7Hz x Crinacle Zero:2 (Salnotes Zero 2) Dynamic Driver IEM – Blue

Experience refined tuning, deeper bass, and impressive detail with the 7Hz x Crinacle Zero:2 (Salnotes Zero 2) Dynamic Driver IEM – Blue, the updated generation of the popular Salnotes Zero developed in collaboration with renowned audio reviewer Crinacle.

The Zero:2 features an upgraded 10mm dual-cavity dynamic driver with a PU + metal composite diaphragm, delivering faster response, stronger bass impact, and improved clarity. Compared with the original Salnotes Zero, the Zero:2 adds approximately 3dB more low-frequency energy, creating a fuller and more engaging sound while keeping the midrange clean and balanced.

Finished in Blue, this version combines enthusiast-level IEM tuning with a detachable 0.78mm 2-pin cable and an upgraded silver-plated high-purity oxygen-free copper cable, making it an excellent choice for music, competitive gaming, movies, handheld gaming, and everyday listening. Blue is one of the official Zero:2 color options offered alongside Silver, Orange, and Pink.

Key Features

• 7Hz x Crinacle Collaboration – Tuned with input from Crinacle to deliver excellent tonal balance at an accessible price point.
• Upgraded 10mm Dynamic Driver – New dual-cavity driver design improves responsiveness, bass impact, and clarity.
• PU + Metal Composite Diaphragm – Designed for faster diaphragm movement and precise transient response.
• Enhanced Bass Response – Approximately +3dB more low-frequency gain compared with the original Salnotes Zero.
• Warmer, Fuller Midrange – Adds body to vocals and instruments while maintaining clean separation from the bass.
• 10Hz–20kHz Frequency Response – Wide frequency range suitable for music, gaming, movies, and general listening.
• 32Ω Impedance – Easy to pair with many portable and desktop audio sources.
• 108dB/V @ 1kHz Sensitivity – Efficient enough for use with typical portable devices and DAC adapters.
• Low Distortion – Rated at <1% THD at 1kHz.
• Detachable 0.78mm 2-Pin Cable – Allows easier cable replacement and upgrades.
• Silver-Plated OFC Cable – High-purity oxygen-free copper cable with silver plating and coaxial construction.
• Multiple Cable Versions Available – Manufacturer offers 3.5mm no-mic, 3.5mm mic, and Type-C mic configurations.
• Multiple Silicone Ear Tips – Different sizes help users achieve a secure acoustic seal and comfortable fit.
• Passive Noise Isolation – In-ear fit helps reduce surrounding noise without electronic ANC.
• No Battery Required – Fully wired operation means no charging or Bluetooth pairing.
• Blue Finish – Official Blue color option gives the Zero:2 a distinctive modern appearance.
• Excellent for Music & Gaming – Balanced tuning, improved bass, and lightweight IEM construction suit a wide range of content.

Specifications

The manufacturer confirms the Zero:2's 10mm driver, 32Ω impedance, 10Hz–20kHz response, <1% THD, detachable 0.78mm 2-pin connection, and 3.5mm/Type-C cable options.

Tuned in Collaboration with Crinacle

The Zero:2 continues the collaboration between 7Hz and Crinacle, building upon the tuning approach that helped make the original Salnotes Zero popular among budget-IEM enthusiasts.

For the second generation, the tuning was adjusted to retain the tonal balance of the original while delivering more low-frequency impact and additional warmth.

The result focuses on:

• Stronger Bass
• Clear Vocals
• Natural Midrange
• Controlled Treble
• Good Tonal Balance
• More Engaging Overall Sound

This makes the Zero:2 suitable for listeners who appreciated the original Zero but wanted a fuller and more energetic presentation.

New 10mm Dual-Cavity Dynamic Driver

The Zero:2 uses a newly developed 10mm dual-cavity dynamic driver rather than simply carrying over the original driver's design.

Its upgraded PU + metal composite diaphragm is designed for faster movement and improved responsiveness, allowing the driver to produce stronger bass hits while maintaining precision and clarity.

This can benefit:

• Bass Impact
• Bass Extension
• Transient Speed
• Instrument Definition
• Vocal Clarity
• Gaming Effects
• Music Dynamics

Approximately 3dB More Bass

One of the most important upgrades over the original Salnotes Zero is the bass tuning.

7Hz states that the Zero:2 adds approximately 3dB more low-frequency energy, creating deeper, more powerful bass with improved impact and extension.

The additional low end works especially well with:

• Hip-Hop
• Electronic Music
• Pop
• Rock
• R&B
• Movie Soundtracks
• Gaming Explosions
• Vehicle Sounds
• Cinematic Effects

The Zero:2 therefore delivers a more engaging presentation without abandoning the balanced tuning philosophy of the original.

Fuller & Warmer Midrange

The Zero:2 also introduces extra warmth into the lower midrange.

7Hz describes the updated tuning as providing greater body to instrument and vocal fundamentals while keeping melodies clean and avoiding excessive bass bleed into the midrange.

This can give more weight to:

• Male Vocals
• Female Vocals
• Guitar
• Piano
• Drums
• Acoustic Instruments
• Game Dialogue

Balanced Overall Tuning

Rather than focusing only on heavy bass, the Zero:2 aims for a balanced and versatile sound signature.

The additional low-frequency energy is paired with clean mids and controlled upper frequencies, making the IEM suitable for listeners who use one earphone across many music genres and gaming applications.

10Hz–20kHz Frequency Response

The Zero:2 is rated for a frequency-response range of:

10Hz – 20,000Hz.

The extended low-frequency specification complements the Zero:2's enhanced bass tuning, while the upper range covers the standard audible treble spectrum.

32Ω Impedance

With a rated impedance of 32 ohms, the Zero:2 is suitable for many everyday audio sources.

Compatible source types can include:

• Smartphones with 3.5mm Output
• USB-C DAC Adapters
• Laptops
• Desktop PCs
• Gaming Handhelds
• Portable DACs
• Digital Audio Players
• Compatible Game Controllers

A large desktop headphone amplifier is generally unnecessary for normal portable use.

108dB/V Sensitivity

The Zero:2 is rated at approximately 108dB/V @ 1kHz.

Combined with its 32Ω impedance, this makes the IEM practical for portable devices while still allowing users to pair it with a dedicated DAC if they want a higher-quality audio source.

Upgraded Silver-Plated OFC Cable

The stock cable is another important improvement.

The Zero:2 includes a high-purity oxygen-free copper cable with silver plating. 7Hz describes it as using a coaxial construction designed to improve durability and audio transmission.

Advantages include:

• Detachable Design
• Easier Cable Replacement
• Aftermarket Upgrade Options
• Improved Long-Term Serviceability
• Durable Construction

Detachable 0.78mm 2-Pin Connection

The Zero:2 uses a 0.78mm 2-pin detachable interface, a popular connection style among enthusiast IEMs.

A detachable cable means that cable damage does not automatically require replacing the entire IEM.

It also allows users to install compatible aftermarket cables if they later want different:

• Terminations
• Cable Lengths
• Microphone Options
• Materials
• Styling

3.5mm & Type-C Versions

7Hz currently offers several Zero:2 cable configurations:

• 3.5mm – No Microphone
• 3.5mm – With Microphone
• USB Type-C – With Microphone

For ecommerce accuracy, the exact connection should be matched to your individual stock SKU.

If your Blue unit is the standard 3.5mm no-microphone version, it should be listed as a wired audio-only IEM without an inline microphone.

Multiple Silicone Ear Tips

The package includes multiple silicone ear-tip sizes so users can find the most suitable seal for their ears.

Selecting the right tip is particularly important with an IEM because fit directly affects:

• Bass Response
• Noise Isolation
• Comfort
• Stability
• Overall Tonal Balance

A poor seal can significantly reduce low-frequency performance.

Passive Noise Isolation

The Zero:2 does not use Active Noise Cancellation.

Instead, surrounding sound is reduced naturally by the physical in-ear seal created by the ear tips.

This is useful for:

• Home Listening
• PC Gaming
• Gaming Cafés
• Commuting
• Travel
• Office Use

Passive isolation also requires no batteries or additional electronics.

Excellent for Music

The Zero:2's combination of enhanced bass, natural midrange, and balanced tuning makes it suitable for a broad range of music styles.

Great for:

• Pop
• Rock
• Hip-Hop
• Electronic
• R&B
• Jazz
• Classical
• Acoustic
• Metal
• Soundtracks

Listeners who prefer the tonal balance of the original Zero but want stronger low-end impact may find the Zero:2 particularly appealing.

Great for Competitive Gaming

IEMs have become increasingly popular for gaming because they provide a lightweight alternative to full-size gaming headsets.

The Zero:2 can reproduce important game sounds including:

• Enemy Footsteps
• Gunfire
• Reloads
• Vehicle Movement
• Environmental Effects
• Directional Audio Cues
• Dialogue

Its relatively balanced sound means positional details remain audible while the enhanced bass gives weapons, vehicles, and explosions more impact.

Great for FPS Games

The Zero:2 is especially suitable for players who want one IEM for both competitive gaming and music.

Ideal for:

• Counter-Strike 2
• VALORANT
• Call of Duty
• Fortnite
• Apex Legends
• PUBG
• Rainbow Six Siege
• Battlefield
• Overwatch

The wired connection also avoids Bluetooth latency.

Great for Single-Player Gaming

The stronger bass response also helps the Zero:2 deliver a more cinematic experience than leaner neutral-focused earphones.

It works well with:

• RPG Games
• Action Games
• Horror Games
• Racing Games
• Open-World Games
• Story-Driven Titles

Soundtracks, environmental effects, engines, explosions, and cinematic scenes benefit from the additional low-frequency energy.

Great for Gaming Handhelds

The Zero:2 can be a practical companion for handheld gaming systems equipped with a compatible audio output.

Potential uses include compatible:

• Steam Deck
• ASUS ROG Ally
• Lenovo Legion Go
• Gaming Laptops
• Portable PCs
• Nintendo Systems

Because it is wired, there is no Bluetooth pairing procedure or wireless battery to manage.

No Battery Required

Unlike wireless earbuds, the Zero:2 requires:

• No Charging
• No Bluetooth Pairing
• No Battery Maintenance
• No Wireless Codec Configuration

Simply connect the appropriate cable to a compatible audio source and start listening.

This is particularly useful for long gaming sessions and travel.

Lightweight Alternative to a Gaming Headset

Traditional gaming headsets can become warm or heavy during extended use.

An IEM sits directly inside the ear and uses a much smaller form factor.

The Zero:2 is therefore a good option for gamers who prefer:

• Less Headband Pressure
• No Large Earcups
• Lightweight Equipment
• Compact Travel Storage
• Wired Low-Latency Audio

Blue Color Design

The Blue Zero:2 provides a distinctive appearance while retaining the same internal driver and tuning platform as the other Zero:2 colors.

Linsoul officially lists Blue alongside Silver, Orange, and Pink as available Zero:2 color options.

The Blue finish works especially well with:

• Blue Gaming Setups
• RGB Gaming Desks
• Handheld Gaming Devices
• Portable DACs
• Minimal Audio Setups
• Everyday Portable Listening

Zero:2 vs Original Salnotes Zero

The Zero:2 is an updated model rather than just a new color variation.

The most noticeable practical changes are the new driver, stronger bass, fuller lower midrange, and improved stock cable.

Perfect For

• Audiophile Beginners
• Budget IEM Buyers
• Music Lovers
• PC Gamers
• Competitive Gamers
• FPS Players
• Gaming Laptop Users
• Gaming Handheld Users
• Portable DAC Users
• Smartphone Listening
• Movies
• YouTube
• Streaming
• Everyday Listening
• Crinacle Fans
• Salnotes Zero Owners
• Wired Audio Enthusiasts
• Blue Gaming Setups

Why Choose the 7Hz x Crinacle Zero:2 – Blue?

• Tuned in collaboration with Crinacle.
• Updated 10mm dual-cavity dynamic driver.
• Advanced PU + metal composite diaphragm.
• Approximately 3dB more bass than the original Salnotes Zero.
• Improved bass impact and extension.
• Fuller and warmer low-mid presentation.
• Clean overall tonal balance.
• 10Hz–20kHz frequency response.
• 32Ω impedance.
• 108dB/V @ 1kHz sensitivity.
• <1% THD at 1kHz.
• Detachable 0.78mm 2-pin connection.
• Upgraded silver-plated oxygen-free copper cable.
• Multiple cable variants available.
• Multiple silicone ear-tip sizes.
• Passive noise isolation.
• No battery or charging required.
• No Bluetooth latency.
• Excellent for music.
• Excellent for gaming.
• Suitable for PCs and gaming handhelds.
• Attractive official Blue finish.
• Brand: 7Hz.
• Model: Zero:2 / Salnotes Zero 2.

Package Contents

Typical Zero:2 packaging includes:

• 1 × Pair of 7Hz x Crinacle Zero:2 IEMs – Blue
• 1 × Detachable 0.78mm 2-Pin Cable
• Multiple Silicone Ear Tips
• 1 × User Manual

Important: The Zero:2 is available in multiple connection configurations. 7Hz currently lists 3.5mm without microphone, 3.5mm with microphone, and USB Type-C with microphone versions. Make sure the selected ecommerce SKU matches the connection type physically supplied in your package.

Gaming Note: The standard 3.5mm no-microphone version provides audio only. Voice chat requires a separate microphone or compatible microphone-equipped cable. The Zero:2 uses a detachable 0.78mm 2-pin interface, making compatible replacement cables possible.

Compatibility Note: Devices without a suitable 3.5mm headphone output require an appropriate USB-C, Lightning, or other audio adapter/DAC depending on the device. The USB Type-C cable version is a separate manufacturer option and should not be assumed to be included with the standard 3.5mm model.