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DD ddHiFi E2023 Janus3 In-Ear Monitors



Product SKU: E2023-Janus3


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Product Details

↓ Details provided by DD ddHiFi

DD ddHiFi E2023 Janus3 

The 3.5mm headphone jack was introduced back in the 19th century, Apple released a new 8-pin charging interface named Lightning in 2012, and the first batch of USB Type-C connector devices hit the market in 2014. However, USB Type-C and Lightning do not support analog signal audio output. Balanced signal transmission was first used with a 2.5mm connector, and until 2016, the first commercialized 4.4mm balanced terminal was introduced by Pentaconn and JEITA. The E2023 is the third generation of Janus (Janus3 for short), which provides an earphone cable with 3.5mm and 4.4mm interchangeable plugs in the package. USB Type-C M120B cable is available to purchase separately.

DD ddHiFi  E2023 Janus3 In-Ear Monitors Overview

Ensure acoustic stability as well as comfortable fit

The front cavity of the Janus3 is sealed and fixed with the driver unit. The driver unit, which sports a dedicated rear cavity, mainly relies on the space and structure of the front cavity for tuning. The CNC aluminum alloy unibody molding process allows precise machining dimensions down to 0.03mm, ensuring high consistency in the frequency response curve for each pair of Janus3 earphones. The rear cavity's structural space is used to connect the speaker vent and the earphone socket. The high-strength polycarbonate material is used as the rear cavity, which greatly reduces the weight compared with metal, ensuring that the earphones' centre of gravity is inward facing.

DD ddHiFi  E2023 Janus3 In-Ear Monitors Acoustic Stability

Straight-down wearing

Straight-down wearing is the most common way to use. Select suitable ear tips according to the size of the ear canal, to secure comfortable fit as well as certain sound insulation. The Janus3 is designed with a curved hook angle, when wearing straight-down, the silicone ear tips will have a downward force at the position of the tragus
and the external auditory canal, without going too deep into the ear canal, so as to make the wearing more comfortable.
Note: The silicone model picture of the human ear is only used as a reference for better understanding the text.

DD ddHiFi  E2023 Janus3 In-Ear Monitors Straight Down Wearing

Over-the-ear wearing

Over-the-ear wearing provides better stability and is generally used during sports activities. The angle of the curved hook will thus probe fully into the external auditory canal, which provides better sound isolation and a more powerful bass experience.
Note: The silicone model picture of the human ear is only used as a reference for better understanding the text.

DD ddHiFi  E2023 Janus3 In-Ear Monitors Over-The-Ear Wearing

Lithium-magnesium alloy dome composite diaphragm dynamic driver

The diaphragm of a driver unit is the key to sound performance, and the dome material is the key core. Both lithium and magnesium have lower density than beryllium's 1.85 g/cm3, so using lithium magnesium alloy as the diaphragm dome alloy material provides both high rigidity and light weight. Lithium-magnesium alloy also has a very impressive damping coefficient, using it as diaphragm dome can not only dramatically increase the bandwidth and playback more details, but also effectively suppress excess resonance, so that the high frequencies are presented in a more natural way.

DD ddHiFi  E2023 Janus3 In-Ear Monitors Driver

Provided with ddHiFi ST35 ear tips

The ST35 ear tips are made of medical silicone, which are soft and safe to use.

DD ddHiFi  E2023 Janus3 In-Ear Monitors Eartips

In the Box

  • One pair of E2023 earbud units
  • An earphone cable (with 3.5 mm and 4.4 mm interchangeable plug)
  • One pair each of S, M and L ear tips 4. A storage bag

DD ddHiFi  E2023 Janus3 In-Ear Monitors Accessories


  • Model: E2023 (Janus3)
  • Driver: 10mm ultra-low distortion dynamic unit with lithium magnesium alloy dome composite
  • Frequency Response Range: 5Hz-58kHz
  • Effective Frequency Response Range: 20Hz-20kHz
  • Sensitivity: 122dB/Vrms (@1kHz)
  • Impedance: 14 ohms ± 15% (@1kHz)
  • Interchangeable Cable Design: MMCX connector, with 3.5mm + 4.4mm interchangeable plugs
  • Cable Material: Single Crystal Copper Core Shielded Cable
  • Cable Length: 1.2 meters
  • Weight: Approx 5.5g (excluding cable)
  • Color: Green + Silver

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