Roseselsa Launches Ceramics Ultra TWS In-Ears

The Roseselsa Ceramics Ultra was officially launched today (18). It is the direct successor to the Ceramics X model, which features very similar characteristics. However, there have been not only updates to the chips used but also changes to the design of the Bluetooth TWS in-ear monitor (IEM) housing. Below, we examine what has changed in this new True Wireless IEM from Roseselsa, previously known as Rose or Rose Technics.

Successor to the Ceramics X is launched

Nearly two years after its release, the Ceramics X TWS has received a successor, the Ceramics Ultra. Fortunately, the new True Wireless model from Roseselsa does not introduce only incremental improvements. The most visible change is the shape of the in-ear Bluetooth housing, which brings improvements in fit and comfort.

Fit and comfort

Rather than maintaining the rounded design of the Ceramics X, the new “Ultra” model adopts a different form factor. Roseselsa’s designers aimed to develop contours that follow the natural shape of the ear.

Note that the TWS covers both the cavum and the cymba, which together form the concha.

According to the manufacturer, dozens of prototypes were created with the aid of 3D printing to minimize potential discomfort in the user’s ears. This effort not only enhances comfort but also improves the efficiency and effectiveness of active noise cancellation (ANC).

Active noise cancellation (ANC)

To improve the efficiency of active noise cancellation (ANC), the Ceramics Ultra utilizes DSP (Digital Signal Processing) implemented by Roseselsa. The company refers to its proprietary algorithm as DSNC (Wideband DeepSea Noise Cancellation).

The DSNC system has three primary objectives:

• Broaden the effective frequency range of ANC
• Reduce the sensation of pressure caused by active noise cancellation
• Optimize the detection of more complex noise sources (such as voices, wind, and sudden sounds)

Active noise cancellation above 4 kHz is claimed for both the Ceramics X and the Ceramics Ultra. Although such performance is difficult to verify given the limitations of ANC technology, access to this type of implementation would be noteworthy.

For ANC to function, the microphones in the TWS in-ears must capture ambient sounds, process them, and generate an inverted waveform to achieve noise reduction. Although the company states that it has optimized detection for complex noises such as voices and sudden sounds, it remains difficult to fully cancel these types of signals.

Regarding the sensation of pressure caused by active noise cancellation, this is a common issue reported by many users. In this context, it is encouraging to see Roseselsa attempting to mitigate this effect.

Environmental noise cancellation (ENC) for calls

The Ceramics Ultra employs four Goertek MEMS microphones and a Cadence Tensilica HiFi 5 SoC (System on Chip) dedicated to processing both ANC and ENC. According to Roseselsa, neural network-based algorithms enable noise reduction during calls while increasing voice volume by 20%.

Protection against sweat, water, and dust

For unclear reasons, the protection rating has been reduced from IPX5, present in the Ceramics X, to IPX4 in the Ceramics Ultra.

An IPX5 rating provides protection against low-pressure water jets, whereas IPX4 certifies resistance to splashes of liquids, including sweat.

Battery life

The Ceramics Ultra battery is capable of delivering up to 12 hours of continuous playback on a single charge. The charging case provides an additional 33 hours of operation for the TWS in-ears.

App for adjustments

To configure the Ceramics Ultra, the Roseselsa-developed app does not require users to create an account or log in. Additionally, the application is free of advertisements and is available for both iOS and Android devices.

Roseselsa Ceramics Ultra: Specifications

• ANC capable of attenuating noise by up to 50 dB
• Battery life per charge: 12 hours
• Bluetooth 6.0
• Driver: dynamic driver (DD) with a 10 mm diaphragm
• Mobile app for adjustments on Android and iOS smartphones
• Protection rating: IPX4 (splash resistance)
• Signal range: up to 10 meters
• Supported Bluetooth audio codecs: SBC, AAC, LDAC, and LHDC 5.0
• Supports gaming mode
• Supports simultaneous connection to two devices
• Weight: 6 g

Launch, price, and availability

The Roseselsa Ceramics Ultra is already available for purchase in the colors Night (black), Greige (a mix of green and beige), and Dove Gray (a mix of gray and blue) for US$49.99 on Roseselsa’s official online store.

About Roseselsa

Founded in 2015, ROSESELSA (formerly known as “Rose” or “Rose Technics”) is an audio equipment manufacturer that has been gaining recognition within the audiophile community.