---
product_id: 246045794
title: "SH-9 Headphone Amplifier THX AAA Technology RCA/XLR Input 6.35MM Balanced Headphone Amplifier"
brand: "s.m.s.l"
price: "€ 798.95"
currency: EUR
in_stock: true
reviews_count: 7
category: "S.M.S.L"
url: https://www.desertcart.fi/products/246045794-sh-9-headphone-amplifier-thx-aaa-technology-rca-xlr-input
store_origin: FI
region: Finland
---

# 6W power @16Ω - powerhouse output Balanced stereo I/O - pristine audio clarity Full multi-protection - ultimate device safety SH-9 Headphone Amplifier THX AAA Technology RCA/XLR Input 6.35MM Balanced Headphone Amplifier

**Brand:** s.m.s.l
**Price:** € 798.95
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** 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?** € 798.95 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/246045794-sh-9-headphone-amplifier-thx-aaa-technology-rca-xlr-input)

## 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

- • **Crystal-Clear Audio:** THX AAA Technology ensures ultra-low THD+N (0.00006%) and a massive 137dB SNR for pristine, studio-grade listening.
- • **Balanced Connectivity:** Supports both balanced XLR and unbalanced RCA inputs/outputs for versatile, professional-grade setups.
- • **Power Meets Precision:** 6 watts into 16Ω headphones delivers robust, distortion-free sound for even the most demanding audiophiles.
- • **Smart Protection Suite:** Built-in DC, over-voltage, over-current, short-circuit, and thermal safeguards keep your gear safe and sound.
- • **Sleek & Functional Design:** Compact footprint with a 1.9-inch LCD and 256-level relay volume control for precise, pop-free adjustments.

## 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 and noise. It offers balanced XLR and unbalanced RCA inputs/outputs, comprehensive protection circuits, and a compact design with advanced relay volume control and LCD display, making it ideal for discerning audiophiles and professional desktop audio setups.

## 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: SmooTHX ... - Some time ago I had an SMSL SP200 and although it sounded clean, it sounded a bit brittle and sibilant, which I hate. I've owned many head'amps ... Darkvoice, Little Dots & a Sabaj D5 which had a fantastic DAC but lacklustre amp. Hence I thought I would give this one a go, glad I did. Super clean and smooth, plenty of power, with enough for hard to drive Planar phones. My Audeze LCD2's are tough to really get going, but this drives them perfectly. Really pleased and will be keeping for a long while!
Review: Average sound quality - After I’d bought the SMSL SU9 DAC & been throughly impressed by the quality I thought I’d buy the matching SH9 Headphone amp. I was really excited to set this up as it has THX branded parts & I really expected high quality sound for a great price. While the sound is acceptable it’s not groundbreaking. It’s a quite bright sounding amp. Instruments are sharp but to the point of being slightly harsh sounding. I’m not saying it’s a poor amp because it’s not. It’s clear & can drive headphones to a loud volume but it’s clear it’s a digital amplifier because of the brightness. I guess the price point is correct & anyone purchasing this amp with that in mind won’t be disappointed.

## 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 | 120 in Headphone Amplifiers |
| Guaranteed software updates until | unknown |
| 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:** 0.02 Volts
- **Mounting type:** Tabletop
- **Voltage:** 240 Volts

## Images

![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)

## Customer Reviews

### ⭐⭐⭐⭐⭐ SmooTHX ...
*by K***R on 18 December 2021*

Some time ago I had an SMSL SP200 and although it sounded clean, it sounded a bit brittle and sibilant, which I hate. I've owned many head'amps ... Darkvoice, Little Dots & a Sabaj D5 which had a fantastic DAC but lacklustre amp. Hence I thought I would give this one a go, glad I did. Super clean and smooth, plenty of power, with enough for hard to drive Planar phones. My Audeze LCD2's are tough to really get going, but this drives them perfectly. Really pleased and will be keeping for a long while!

### ⭐⭐⭐ Average sound quality
*by S***. on 30 November 2021*

After I’d bought the SMSL SU9 DAC & been throughly impressed by the quality I thought I’d buy the matching SH9 Headphone amp. I was really excited to set this up as it has THX branded parts & I really expected high quality sound for a great price. While the sound is acceptable it’s not groundbreaking. It’s a quite bright sounding amp. Instruments are sharp but to the point of being slightly harsh sounding. I’m not saying it’s a poor amp because it’s not. It’s clear & can drive headphones to a loud volume but it’s clear it’s a digital amplifier because of the brightness. I guess the price point is correct & anyone purchasing this amp with that in mind won’t be disappointed.

### ⭐⭐⭐⭐⭐ 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.

## 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 Finland*
*Store origin: FI*
*Last updated: 2026-03-07*