Overview

The Daiso Hi-Res 7301 is an exceptionally affordable entry into the Hi-Res Audio realm, retailing for 4 USD at Daiso stores in Japan. It uses 10 mm dynamic drivers and claims a 20 Hz–40,000 Hz response. Crucially, the model is listed by the Japan Audio Society (JAS) as a Hi-Res AUDIO logo–certified product. The product page indicates an in-line remote with microphone, aluminum housings, and a 3.5 mm TRRS plug—covering basic day-to-day functionality at an ultra-budget price point. [1][2]

Scientific Validity

\[\Large \text{0.4}\]

Objective measurements are limited. According to the on-package specs reported by a third party: sensitivity 100 ± 3 dB/mW, impedance 18 Ω, 10 mm driver, and microphone specs (–42 ± 3 dB, 100 Hz–10 kHz). Frequency response is claimed at 20 Hz–40 kHz. These numbers suggest adequate driveability from portable devices but do not verify low distortion (THD/IMD) or linear frequency response. In the absence of standardized, independent lab data, our confidence relies mostly on catalog/packaging specs rather than verified acoustic performance, so we score below the default 0.5 starting point. [1][2][5]

Technology Level

\[\Large \text{0.3}\]

A conventional 10 mm single dynamic driver, basic cable, and simple aluminum shells put this firmly in entry-level tech territory. The Hi-Res certification indicates the product meets the JAS logo criteria (including extended bandwidth) but does not imply advanced transducer tech or state-of-the-art acoustics. [1]

Cost-Performance

\[\Large \text{1.0}\]

Using our standard method (comparing against the cheapest functionally equivalent product with equal or better performance we can identify): among widely available options, KZ ZSN Pro X (with mic) is a credible step-up in measured/subjective performance and remains very inexpensive at 21 USD direct from a mainstream retailer. That is still far above this Daiso’s ~4 USD street price, so the 7301 hits our maximum cost-performance. (Examples of step-up alternatives shown below for context.) [4][6]

• KZ ZSN Pro X (with mic) — 21 USD (detachable cable; widely measured to perform well for the price). [4][6]
• Moondrop Chu II — typically ~22.99 USD in the US (no in-line mic by default; strong measured FR for the class). [3][5]

Reliability & Support

\[\Large \text{0.4}\]

As an ultra-budget consumable, long-term durability and formal support are limited. Typical weak points at this price include strain reliefs, cable terminations, and driver housings.

Rationality of Design Philosophy

\[\Large \text{0.3}\]

The design prioritizes achieving Hi-Res logo eligibility at minimum cost rather than transparent sound. The published 20 Hz–40 kHz figure primarily meets logo requirements; audible improvements depend on linearity, distortion control, and quality control—areas where there’s little verified data for this model. [1]

Advice

If you specifically want a Hi-Res-logo-certified wired earphone for the lowest possible outlay, this is among the cheapest we could verify. If your priority is sound quality over certification, consider widely lauded budget IEMs such as KZ ZSN Pro X (with mic) around 21 USD or Moondrop Chu II around 22.99 USD; both have abundant third-party impressions/measurements indicating stronger acoustic performance for only a modest increase in price. [3][4][5][6]

References

1. Japan Audio Society — Status of Hi-Res AUDIO Logo (entry shows “Daiso イヤホン-7301”). https://www.jas-audio.or.jp/hi-res/definition/use-situation
2. Daiso Japan Online — マイク付ハイレゾ対応イヤホン（品番 4550480277301）. https://jp.daisonet.com/products/4550480277301
3. Amazon US — Moondrop CHU II (typical US price example). https://www.amazon.com/Moondrop-CHU-II-Performance-Interchangeable/dp/B0CB8HHS8V
4. Linsoul — KZ ZSN PRO X (Mic option selectable; price shown). https://www.linsoul.com/products/kz-zsn-pro-x
5. Pizaman — 100均ダイソーの「ハイレゾ対応有線イヤホン(7301)」は… (package specs excerpted). https://www.pizaman.com/entry/hi-res-earphones-7301/
6. SoundGuys — Moondrop Chu II review / KZ ZSN Pro X review (performance context). https://www.soundguys.com/moondrop-chu-ii-review-104977/ , https://www.soundguys.com/kz-zsn-pro-x-review-70016/

(2025.8.16)