20 Best Fiio A3 Portable Headphone Amplifier [2024]

Are you looking for the best Fiio A3 Portable Headphone Amplifier? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling Fiio A3 Portable Headphone Amplifier.

We Recommended:

# Preview Product
1 FiiO A3 Portable Headphone Amplifier (Black) FiiO A3 Portable Headphone Amplifier (Black)
2 Moukey Headphone Amplifier DAC -Coaxial/RCA/ 6.35mm,1/4'' Headphone Output( with 1/8' to 1/4'... Moukey Headphone Amplifier DAC -Coaxial/RCA/ 6.35mm,1/4'' Headphone Output( with 1/8" to 1/4"...
3 iFi iDSD Diablo Purist Portable DAC/Headphone Amplifier - USB/SPDIF Input - 4.4mm Balanced Output -... iFi iDSD Diablo Purist Portable DAC/Headphone Amplifier - USB/SPDIF Input - 4.4mm Balanced Output...
4 FiiO Q3 Amplifier Headphone Amp High Resolution DAC DSD512 for Smartphone/PC/Laptop/Home/Car Audio... FiiO Q3 Amplifier Headphone Amp High Resolution DAC DSD512 for Smartphone/PC/Laptop/Home/Car...
5 FiiO BTR5-2021 Headphone Amps Bluetooth 5.0 Receiver High Resolution 384K/32Bit Native DSD256 USB... FiiO BTR5-2021 Headphone Amps Bluetooth 5.0 Receiver High Resolution 384K/32Bit Native DSD256 USB...
6 Monolith Liquid Platinum Headphone Amplifier - Designed by Alex Cavalli | 3.6 Watts Per Channel,... Monolith Liquid Platinum Headphone Amplifier - Designed by Alex Cavalli | 3.6 Watts Per Channel,...
7 Topping EX5 MQA Dual ES9038Q2M DAC Bluetooth 5.0 LDAC DSD512 PCM 768kHz Hi-Res Audio HiFi Decoder... Topping EX5 MQA Dual ES9038Q2M DAC Bluetooth 5.0 LDAC DSD512 PCM 768kHz Hi-Res Audio HiFi Decoder...
8 Monolith 124460 Portable Headphone Amplifier and Dac - Black with THX AAA Technology, Analog Input,... Monolith 124460 Portable Headphone Amplifier and Dac - Black with THX AAA Technology, Analog...
9 Khadas DAC Tone 2 Pro | Desktop Digital Analog Converter -Headphone Amplifier with USB-C/USB-C(I2S)... Khadas DAC Tone 2 Pro | Desktop Digital Analog Converter -Headphone Amplifier with...
10 FiiO A1 Portable Headphone Amplifier, Black FiiO A1 Portable Headphone Amplifier, Black
11 iFi xCAN Portable Balanced Dual Mono Headphone Amplifier with Bluetooth AptX and AAC Codecs for... iFi xCAN Portable Balanced Dual Mono Headphone Amplifier with Bluetooth AptX and AAC Codecs for...
12 Schiit Magni Heresy 100% Op-Amp-Based Headphone Amp and Preamp Schiit Magni Heresy 100% Op-Amp-Based Headphone Amp and Preamp
13 FiiO Headphone Amps Portable DAC USB Type-C coaxial 384kHz/32bit (E10K-TC Black) FiiO Headphone Amps Portable DAC USB Type-C coaxial 384kHz/32bit (E10K-TC Black)
14 HELM Audio Bolt DAC/AMP, USB-C Portable High-End DAC/Headphone Amplifier with MQA Playback. Mobile... HELM Audio Bolt DAC/AMP, USB-C Portable High-End DAC/Headphone Amplifier with MQA Playback....
15 SABAJ A10h Desktop Headphone Amplifier with Remote Control SABAJ A10h Desktop Headphone Amplifier with Remote Control
16 1Mii Lavaudio DS400 Portable DAC/Headphone Amplifier Stereo Supports 768K/32Bit and Native DSD512,... 1Mii Lavaudio DS400 Portable DAC/Headphone Amplifier Stereo Supports 768K/32Bit and Native...
17 SONY PHA-2 Headphone Amplifier SONY PHA-2 Headphone Amplifier
18 FiiO Headphone Amps Portable DAC USB Type-C coaxial 384kHz/32bit (E10K-TC black) FiiO Headphone Amps Portable DAC USB Type-C coaxial 384kHz/32bit (E10K-TC black)
19 LVY Headphone Amplifier A010 Portable Headphone Amp 3.5mm Audio Rechargeable Two-Stage GAIN Switch... LVY Headphone Amplifier A010 Portable Headphone Amp 3.5mm Audio Rechargeable Two-Stage GAIN...
SaleBestseller No. 1
FiiO A3 Portable Headphone Amplifier (Black)
  • Suitable for headphones ranging from 16 to 150 Ohms. Gain switch for matching output to headphone power needs.
  • Superior sound quality through expertly selected components and design, utilizing OPA1642 preamp and AD8397 amp section.
  • Fully discrete bass boost circuit increases output by 3.5dB at 60Hz, with bypass when off.
  • Handsome all aluminum body and chassis is sturdy and shielding against EM interference.
  • 1400mAh internal battery powers for up to 16 hours of use.
SaleBestseller No. 2
Moukey Headphone Amplifier DAC -Coaxial/RCA/ 6.35mm,1/4'' Headphone Output( with 1/8" to 1/4"...
  • 【OLED Display Screen To Show 5-Segment EQ】When you set or adjust the built-in 5-band EQ, the DAC amplifier display screen provides an intuitive...
  • 【96K/24Bit PCM and native CS4344】The headphone amps equipped with golden ratio of 96K/24Bit and native CS4344 DAC chip,make it closer to the...
  • 【Simply reliable USB power 】Connects to your laptop via its micro USB connection, which also provides the portable headphone amplifier with power,...
  • 【Different connection options】The USB DAC amp Equipped with three audio connection cables corresponding to the current popular desktop computers,...
  • 【 Exquisite Metal Structure】The high-class and elegant blue, coupled with the metal polished texture shell, looks bright. At the same time only...
Bestseller No. 3
iFi iDSD Diablo Purist Portable DAC/Headphone Amplifier - USB/SPDIF Input - 4.4mm Balanced Output -...
  • ✅ HIGH RESOLUTION - Dual Core Burr Brown True Native chipset supports all hi-res audio formats up to PCM 32 bit / 768kHz, DSD512, and MQA (decoder)
  • ✅ POWERFUL AMPLIFIER - Up to 4,100 mW headphone amplifier with balanced topology and 4.4mm output. Easily switch between Turbo (4,100mW) /Normal...
  • ✅ AMAZING SOUND - Ultra-Low noise, low distortion (0.00006%) OV2028 OpAmp, devil bass reproduction, and unbelievable resolution provide an...
  • ✅ PORTABLE - Rechargeable battery provides 6-12 hours of listening, or play while charging
  • ✅ CONNECTIONS - USB A, S/PDIF digital and optical audio inputs; 6.3mm and 4.4mm headphone outputs
Bestseller No. 4
FiiO Q3 Amplifier Headphone Amp High Resolution DAC DSD512 for Smartphone/PC/Laptop/Home/Car Audio...
  • [Get lossless sound]: Tilizing AKM’s new efficient AK4462 VELVET SOUND DAC and XMOS XUF208 USB chip allowing it to easily support decoding up to...
  • [THX AAA amp technology]: With THX’s patented feed-forward error correction topology, the AAA amps have low distortion, high power and a pure,...
  • [Get 2.5/3.5/4.4mm headphone jacks]: Multiple interfaces headphone jacks. The Q3 portable DAC is equipped with 4.4mm/2.5mm balanced and 3.5mm...
  • [Compatible with Android and iOS devices]: Use with a Lightning to Type C converter for iOS devices, Q3 portable amplifier compatible with...
  • [Portable and powerful battery]: The headphone amps Q3's battery is 1800mAH, it means 10 hours battery life, enough for you to enjoy it for a long...
SaleBestseller No. 5
FiiO BTR5-2021 Headphone Amps Bluetooth 5.0 Receiver High Resolution 384K/32Bit Native DSD256 USB...
  • [High-performance DAC ES9219C*2]: For extremely detailed reproduction of sound, stronger, better performance.
  • [Support full hi-res wireless Bluetooth format]: CSR8675 Bluetooth 5.0 receiver designed to deliver studio-quality sound through your ears WIRELESS -...
  • [Support MQA ]: A new addition to the updated BTR5 2021 bluetooth headphone amps is support for MQA Renderer, allowing for high-resolution,...
  • [XMOS XUF208 USB chip]: BTR5 2021 headphone amps is capable of asynchronous audio decoding under USB Audio Class 2.0. As a USB DAC, the BTR5 2021...
  • [More points/details]: 3.5+2.5mm dual outputs, cVc 8.0 noise cancellation, in-vehicle mode, OLED display, FiiO Music app, Dual crystal oscillators and...
SaleBestseller No. 6
Monolith Liquid Platinum Headphone Amplifier - Designed by Alex Cavalli | 3.6 Watts Per Channel,...
  • LUMINOUS TUBES. THE POWER OF SOLID STATE. SPECTACULAR SOUND. As an embedded tube/hybrid amplifier (DC coupled in to out, no coupling caps), the Liquid...
  • SINGLE ENDED and BALANCED INPUTS and OUTPUTS: With multiple inputs and outputs for balanced and single ended operation and easy front panel input...
  • KEEPS ITS COOL. The Platinum is ventilated with two long, screened slots on either side of the top and large screens on the bottom to ensure that it...
  • YOU'RE PROTECTED.The Liquid Platinum has a built-in, slow power on. It warms up the heaters first and then, after a short delay, brings up the SS...
  • It also includes a connection delay to the headphones and an active offset detector, just in case an internal fault or source fault applies too much...
Bestseller No. 7
Topping EX5 MQA Dual ES9038Q2M DAC Bluetooth 5.0 LDAC DSD512 PCM 768kHz Hi-Res Audio HiFi Decoder...
  • Dual ESS ES9038Q2M SABRE HIFI DAC Chips, MQA Full Decoding via USB
  • Support DSD512 Native and PCM 768kHz, MQA Full Decoding via USB
  • 2nd Generation 16 Core XMOS XU216, 4-PIN-XLR and 6.35mm Headphone Output
  • THD+N as low as 0.00010%, 1300mW X2 Output Power
  • DAC + Pre amp applicaion/ Bluetooth receiver/Tablet and phone DAC application
Bestseller No. 8
Monolith 124460 Portable Headphone Amplifier and Dac - Black with THX AAA Technology, Analog Input,...
  • The world's most linear amplifier technology. The THX achromatic audio amplifier (THX aiaa) ensures the ultimate no-compromise Headphone audio...
  • Akm 4493 DAC detailed sound. Exceptional musicality. The AKM AK4493 is akm's new flagship 32-bit stereo Premium DAC. It supports PCM inputs up to...
  • Dirac sensaround expand your headspace. Music is usually mixed with loudspeakers in mind, Not headphones. As a result, Headphone listening is often...
  • Versatile inputs digital or analog - We've got you covered. This amplifier features a USB and a 3.5mm Optical input, as well as an analog 3.5mm stereo...
  • Dynamic range control: Use the DRC functionality to set the shelving Filters. The DRC starts with low-pass and high-pass Filters to split the low and...
Bestseller No. 9
Khadas DAC Tone 2 Pro | Desktop Digital Analog Converter -Headphone Amplifier with USB-C/USB-C(I2S)...
  • Amaze Listening Experience:Khadas tone2 pro come with MQA decoding support The onboard XMOS XU216 processor enables bit-perfect, hardware-native, USB...
  • Powerful Amplifier:Portable DAC with ESS ES9038Q2M DAC has been paired with four powerful OPA1612 operational amplifiers, and three buffer amplifiers....
  • Power-Noise Isolation.: Balanced headphone amp includes a 4.4 mm balanced headphone jack in addition to the standard 3.5 mm single-end jack. The Tone2...
  • Compact Design: khadas dac amplifier has a bespoke design that is unique to the DAC world. Its slim aluminum enclosure accommodates many features. The...
  • High Performance :Khadas tone2 pro up to 32bit 768KHz sample rate, Coaxial Input192KHz 24bit,bit-perfect DSD512, and -118dB THD+N,3 Stage...
Bestseller No. 10
FiiO A1 Portable Headphone Amplifier, Black
  • Same function as A1 Silver but in stunning Black Color
  • With higher power and hi-fidelity output than smartphones, the A1 satisfies your need for more sound quality and quantity
  • The A1's volume buttons are made of Alps microswitches for sensitive and reliable operation
  • The A1 provides Flat, Bass1, Bass2, and Bass3 EQ modes, switchable simply by briefly pressing the power button,
  • Three-Color Status LED, Frequency response of 20 Hz to 20 kHz
SaleBestseller No. 11
iFi xCAN Portable Balanced Dual Mono Headphone Amplifier with Bluetooth AptX and AAC Codecs for...
  • POWERFUL - Powerful dual-mono headphone amplifier that can unleash the full dynamic range of hard to drive 600 ohm over ear phones while still driving...
  • WIRELESS - 'Cut the cord' and upgrade your existing wired headphones by using the built-in wireless Bluetooth input, which uses the aptX and AAC...
  • PORTABLE - Start listening right away and all day with a 2220mAh battery that can supply 12-18 hours of playback. Accessories include a USB C charging...
  • MUSIC YOUR WAY - 3D Holographic + and XBass II offer advanced analogue signal processing circuits that provide a more accurate and enjoyable sound by...
  • PRECSION - Pure Analogue Volume Control retaining full resolution at all volume levels, its smooth action and smooth sound deliver the sonic goods...
Bestseller No. 12
Schiit Magni Heresy 100% Op-Amp-Based Headphone Amp and Preamp
  • Utilizes super high quality parts, including a multiple paralleled output stage with feedforward. Made in USA.
SaleBestseller No. 13
FiiO Headphone Amps Portable DAC USB Type-C coaxial 384kHz/32bit (E10K-TC Black)
  • Easy to Operate Design: The refined E10K-TC is tiny enough to carry with you wherever you go but is also right at home on your desk to make your music...
  • Impeccable XMOS Decoding: The E10K-TC comes with the flagship XMOS XUF208 for better USB decoding. Compared to the original E10K, the USB Audio class...
  • Quality Chips to Delight your Ears: The DAC is the PCM5102, with improvements to the flatness and delays of the internal digital filter meaning better...
  • 2 Gain Levels and BASS Boost: The E10K-TC comes with high/low gain adjustment as well as a bass boost. High gain is for higher impedance headphones...
  • Low Noise Floor: Optimized active low pass and BASS circuit design ensure low noise floor in any situation, so your music is truly played back...
SaleBestseller No. 14
HELM Audio Bolt DAC/AMP, USB-C Portable High-End DAC/Headphone Amplifier with MQA Playback. Mobile...
  • STUDIO GRADE PORTABLE DIGITAL ANALOG CONVERTOR WITH MQA: BOLT delivers studio sound on the go from any mobile device across all listening formats....
  • HIGHEST FIDELITY SOUND: MQA (Master Quality Authenticated) rendering “unfolds” every detail of the original master recording as the artist and...
  • SMARTPHONE, TABLET, MAC & PC COMPATIBLE: USB-C input to a 3.5mm Headphone Output supporting playback of PCM files with sampling rates up to 384 kHz,...
  • AMPLIFIED AUDIO OUTPUT & HEADPHONE OUTPUT LEVEL MATCHING: Provides an average increase of +6 dB in devices with combined USB-audio output (where a...
  • THX CERTIFIED AUDIO OUTPUT: Exclusively designed for ultra-low harmonic, crosstalk & crossover distortion. Unlike other mobile MQA-DAC designs, the...
Bestseller No. 15
SABAJ A10h Desktop Headphone Amplifier with Remote Control
  • A10h is Sabaj new generation of headphone amplifier. Using SABAJ's exclusive design of low-distortion precision linear feedback circuit, to present...
  • The powerful driving force can reach an output power of 25mW even when pushing 600Ω headphones. Whether pushed by a low gain sensitivity headphones,...
  • A10h is divided into Pr0 mode (headphone output) and Pr1 mode (RCA pre-output). The purpose of this design is to allow your DAC to be directly...
  • It uses high-precision low-noise 256-level relay to control the volume, and has a design without impact sound. Whether it is a soft and delicate sound...
  • A10h is a highly cost-effective product positioned in the mid-range. Adopt multi-layer electrical board structure to strengthen the resistance to...
SaleBestseller No. 16
1Mii Lavaudio DS400 Portable DAC/Headphone Amplifier Stereo Supports 768K/32Bit and Native DSD512,...
  • 【𝐔𝐩 𝐭𝐨 𝟕𝟔𝟖𝐊𝐇𝐳/𝟑𝟐𝐁𝐢𝐭 𝐚𝐧𝐝 𝐍𝐚𝐭𝐢𝐯𝐞 𝐃𝐒𝐃𝟓𝟏𝟐】: Equipped with...
  • 【𝐂𝐨𝐚𝐱𝐢𝐚𝐥/𝐎𝐩𝐭𝐢𝐜𝐚𝐥 𝐃𝐢𝐠𝐢𝐭𝐚𝐥 𝐎𝐮𝐭𝐬】: Supports 3.5mm single-ended and 4.4mm...
  • 【𝐒𝐮𝐩𝐩𝐨𝐫𝐭 𝐟𝐮𝐥𝐥 𝐇𝐢-𝐫𝐞𝐬 𝐅𝐨𝐫𝐦𝐚𝐭】Can easily handle any low or high impedance...
  • 【𝐓𝐲𝐩𝐞-𝐂 𝐎𝐓𝐆 𝐈𝐧𝐩𝐮𝐭】:Only one line(USB OTG line) is required to complete all the inputs, no additional...
  • 【𝐔𝐧𝐛𝐞𝐥𝐢𝐞𝐯𝐚𝐛𝐥𝐲 𝐋𝐨𝐰 𝐍𝐨𝐢𝐬𝐞 𝐅𝐥𝐨𝐨𝐫】: Optimized active low-pass and BASS...
Bestseller No. 17
SONY PHA-2 Headphone Amplifier
  • Full Hi-Res audio: PCM 192kHz/24 bit, DSD 2.8/5.6MHz
  • Direct Digital Connection for PC and Apple devices1
  • Enhances non hi-res music sources (via analog input)
Bestseller No. 18
FiiO Headphone Amps Portable DAC USB Type-C coaxial 384kHz/32bit (E10K-TC black)
  • Easy to Operate Design: The refined E10K-TC is tiny enough to carry with you wherever you go but is also right at home on your desk to make your music...
  • Impeccable XMOS Decoding: The E10K-TC comes with the flagship XMOS XUF208 for better USB decoding. Compared to the original E10K, the USB Audio class...
  • Quality Chips to Delight your Ears: The DAC is the PCM5102, with improvements to the flatness and delays of the internal digital filter meaning better...
  • 2 Gain Levels and BASS Boost: The E10K-TC comes with high/low gain adjustment as well as a bass boost. High gain is for higher impedance headphones...
  • Low Noise Floor: Optimized active low pass and BASS circuit design ensure low noise floor in any situation, so your music is truly played back...
SaleBestseller No. 19
LVY Headphone Amplifier A010 Portable Headphone Amp 3.5mm Audio Rechargeable Two-Stage GAIN Switch...
  • Mini HiFi headphone amplifier,which make it convenient to carry, can output remarkable sound without distortion.
  • Amp Using Time: More Than 5 Hours, Load Impedance: 16-300Ω.
  • Two-stage gain switch enhances the signal input into the amp circuit for optimal performance of the headphones.
  • 3.5mm AUX input and output and SNR>120dB and Distortion 0.004% make it possibility to output not just louder sound, but a sharper.
  • Compatibility MP3, MP4, Phones, laptop Computer and 3.5mm Audio a Various of Digital Devices.

Having trouble finding a great Fiio A3 Portable Headphone Amplifier?

This problem is well understood by us because we have gone through the entire Fiio A3 Portable Headphone Amplifier research process ourselves, which is why we have put together a comprehensive list of the best Fiio A3 Portable Headphone Amplifiers available in the market today.

After hours of searching and using all the models on the market, we have found the best Fiio A3 Portable Headphone Amplifier for 2023. See our ranking below!

How Do You Buy The Best Fiio A3 Portable Headphone Amplifier?

Do you get stressed out thinking about shopping for a great Fiio A3 Portable Headphone Amplifier? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching Fiio A3 Portable Headphone Amplifier, which is why we have assembled a comprehensive list of the greatest Fiio A3 Portable Headphone Amplifier available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for Fiio A3 Portable Headphone Amplifier that you consider buying. Your questions might include the following:

  • Is it worth buying an Fiio A3 Portable Headphone Amplifier?
  • What benefits are there with buying an Fiio A3 Portable Headphone Amplifier?
  • What factors deserve consideration when shopping for an effective Fiio A3 Portable Headphone Amplifier?
  • Why is it crucial to invest in any Fiio A3 Portable Headphone Amplifier, much less the best one?
  • Which Fiio A3 Portable Headphone Amplifier are good in the current market?
  • Where can you find information like this about Fiio A3 Portable Headphone Amplifier?

We’re convinced that you likely have far more questions than just these regarding Fiio A3 Portable Headphone Amplifier, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for Fiio A3 Portable Headphone Amplifier, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible Fiio A3 Portable Headphone Amplifier. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an Fiio A3 Portable Headphone Amplifier buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available Fiio A3 Portable Headphone Amplifier currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of Fiio A3 Portable Headphone Amplifier has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an Fiio A3 Portable Headphone Amplifier?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your Fiio A3 Portable Headphone Amplifier.
  5. Customer Ratings: Number ratings grade Fiio A3 Portable Headphone Amplifier objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Fiio A3 Portable Headphone Amplifier.
  7. Product Quality: You don’t always get what you pay for with an Fiio A3 Portable Headphone Amplifier, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an Fiio A3 Portable Headphone Amplifier is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining Fiio A3 Portable Headphone Amplifier information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding Fiio A3 Portable Headphone Amplifier is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

Related Post:

FAQ:

Q: What is the best FiiO AMP?

A: 1) FiiO E10K The FiiO E10K portable headphone amp is lightweight, powerful, and provides tremendous bang for your buck. … 2) FiiO E12 Mont Blanc The E12 is heavier and more expensive than the E10K. It also does not come with the DAC chip. … 3) Magni Headphone Amplifier

Q: What are the most powerful portable amps?

A: 1 Yamaha Thr10c Mini Guitar Amplifier. … 2 Roland Cube Street Battery Powered Stereo Guitar Combo Amp. … 3 Blackstar Guitar Combo Amplifier. … 5 Marshall Ms2 Battery-Powered Micro Guitar Amplifier. … 6 Pignose 7-100 Legendary Portable Amplifier. … 7 Danelectro Electric Guitar Mini Amplifier Aqua N10a. … 8 Fender Mini ’57 Twin-Amp. …

Q: What does amplifier DO for headphones?

A: A headphone amplifier is simply a miniature power amplifier specifically designed to drive the tiny speakers inside headphones. Headphone amps are most useful with certain power-hungry high-impedance audiophile headphones that can benefit from the improved clean power of a dedicated amp.

Q: What is portable headphone amplifier?

A: Portable headphone amplifiers refer those amplifiers specialized in driving tiny headphone speakers. Hi-end headphones always has miniature speakers with high impedance which cannot give good sound unless they get enough power needed to drive them.