---
product_id: 258607329
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: "$4821194"
currency: COP
in_stock: true
reviews_count: 13
url: https://www.desertcart.co/products/258607329-s-m-s-l-sh-9-headphone-amplifier-thx-aaa
store_origin: CO
region: Colombia
---

# 6W power @16Ω Balanced XLR & RCA inputs THD+N <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:** $4821194
**Availability:** ✅ In Stock

## Summary

> 🎧 Elevate your audio game with flawless power and precision.

## 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?** $4821194 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co](https://www.desertcart.co/products/258607329-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

- • **Smart & Sleek Design:** Compact desktop footprint with a sharp 1.9-inch LCD and remote control for effortless, precise volume adjustments.
- • **Seamless Connectivity:** Balanced XLR and RCA inputs plus balanced headphone outputs for professional-grade signal integrity.
- • **Rock-Solid Reliability:** Comprehensive protection circuitry guards against DC, over-voltage, over-current, short-circuit, and thermal risks.
- • **Audiophile-Grade Clarity:** Ultra-low distortion (THD+N 0.00006%) ensures pristine, crystal-clear sound with zero coloration.
- • **Pure Powerhouse Performance:** Delivers 6 watts into 16Ω for driving any headphones, from IEMs to power-hungry audiophile beasts.

## Overview

The S.M.S.L SH-9 is a premium THX AAA-888 headphone amplifier delivering up to 6 watts into 16Ω headphones with ultra-low distortion and noise. Featuring balanced XLR and RCA inputs, a high-precision relay volume control, and a compact design with LCD display and remote, it offers audiophile-grade sound clarity and robust protection for professional and discerning listeners alike.

## 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: Excellent headphone amp. - 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: Buy this headphone amp! - Compared to other headphone amps in the same category with AAA tech, XLR inputs, XLR headphone output, and 3 or so watts of output, the SMSL SH-9 is an excellent build, especially with the remote (!!!) and LCD screen. The only thing this is missing is outputs to be used as a preamp, but I did not buy it for preamp use - I wanted the headphone amplification and only that, with high performance. This unit is a top notch performer with clean sound, super channel separation, and plenty of power. I drive a few different headphones with this, but I usually use an Audeze LCD-2 (with Phazor) and this amp is an excellent match. The sound signature is totally neutral and complete at all frequencies, which the LCD-2 needs with it's laid back nature. No extra color needed in the signal - just the pure clean source as desired. My only nitpick is that the volume knob is clicky, but the tech behind the volume adjustments is definitely worth the tradeoff - super accurate and 100% balanced from right to left channels. Highly recommended.

## 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 |
| Best Sellers Rank | #371,670 in Electronics ( See Top 100 in Electronics ) #2,182 in Audio Component Amplifiers |
| Brand | S.M.S.L |
| Date First Available | November 6, 2020 |
| Item Weight | 2.77 pounds |
| Item model number | SH-9 |
| Manufacturer | S.M.S.L |
| Maximum Supply Voltage | 2.4E+2 Volts |
| Minimum Supply Voltage | 1E+2 Volts |
| Mounting Type | Tabletop |
| Number of Channels | 2 |
| Output Power | 6 Watts |
| Package Dimensions | 11.2 x 9.1 x 3.1 inches |
| Package Type Name | box |
| Specification Met | En60065, Frequency Response, Thd |
| Voltage | 240 Volts |

## Product Details

- **Manufacturer:** S.M.S.L
- **Maximum Supply Voltage:** 2.4E+2 Volts
- **Minimum Supply Voltage:** 1E+2 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/313QnzUehNL.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/317Y38WPygL.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/31o7wjN4G7L.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/41w0hOdCHAL.jpg)
![S.M.S.L SH-9 Headphone Amplifier THX AAA Technology RCA/XLR Input 6.35MM Balanced Headphone Amplifier - Image 5](https://m.media-amazon.com/images/I/51HsEmogAeL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent headphone amp.
*by B***R on June 23, 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.

### ⭐⭐⭐⭐⭐ Buy this headphone amp!
*by K***K on May 20, 2021*

Compared to other headphone amps in the same category with AAA tech, XLR inputs, XLR headphone output, and 3 or so watts of output, the SMSL SH-9 is an excellent build, especially with the remote (!!!) and LCD screen. The only thing this is missing is outputs to be used as a preamp, but I did not buy it for preamp use - I wanted the headphone amplification and only that, with high performance. This unit is a top notch performer with clean sound, super channel separation, and plenty of power. I drive a few different headphones with this, but I usually use an Audeze LCD-2 (with Phazor) and this amp is an excellent match. The sound signature is totally neutral and complete at all frequencies, which the LCD-2 needs with it's laid back nature. No extra color needed in the signal - just the pure clean source as desired. My only nitpick is that the volume knob is clicky, but the tech behind the volume adjustments is definitely worth the tradeoff - super accurate and 100% balanced from right to left channels. Highly recommended.

### ⭐⭐⭐⭐ Very clear amp...
*by J***A on February 28, 2022*

This amplifier is good enough, it plays clear and doesn't add anything to your headphones sound. I know there is better sound out there, but for this price? I only own a sound card (was $150), a home theater amplifier (was $1100) and this amp (was $250), so cant really compare apples to apples. I own a pair of Sennheiser 660s and they sound great on this amplifier, just wish it had a little more bass and/or options on the amp itself. All in all, they sounded better than the sound card and worse than the home theater amp, so take that as you will.

## 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 Colombia*
*Store origin: CO*
*Last updated: 2026-01-31*