---
product_id: 434069742
title: "S.M.S.L SH-9 Headphone Amplifier THX AAA Technology RCA/XLR Input 6.35MM Balanced Headphone Amplifier"
brand: "s.m.s.l"
price: "S$563"
currency: SGD
in_stock: true
reviews_count: 5
category: "S.M.S.L"
url: https://www.desertcart.sg/products/434069742-s-m-s-l-sh-9-headphone-amplifier-thx-aaa
store_origin: SG
region: Singapore
---

# 6W power @16Ω Balanced stereo output Ultra-low noise THD 0.00006% S.M.S.L SH-9 Headphone Amplifier THX AAA Technology RCA/XLR Input 6.35MM Balanced Headphone Amplifier

**Brand:** s.m.s.l
**Price:** S$563
**Availability:** ✅ In Stock

## Summary

> 🎧 Elevate your audio game with THX AAA precision power!

## Quick Answers

- **What is this?** S.M.S.L SH-9 Headphone Amplifier THX AAA Technology RCA/XLR Input 6.35MM Balanced Headphone Amplifier by s.m.s.l
- **How much does it cost?** S$563 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/434069742-s-m-s-l-sh-9-headphone-amplifier-thx-aaa)

## 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

- • **Silent Control:** 256-level relay volume control with pop-less switching for smooth listening transitions.
- • **Balanced Brilliance:** Dual balanced inputs and outputs ensure pristine stereo separation and clarity.
- • **Powerhouse Precision:** 6 watts into 16Ω delivers clean, distortion-free volume for any headphone.
- • **Rock-Solid Protection:** Comprehensive safeguards against DC, over-voltage, over-current, short-circuit, and thermal risks.
- • **Compact Command Center:** Sleek 1.9-inch LCD and ultra-compact design fit perfectly on any professional desktop setup.

## Overview

The S.M.S.L SH-9 is a high-performance headphone amplifier featuring THX AAA-888 technology, delivering up to 6 watts into 16Ω headphones with ultra-low distortion (THD+N 0.00006%). It supports balanced stereo inputs and outputs, offers advanced protection circuits, and includes a high-precision, pop-less relay volume control with 256 levels. Its compact design and clear LCD display make it an ideal choice for audiophiles and professionals seeking flawless sound clarity and power.

## Description

Note: Please press B key firstly when you using remote control, thanks Features SNR>137dB THD<0.00006% Ultra-Compact Design, Perfect for Desktop Systems High Precision Resistors for Temperature Stability Pop-less Design with High-Quality Relays High precision and low noise 256 level relay volume control; In actual use, in order to make the volume more linear, the extra levels are shielded. 2 Positions Switchable Gain Control High-Eficiency Ultra-Low-Noise Power Supply 1.9 inch LCD display. Specifications Audio Section: Inputs:Balanced x1, Unbalanced x1 Outputs:Balanced x1, Unbalanced x1 Output Power:6W x 2(16Ω) 3W x 2(32Ω) 440mW x 2 (300Ω) 220mW x 2 (600Ω) SNR:137dB, A-Weighted Output Noise:1.9uV, A-Weighted THD+N:-123dB, 0.00006% (A-Weighted) THD+N:-117dB, 0.00013% (20-20kHz, 32Ω,-3dB) THD:-125dB, 0.00006%(1kHz, 16Ω, -3dB) Input Impedance:47kΩ Output Impedance:Near 0Ω Frequency Response:0.1Hz-500kHz(-3dB) Gain:Low(+0dB), High(+10dB) General Section: Power supply voltage/frequency: AC100-240V, 50-60 Hz Power consumption(EN60065):24W Power consumption in standby mode:<0.1W Size:187.5x154x40(mm) Packing size: 282x232x79(mm) Weight:790g

Review: Habe meinen RME ADI-2 mit dem KHV ergänzt und mir gefällt nun die Darstellung der Musik besser. Von den Werten ist der Ausgang vom RME überlegen aber die Insturumente sind eingebundener und der KHV klingt musikalischer. Ob er ohne Equalizing sich auch gut anhört und nicht etwa zu spitz ist, kann ich nicht sagen. Wenn man meckern möchte könnte man ihm eine enge Bühne vorwerfen was mit einer guten Präsenz der Sänger belohnt wird. Der bleibt da! Die Fernbediehnung ist natürlich super bequem. Er klickt hörbar im Gerät bei veränderung der Lautstärke aber das stört nicht - im Gegenteil: Ich mag das irgendwie.
Review: Excellent sonic qualities with massive power to drive any of my headphones, IEMs etc. including power hungry Sennheiser's . The only minor downside is that it gets a little warm under heavy loads but not hot.

## Features

- THXAAA-888 Headphone Amplfier with THX AAA Technology
- 6 Watts into 16 Ohm,3 Watts into 32 Ohm Headphones with lowest THD+N
- 0.1Hz to 500kHz(-3dB) Frequency Response
- Fully Protection with DC, Over-Voltage, Over-Current, Short-Circuit and Thermal Protection on Headphone Amplifier
- Balanced Stereo Headphone Output; Balanced Stereo Line Input

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08MVTM7K3 |
| Country of origin | China |
| Item model number | SH-9 |
| Manufacturer | S.M.S.L |
| Package Dimensions | 28.45 x 23.11 x 7.87 cm; 1.26 kg |

## Product Details

- **Manufacturer:** S.M.S.L
- **Maximum supply voltage:** 240 Volts
- **Minimum supply voltage:** 100 Volts
- **Mounting type:** Tabletop
- **Voltage:** 240 Volts

## Images

![S.M.S.L SH-9 Headphone Amplifier THX AAA Technology RCA/XLR Input 6.35MM Balanced Headphone Amplifier - Image 1](https://m.media-amazon.com/images/I/51tZNieez0L.jpg)
![S.M.S.L SH-9 Headphone Amplifier THX AAA Technology RCA/XLR Input 6.35MM Balanced Headphone Amplifier - Image 2](https://m.media-amazon.com/images/I/51rOdYKdjmL.jpg)
![S.M.S.L SH-9 Headphone Amplifier THX AAA Technology RCA/XLR Input 6.35MM Balanced Headphone Amplifier - Image 3](https://m.media-amazon.com/images/I/51HsEmogAeL.jpg)
![S.M.S.L SH-9 Headphone Amplifier THX AAA Technology RCA/XLR Input 6.35MM Balanced Headphone Amplifier - Image 4](https://m.media-amazon.com/images/I/51WKieDMHyL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by M***N on 17 May 2021*

Habe meinen RME ADI-2 mit dem KHV ergänzt und mir gefällt nun die Darstellung der Musik besser. Von den Werten ist der Ausgang vom RME überlegen aber die Insturumente sind eingebundener und der KHV klingt musikalischer. Ob er ohne Equalizing sich auch gut anhört und nicht etwa zu spitz ist, kann ich nicht sagen. Wenn man meckern möchte könnte man ihm eine enge Bühne vorwerfen was mit einer guten Präsenz der Sänger belohnt wird. Der bleibt da! Die Fernbediehnung ist natürlich super bequem. Er klickt hörbar im Gerät bei veränderung der Lautstärke aber das stört nicht - im Gegenteil: Ich mag das irgendwie.

### ⭐⭐⭐⭐⭐ Review
*by B***R on 23 June 2025*

Excellent sonic qualities with massive power to drive any of my headphones, IEMs etc. including power hungry Sennheiser's . The only minor downside is that it gets a little warm under heavy loads but not hot.

### ⭐⭐⭐⭐⭐ Review
*by C***N on 9 February 2023*

Ottimo prodotto! Quando i Cinesi fanno lo cose davvero bene... Associato al suo dac SU-9 ha un suono meraviglioso. Preciso, gradevole, non stancante, immagine perfetta. Nulla da eccepire. Compratelo a scatola chiusa.

## Frequently Bought Together

- S.M.S.L SH-9 Headphone Amplifier THX AAA Technology RCA/XLR Input 6.35MM Balanced Headphone Amplifier
- Cable Matters 2-Pack Premium Short XLR to XLR Cables - 3ft, Male to Female Microphone Cable, Oxygen-Free Copper (OFC) Mic Cord, Black
- S.M.S.L SU-9n ES9038PRO XMOS XU208 Bluetooth 5.0 SMSL DSD512 RCA/XLR LDAC APTX/HD Decoder High Resolution Audio DAC

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-02-22*