Overview

Intime Acoustic is a Japanese audio brand owned by O2aid Co., Ltd. (O2aid), founded in 2016 in Takasaki, Japan. The brand was established by Yoshiyuki Watanabe and leverages long-standing expertise in piezoelectric materials to deliver high-quality sound at accessible prices. Manufacturing is based in China with final quality control performed in Japan.

Scientific Validity

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Manufacturer specifications list 20–40kHz ranges for SORA models and up to 50kHz for Miyabi, with 22Ω impedance and around 100–106dB sensitivity[1][3][6]. However, independent datasets for THD, SNR, IMD, and crosstalk remain limited. Third-party frequency-response data exist for selected models (e.g., Crinacle, Banbeu)[4][8], but coverage is incomplete. Following the unknown-measurement rule, we assign a provisional 0.5.

Technology Level

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Intime’s proprietary VST (Vertical Support Tweeter) integrates a ceramic super-tweeter with a 10mm dynamic driver in a coaxial, hybrid architecture. Iterative generations (e.g., VST2) and the use of licensed HDSS technology from TBI Audio Systems to manage internal acoustics reflect meaningful engineering effort.

Cost-Performance

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The SORA-2 retails at USD 79[6]. Without restricting by topology, we select the cheapest non-inferior comparator by features and measured performance: 7Hz x Crinacle Zero:2, which includes a detachable 0.78mm 2-pin cable and shows strong frequency-response linearity with low distortion in independent testing. Its official price is USD 24.99[5], and Audio Science Review provides detailed measurements corroborating its objective performance[9]. Frequency-response data for Intime SORA/SORA-2 are available for cross-checking[4][8].
CP = 24.99 ÷ 79 = 0.316 → 0.3 (rounded).

Reliability & Support

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As a relatively young, small operation, warranty handling is generally via the retailer with a warranty card and proof of purchase[7]. Distribution relies on regional dealers (e.g., LP Gear in the US; AccessoryJack in Hong Kong), and a centralized worldwide support scheme is limited. Production in China with final QC in Japan is a thoughtful setup; earlier brass-housing runs (e.g., initial Miyabi) raised long-term discoloration concerns, with later models moving to titanium housings, indicating ongoing quality iteration.

Rationality of Design Philosophy

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The design direction coherently targets extended treble and clean staging via VST and simple coaxial layouts, with HDSS mitigating internal acoustic issues. Still, the shortage of comprehensive third-party measurements tempers the score.

Advice

Intime suits listeners curious about hybrid ceramic tweeters and proprietary implementations. Before purchase, confirm local warranty handling (retailer) and compare price/performance against strong alternatives (e.g., hybrid or single-DD models) within your budget.

References

[1] O2aid – Company profile: https://o2aid.com/about/
[2] LP Gear – Intime category page: https://www.lpgear.com/category/intime.html
[3] AudioReviews – Intime Miyabi review: https://www.audioreviews.org/intime-miyabi-review-ap/
[4] Crinacle IEM Graph Database – Intime SORA: https://crinacle.com/graphs/iems/intime-sora/
[5] 7Hz x Crinacle Zero:2 official product page (USD 24.99): https://www.linsoul.com/products/7hz-x-crinacle-zero-2
[6] LP Gear – Intime SORA-2 product page (USD 79): https://www.lpgear.com/product/SORA-2.html
[7] Intime warranty policy (official blog): https://intimeacoustic.blog.fc2.com/blog-entry-114.html
[8] Banbeu IEM FR database – Intime Sora 2: https://banbeu.com/graph/iem/intime-sora-2/
[9] Audio Science Review – 7Hz x Crinacle Zero:2 measurements: https://www.audiosciencereview.com/forum/index.php?threads/7hz-x-crinacle-zero-2-iem-review.50534/

(2025.9.12)