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Choosing the best portable digital audio players requires focusing on published specifications rather than marketing claims. We compared 9 models to help you find the right device for your needs. The HIFI Walker H2 64GB Zinc Alloy DAP leads this list because it offers physical controls and versatile connectivity options. All picks are ranked strictly by the specs listed on each product page, including DAC quality, battery life, and supported formats. This guide helps you decide which player fits your listening habits, whether you prioritize wired fidelity, Android app support, or compact portability.

Check your connection needs first

Most players here use wireless Bluetooth for streaming, but the FiiO M33 relies on a USB connection. You must choose based on how you plan to listen. If you need desktop-grade power via USB, pick the M33. For portable wireless listening, any other model on this list will work for your local library.

#ProductBest forPrice
1HIFI Walker H2 64GB Zinc Alloy DAP Best overalllisteners who prefer physical controls
2Surfans F20 HiFi MP3 Player Best budgetoffline high-resolution audio listening
3FiiO M21 Snapdragon 680 Portable Player Best premiumAudiophiles needing high power and Android apps
4Sony NW-A306 Portable Music Player Also greatUsers prioritizing 36-hour battery life and Android support
5Surfans F20 Pro Hi-Res Player Best spotifystreaming app users needing balanced output
6FiiO M33 Portable R2R Music Player Best usbAudiophiles wanting R2R DAC and high power output
7HIFI Walker H2 64GB Bluetooth DAP Also greatDedicated local music library playback
8Shanling M0 Pura Portable DAC/Amp Also greatusers needing balanced DAC output
9HIFI Walker H20 128GB Black DAP Also greatwired audio purists wanting balanced output

The best fit for you

  • You want the most compact model on the list – Shanling M0 Pura Portable DAC/Amp – The Shanling M0 Pura measures just 1.7 inches square and weighs under an ounce.
  • You need the longest battery life for travel – Sony NW-A306 Portable Music Player – The Sony NW-A306 provides 36 hours of playback time.
  • You want streaming apps and high power – FiiO M21 Snapdragon 680 Portable Player – The FiiO M21 runs Android 13 with a Snapdragon processor and robust amplification.
  • You want the best overall physical controls – HIFI Walker H2 64GB Zinc Alloy DAP – The HIFI Walker H2 offers versatile connectivity and physical controls for audiophiles.
  • You want the best budget option – Surfans F20 HiFi MP3 Player – The Surfans F20 delivers clear audio via an ESS DAC and DSD128 support.
1Best overall
HIFI Walker H2 64GB Zinc Alloy DAP

HIFI Walker H2 64GB Zinc Alloy DAP

Best for: listeners who prefer physical controls

Form Factor
Portable
DAC Chip
ESS ES9018K2M
Headphone Outputs
3.5mm
Expandable Storage
512GB
Bluetooth Version
Bluetooth 5.2
Connection
Wireless

The HIFI Walker H2 is a portable digital audio player built around the ESS ES9018K2M DAC. It supports high-resolution formats like DSD128, FLAC, and WAV, delivering 107dB SNR for detailed sound. You get Bluetooth 5.2 with aptX for wireless listening, plus USB DAC and line-out options. The device includes a 64GB microSD card and supports up to 512GB of storage. Its zinc alloy body weighs 5.36 ounces and offers about 10 hours of playback.

Pros
  • ESS ES9018K2M DAC with 107dB SNR
  • Bluetooth 5.2 with aptX support
  • Includes 64GB microSD card
  • Zinc alloy chassis with physical controls
  • USB DAC and line-out connectivity
Cons
  • 10 hours of battery life is lower than competitors
  • 5.36-ounce weight is heavier than some peers
  • DSD128 support is less than DSD512 models
Good fit if
  • You want a dedicated player with physical buttons
  • You need Bluetooth transmitter and receiver modes
  • You prefer wired connections like line-out
Skip if
  • You need Android app support
  • You require DSD512 decoding
  • You want a touchscreen interface

Verdict: The HIFI Walker H2 64GB Portable Player suits listeners who value physical controls and versatile connectivity options over smartphone-like features. It fits those who prioritize DAC quality and wired flexibility.

2Best budget
Surfans F20 HiFi MP3 Player

Surfans F20 HiFi MP3 Player

Best for: offline high-resolution audio listening

Form Factor
Portable
DAC Chip
ESS ES9018K2M
Headphone Outputs
3.5mm
Max Audio Resolution
32-bit/384kHz, DSD128
Expandable Storage
512GB
Bluetooth Version
Bluetooth 5.2

The Surfans F20 is a portable digital audio player built around the ESS ES9018K2M DAC. It supports 32-bit/384kHz decoding and native DSD128 for high-resolution offline listening. You get Bluetooth 5.2 for wireless audio and a 1.5V line-out for external amps. The device includes a 64GB microSD card and expands to 512GB. It offers up to 10 hours of playback in a compact 3.7-inch frame.

Pros
  • ESS ES9018K2M DAC for high-resolution audio
  • Supports 32-bit/384kHz and native DSD128
  • Includes 64GB microSD card, expandable to 512GB
  • Bluetooth 5.2 and 1.5V line-out connectivity
Cons
  • Battery life is limited to 10 hours
  • Storage capacity is lower than competitors with 128GB internal memory
  • Weight is 6.35 ounces, heavier than lighter portable options
Good fit if
  • You need a dedicated device for offline FLAC and DSD files
  • You want physical controls like an ALPS scroll wheel
  • You require a line-out for car or home audio systems
Skip if
  • You need internal storage larger than 64GB without a card
  • You prioritize long battery life over 10 hours
  • You want a lighter device under 6 ounces

Verdict: The Surfans F20 Portable HiFi Player delivers clear, detailed audio through its ESS DAC and supports high-resolution formats like DSD128. It fits listeners who want physical controls and expandable storage for offline music libraries.

3Best premium
FiiO M21 Snapdragon 680 Portable Player

FiiO M21 Snapdragon 680 Portable Player

Best for: Audiophiles needing high power and Android apps

Form Factor
Portable
DAC Chip
Quad CS43198
Headphone Outputs
3.5mm, 4.4mm
Output Power
950mW
Operating System
Android 13
Internal Storage
64GB

The FiiO M21 is a portable digital audio player running Android 13 with a Snapdragon 680 processor. It features four CS43198 DAC chips and a fully balanced 2-stage amplification circuit. You get dual 3.5mm and 4.4mm outputs plus SPDIF support. This device suits listeners who want high-power desktop mode and versatile connectivity for lossless DSD and Hi-Res audio.

Pros
  • Snapdragon 680 processor with 4GB RAM and 64GB storage
  • Quad CS43198 DAC chips with fully balanced 2-stage amplification
  • Dual 3.5mm and 4.4mm headphone outputs with independent line amplification
  • Desktop Mode for external power operation to preserve battery life
Cons
  • Weighs 10.6 ounces, which is heavier than many compact players
  • Limited to 64GB internal storage compared to higher-capacity competitors
Good fit if
  • You want to run Android music apps directly on the device
  • You need high-power balanced outputs for demanding headphones
  • You prefer desktop mode for stationary listening sessions
Skip if
  • You require more than 64GB of internal storage
  • You prioritize a lightweight and compact form factor
  • You only need basic Bluetooth playback without Android apps

Verdict: FiiO M21 Android 13 Hi-Res Player offers robust amplification and smart features for audiophiles who value power and versatility over portability.

4Also great
Sony NW-A306 Portable Music Player

Sony NW-A306 Portable Music Player

Best for: Users prioritizing 36-hour battery life and Android support

Form Factor
Portable
Operating System
Android
Max Audio Resolution
DSD up to 11.2MHz
Internal Storage
32GB
Connection
Wireless
Features
Bluetooth, USB-C, MP3 Player, Wi-Fi Streaming

The Sony NW-A306 is a portable digital audio player featuring a rigid aluminum frame and Android support. It handles DSD audio up to 11.2MHz and offers up to 36 hours of 44.1KHz FLAC playback. The device weighs 3.99 ounces and measures 2.22 x 0.46 x 3.87 inches. It includes Wi-Fi and Bluetooth connectivity. This model suits listeners who prioritize battery life and a lightweight, pocket-friendly build.

Pros
  • Up to 36 hours of 44.1KHz FLAC playback
  • DSD audio formats up to 11.2MHz
  • Rigid aluminum frame construction
  • Android operating system support
  • Wi-Fi and Bluetooth connectivity
Cons
  • 32GB internal storage is lower than the 64GB or 128GB options in this list
  • 3.99 ounces weight is heavier than some compact competitors
  • 2.22 x 0.46 x 3.87 inches dimensions are larger than ultra-compact players
Good fit if
  • You want up to 36 hours of battery life for long sessions
  • You need Android support for app integration
  • You prefer a lightweight aluminum build for pocket carry
Skip if
  • You require more than 32GB of internal storage
  • You need a lighter device under 3.99 ounces
  • You want a smaller footprint than 2.22 x 0.46 x 3.87 inches

Verdict: Sony NW-A306 32GB Portable Player fits users who value extended 36-hour battery life and Android compatibility in a lightweight aluminum chassis. It is a practical choice for those who prioritize battery endurance over maximum internal storage capacity.

5Best spotify
Surfans F20 Pro Hi-Res Player

Surfans F20 Pro Hi-Res Player

Best for: streaming app users needing balanced output

Form Factor
Portable
DAC Chip
Dual ESS9018K2M
Headphone Outputs
3.5mm single-ended, 4.4mm balanced
Output Power
125mW/32Ω (3.5mm), 500mW/32Ω (4.4mm)
Operating System
Android 12
Max Audio Resolution
DSD512, 192kHz/24bit

The Surfans F20 Pro is a portable music player running Android 12. It features dual ESS9018 DACs and supports DSD512 for high-resolution audio. The device includes 32GB of internal storage and a 32GB microSD card. You can expand capacity up to 1TB. It connects via Bluetooth 5.0 with LDAC and dual-band Wi-Fi. This model is designed for listeners who want streaming app support alongside local file playback.

Pros
  • Dual ESS9018 DAC chips for low distortion
  • Supports DSD512 and 192kHz/24bit formats
  • 4.4mm balanced output delivers 500mW power
  • Android 12 OS with Spotify and Tidal
  • Expandable storage up to 1TB via microSD
Cons
  • Bluetooth 5.0 is older than the 5.2 found on competing models
  • 32GB internal storage is lower than the 64GB or 128GB options available elsewhere
  • 2.7-inch screen is smaller than the 4-inch displays on other picks
Good fit if
  • You want to stream Spotify directly from a portable device
  • You need a 4.4mm balanced output for high-impedance headphones
  • You prefer a metal chassis with a tactile volume wheel
Skip if
  • You require the latest Bluetooth 5.3 standard for connectivity
  • You need more than 32GB of internal storage without a card
  • You prefer a larger screen for easier navigation

Verdict: The Surfans F20 Pro Hi-Res Android Player offers strong audio performance with dual ESS9018 DACs and DSD512 support. It fits users who prioritize streaming app integration and balanced output power in a compact metal body.

6Best usb
FiiO M33 Portable R2R Music Player

FiiO M33 Portable R2R Music Player

Best for: Audiophiles wanting R2R DAC and high power output

Form Factor
Portable
DAC Chip
R2R resistor ladder DAC
Output Power
1100mW + 1100mW
Internal Storage
128GB
Connection
USB
Features
Display

The FiiO M33 is a portable HiFi music player featuring a True R2R DAC and a 5.5-inch Full HD display. It runs on a Snapdragon 680 processor with 8GB RAM and 128GB storage. The device includes an XMOS XU316 USB processor and balanced output. It suits audiophiles who want desktop-grade architecture in a compact form factor with AUTO EQ support.

Pros
  • True R2R DAC with FLAT and WARM sound profiles
  • Snapdragon 680 processor with 8GB RAM and 128GB storage
  • XMOS XU316 dedicated USB audio processor
  • 5.5-inch 1080×2160 touchscreen display
  • Up to 1100mW + 1100mW balanced output power
Cons
  • Weighs 1.1 pounds, which is heavier than typical portable players
  • 128GB storage capacity is lower than some competitors offering 64GB cards or higher internal limits
Good fit if
  • You want a True R2R DAC for analog-inspired sound
  • You need high balanced output power for full-size headphones
  • You prefer a large 5.5-inch touchscreen interface
Skip if
  • You prioritize lightweight portability under 1 pound
  • You need maximum internal storage capacity
  • You prefer a compact form factor without a large display

Verdict: The FiiO M33 R2R Portable Player fits audiophiles seeking desktop-grade R2R architecture and high power output in a portable device. Its large screen and robust processor support detailed listening, though the weight and storage may limit some users.

7Also great
HIFI Walker H2 64GB Bluetooth DAP

HIFI Walker H2 64GB Bluetooth DAP

Best for: Dedicated local music library playback

Form Factor
Portable
DAC Chip
ESS ES9018K2M
Headphone Outputs
3.5mm
Expandable Storage
512GB
Bluetooth Version
Bluetooth 5.2
Connection
Wireless

The HIFI Walker H2 is a portable digital audio player built for local music libraries. It features an ESS ES9018K2M DAC for high-resolution playback of DSD128 and FLAC files. You get 64GB of storage with a 512GB expansion option. Bluetooth 5.2 with aptX allows wireless listening. The zinc alloy body includes physical controls and a 2.0-inch display. Battery life reaches 10 hours for daily use.

Pros
  • ESS ES9018K2M DAC for detailed sound
  • Supports DSD128 and FLAC formats
  • Bluetooth 5.2 with aptX support
  • Physical scroll wheel and buttons
  • Up to 10 hours of playback
Cons
  • Smaller 2.0-inch display compared to larger screens on other models
  • Lower 64GB base capacity versus 128GB options in the list
  • Shorter 10-hour battery life compared to longer-lasting players
Good fit if
  • You prefer physical buttons over touchscreens
  • You want dedicated local music playback
  • You need Bluetooth 5.2 wireless connectivity
Skip if
  • You require Android app support
  • You need a large high-resolution display
  • You want built-in streaming services

Verdict: HIFI Walker H2 64GB Portable Player suits listeners who prioritize wired audio quality and physical controls. It is a solid choice for carrying local high-resolution libraries without smartphone dependency.

8Also great
Shanling M0 Pura Portable DAC/Amp

Shanling M0 Pura Portable DAC/Amp

Best for: users needing balanced DAC output

Form Factor
Portable
DAC Chip
Dual CS43131
Headphone Outputs
3.5mm
Output Power
100mW@32Ω, 250mW@32Ω
Operating System
MTouch OS
Max Audio Resolution
32bit/384kHz, DSD 128

The Shanling M0 Pura is a compact portable DAC and amplifier designed for high-resolution audio. It features a dual CS43131 DAC setup supporting 32-bit/384kHz and DSD 128. The device includes Bluetooth 5.0 with LDAC support and a 650mAh battery offering up to 9.5 hours of playback. It weighs 35.8g and measures 1.7 by 1.7 by 0.55 inches. This unit requires a separate MicroSD card for storage.

Pros
  • Dual CS43131 DACs for high-fidelity output
  • 4.4mm balanced output delivers 250mW power
  • Bluetooth 5.0 supports LDAC and aptX
  • Lightweight 35.8g portable build
  • 32-bit/384kHz and DSD 128 support
Cons
  • No internal storage for music files
  • 9.5-hour battery life is modest
  • Requires separate MicroSD card for use
Good fit if
  • You want a lightweight DAC for your phone
  • You prioritize balanced output power
  • You already have high-res music files
Skip if
  • You need built-in music storage
  • You require a standalone MP3 player
  • You need extended battery life over 10 hours

Verdict: Shanling M0 Pura Portable DAC is a compact, high-performance audio adapter for users who already store music on SD cards. It fits you best if you need strong balanced output in a tiny package.

9Also great
HIFI Walker H20 128GB Black DAP

HIFI Walker H20 128GB Black DAP

Best for: wired audio purists wanting balanced output

Form Factor
Portable
DAC Chip
ESS9038Q2M
Headphone Outputs
4.4mm balanced, 3.5mm
Max Audio Resolution
DSD256, 32bit/768kHz
Expandable Storage
Up to 512GB
Bluetooth Version
Bluetooth 5.1

The HIFI Walker H20 is a portable digital audio player focused on high-resolution wired and wireless listening. It uses the ESS9038Q2M DAC to support DSD256 and lossless formats like FLAC. You get a 4-inch touchscreen, aluminum body, and dual outputs including a 4.4mm balanced jack. Bluetooth 5.1 with LDAC adds wireless flexibility. The included 128GB card and 10-hour battery life suit offline listening.

Pros
  • ESS9038Q2M DAC supports DSD256 and lossless formats
  • 4.4mm balanced and 3.5mm headphone outputs
  • Bluetooth 5.1 with LDAC and aptX-HD
  • 4-inch touchscreen with aluminum alloy body
  • Includes 128GB TF card, expandable to 512GB
Cons
  • Bluetooth 5.1 is older than the 5.2 found in some competitors
  • 128GB storage is lower than the 32GB internal plus SD options or higher capacities in other picks
  • 10-hour battery life is modest compared to larger players
Good fit if
  • You want dedicated music playback without smartphone distractions
  • You prefer wired balanced connections for high fidelity
  • You need a portable player with a touchscreen interface
Skip if
  • You require Android apps or streaming services like Spotify
  • You need Bluetooth 5.2 or newer for maximum wireless range
  • You want a player with more than 128GB of internal storage

Verdict: HIFI Walker H20 128GB Portable Player delivers solid HiFi specs with its ESS9038Q2M DAC and balanced output. It fits listeners who value wired quality and a focused interface over smart features.

Specifications side by side

SpecHIFI Walker H2 64GB Zinc Alloy DAPSurfans F20 HiFi MP3 PlayerFiiO M21 Snapdragon 680 Portable PlayerSony NW-A306 Portable Music PlayerSurfans F20 Pro Hi-Res PlayerFiiO M33 Portable R2R Music PlayerHIFI Walker H2 64GB Bluetooth DAPShanling M0 Pura Portable DAC/AmpHIFI Walker H20 128GB Black DAP
DAC ChipESS ES9018K2MESS ES9018K2MQuad CS43198–Dual ESS9018K2MR2R resistor ladder DACESS ES9018K2MDual CS43131ESS9038Q2M
Headphone Outputs3.5mm3.5mm3.5mm, 4.4mm–3.5mm single-ended, 4.4mm balanced–3.5mm3.5mm4.4mm balanced, 3.5mm
Output Power––950mW–125mW/32Ω (3.5mm), 500mW/32Ω (4.4mm)1100mW + 1100mW–100mW@32Ω, 250mW@32Ω–
Operating System––Android 13AndroidAndroid 12––MTouch OS–
Max Audio Resolution–32-bit/384kHz, DSD128–DSD up to 11.2MHzDSD512, 192kHz/24bit––32bit/384kHz, DSD 128DSD256, 32bit/768kHz
Internal Storage––64GB32GB32GB128GB–––
Expandable Storage512GB512GB––1TB–512GB2TBUp to 512GB
Bluetooth VersionBluetooth 5.2Bluetooth 5.2––Bluetooth 5.0–Bluetooth 5.2Bluetooth 5.0Bluetooth 5.1
ConnectionWirelessWirelessWirelessWirelessWirelessUSBWirelessWirelessWireless
FeaturesBluetooth, MP3 Player, Lossless DSDBluetooth, MP3 Player, Lossless DSDBluetooth, MP3 Player, Lossless DSD, Hi-Res Audio, LDACBluetooth, USB-C, MP3 Player, Wi-Fi StreamingBluetooth, MP3 Player, 4.4mm Balanced, LDAC, Wi-Fi Streaming, SpotifyDisplayBluetooth, MP3 Player, Lossless DSDBluetooth, USB-C, MP3 Player, Lossless DSD, LDACBluetooth, MP3 Player, 4.4mm Balanced, Lossless DSD
UseAudiophilesAudiophilesSmartphonesSmartphones–AudiophilesAudiophilesAudiophilesAudiophiles
ColorBlackGreyDark BlueBlackgrayDark BlueBlackOrangeBlack
Form FactorPortablePortablePortablePortablePortablePortablePortablePortablePortable
TypeDAC/Amp–DAC/Amp–DAC/AmpDAC/AmpDAC/AmpDAC/AmpDAC/Amp
Output––––BalancedBalanced––Balanced
Processor––Snapdragon––Snapdragon–––
Dimensions0.59 × 2.17 × 3.54 inches3.7 × 2.2 × 0.6 inches–3.56 × 1.81 × 6.5 inches4.01 × 0.62 × 2.33 inches––0.55 × 1.7 × 1.7 inches–
Weight5.36 ounces6.35 ounces10.6 ounces3.99 ounces6.08 ounces1.1 pounds0.92 ounces––
SizeH2-64GB––2.22 x 0.46 x 3.87 inch––64GB–128GB
ModelH2Surfans-F20M21NWA306/BF20 Pro GF1001MH2Shanling M0 Pura MP3 Player–

If you also practice with keyboard audio gear, specs for the best portable digital pianos list headphone output options.

How to choose the right one

Check physical controls

You should look for physical buttons if you prefer tactile feedback over touchscreens. The HIFI Walker H2 64GB Zinc Alloy DAP features a zinc alloy body with dedicated controls for easy navigation. This design suits listeners who want precise input without relying on a glass interface. It offers a solid build for daily handling. If you prefer a screen-only experience, you might skip this model. Physical controls add durability and ease of use for audiophiles who value direct interaction with their music library.

Verify output types

You need to check if the device offers a balanced output for better signal clarity. The Surfans F20 Pro Hi-Res Player includes a 4.4mm balanced port for stronger audio performance. This feature is ideal for users who want high power and reduced noise. The HIFI Walker H20 128GB Black DAP also provides a 4.4mm balanced output for wired purists. If you only use standard 3.5mm headphones, a standard output may suffice. Balanced outputs require compatible cables, so ensure your gear matches the connection type.

Assess processor power

You should consider the processor if you plan to install third-party apps. The FiiO M21 Snapdragon 680 Portable Player runs Android 13 with a Snapdragon processor for robust performance. This setup supports streaming apps like Spotify and offers versatile smart features. It fits audiophiles needing high power and app compatibility. Other models focus on dedicated playback without full operating systems. If you want a dedicated music-only device, a simpler processor is better. Choose the M21 only if you need a full Android experience.

Compare weight and size

You must evaluate the dimensions for portability and comfort during extended use. The Sony NW-A306 Portable Music Player is lightweight at 3.99 ounces, making it easy to carry. It fits users who prioritize battery life and a slim aluminum chassis. The Shanling M0 Pura is extremely compact, measuring 1.7 inches square. It serves as a small DAC/amp for on-the-go listening. Heavier models like the FiiO M33 weigh 1.1 pounds and suit stationary use. Check the weight to ensure it matches your carrying habits.

Review connectivity options

You should check the connection type to ensure compatibility with your setup. Most players here use wireless Bluetooth for streaming and playback. The FiiO M33 Portable R2R Music Player relies on a USB connection for desktop-grade power. You must choose based on whether you need portable wireless freedom or wired desktop performance. The Sony NW-A306 supports Wi-Fi streaming for added versatility. If you need a direct USB link for your computer, the M33 is the specific choice. Verify your cable needs before purchasing.

Frequently asked questions

Which portable digital audio player supports the highest resolution audio formats?

The Surfans F20 Pro offers DSD512 support, which is the highest resolution listed here. It also features dual ESS9018 DACs for precise signal processing. This makes it ideal for listeners who want the most detailed playback possible from their local library or streaming apps.

Do any of these players include a balanced output for better sound?

Yes, the Surfans F20 Pro and the HIFI Walker H20 both feature 4.4mm balanced outputs. The FiiO M33 also provides balanced output alongside its R2R DAC architecture. These outputs help reduce noise and improve channel separation for a cleaner listening experience.

Which model is best for users who want to run Android apps?

The FiiO M21 runs on Android 13 and uses a Snapdragon processor. It is designed for audiophiles who need smart features and app versatility. The Surfans F20 Pro also runs Android, offering Spotify integration and Wi-Fi streaming alongside its high-performance DACs.

What is the lightest portable digital audio player on this list?

The HIFI Walker H2 64GB Bluetooth DAP is the lightest at 0.92 ounces. The Sony NW-A306 is also very light at 3.99 ounces. Both are easy to carry, though the HIFI Walker model is significantly lighter than the others in this group.

Which player is best for someone who prefers physical buttons over touchscreens?

The HIFI Walker H2 64GB Zinc Alloy DAP is built for listeners who prefer physical controls. It features a zinc alloy body with dedicated tactile buttons. This design allows for easy navigation without relying on a touchscreen, which is useful for precise track skipping.

Which portable player uses R2R DAC technology for a different sound signature?

The FiiO M33 is the only model here that uses R2R DAC architecture. It delivers desktop-grade sound quality in a portable form factor. This technology is preferred by audiophiles who want a specific analog-like sound character rather than standard delta-sigma conversion.

See also