcs, Closed Screw 24K Gold Plated Banana Speaker Plug Connectors for Speaker Wire, Wall Plate, Home Theater, Audio/Video Receiver, Amplifiers and Sound Systems
- Amazon Basics Speaker Cable, Easy Assembly, 16-Gauge, Bronze, 100 ft

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*Product available on Desertcart Nicaragua*
*Store origin: NI*
*Last updated: 2026-01-26*