Overview

The HIDIZS MS1-Galaxy is a single dynamic driver in-ear monitor released in September 2023, representing the most affordable model in HIDIZS’s MS1 product line. HIDIZS, a Shenzhen-based audio company founded in 2009, positions this product as delivering “Hi-Fi level materials and technology to a wider audience” at a budget price. The earphone uses a 10.2mm dual magnetic circuit dynamic driver with a PU+PEEK composite polymer diaphragm, tuned toward the Harman IE 2019 psychoacoustic reference target. It operates as a fully passive, wired 3.5mm analog IEM with no onboard electronics, available with or without an inline microphone via a detachable 0.78mm 2-pin cable.

Scientific Validity

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Manufacturer specifications state a frequency response of 20Hz–40kHz, THD ≤0.05% across the full frequency range, and passive noise isolation of 12 dB with silicone ear tips [1]. Bedrock Reviews’ Squiglink page provides left/right frequency-response traces and a delta view against its 5128 DF 10dB target, but it does not publish a Harman IE 2019 numeric deviation score, calibrated distortion data, or isolation measurements [3]. The manufacturer’s THD claim of ≤0.05% has not been independently verified by any calibrated laboratory, requiring conservative treatment. Passive isolation of 12 dB (manufacturer claim) marginally exceeds the lower bound for in-ear monitors. The combination of unconfirmed Harman-target FR compliance, unverified distortion performance, and marginal passive isolation yields a midpoint score.

Technology Level

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The MS1-Galaxy applies industry-standard passive IEM components and methods that were already broadly commercialized before its September 2023 release: a dynamic driver, polymer-composite diaphragm, detachable 0.78mm 2-pin cable, and Harman IE 2019 target-oriented tuning [1]. No proprietary patents have been identified. No public evidence of fully in-house driver design has been found, and no public material identifies unique technical know-how that competitors could not readily replicate. The product is entirely passive and analog with no digital signal processing, software integration, or connectivity of any kind. Several marketed features — “German Makrolon resin,” silver-plated OFC cable, Hi-Res Audio certification — carry no demonstrated measured-performance advantage over standard alternatives.

Cost-Performance

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This evaluation is based solely on functionality and measured performance values, without considering driver types or configurations.

The MS1-GALAXY is priced at 25.99 USD [1]. The 7Hz Salnotes Zero, available at 20.99 USD [4], is identified as the cheapest equivalent-or-better comparator. Both products provide a 3.5mm SE analog output and are offered in a with-mic variant with a detachable cable.

Independent measurements from Audio Science Review confirm for the 7Hz Salnotes Zero: FR deviation of 1.31 dB STD from the Harman IE 2019 v2 target and low distortion apart from a still-low resonance around 1 kHz [2]. For the MS1-GALAXY, the available Bedrock Reviews Squiglink page provides FR traces and a delta view against its 5128 DF 10dB target, but no Harman IE 2019 numeric deviation score, distortion data, or isolation data [3], making direct measured comparison provisional. The MS1-GALAXY’s THD specification of ≤0.05% is manufacturer-only data with no independent numeric verification [1]; the 7Hz Salnotes Zero’s independently measured low distortion is provisionally equivalent to or better than this unverified claim [2]. Passive isolation comparison is provisional as neither product has confirmed independent isolation measurements. All comparisons are provisional because the MS1-GALAXY lacks independent numeric measurements.

CP = 20.99 USD ÷ 25.99 USD = 0.8076 → 0.8

Reliability & Support

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The MS1-Galaxy’s fully passive design — no battery, no active electronics, no firmware — is inherently resistant to the degradation and failure modes that affect active devices. The detachable 0.78mm 2-pin cable eliminates cable fatigue at a fixed junction, the most common IEM failure mode, and replacement cables in this standard are widely available. HIDIZS provides global manufacturer direct support through its official website. No documented failures, recalls, or service bulletins have been identified as of the review date. However, the official warranty period is 6–12 months [5], an at-or-below-average duration that applies a negative adjustment to an otherwise solid reliability profile.

Rationality of Design Philosophy

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The MS1-Galaxy adopts the Harman IE 2019 psychoacoustic target as its tuning reference, a scientifically grounded methodology based on listener preference research. The MS1-Galaxy also represents the cheapest iteration of the MS1 product line, with Harman-aligned tuning improved relative to its predecessor — a genuine active cost-reduction trajectory that reflects rational function-per-cost prioritization. However, the product’s marketing asserts audible benefit for elements with no demonstrated perceptual effect: the silver-plated OFC cable is presented as sonically meaningful without substantiating evidence, “German Makrolon resin” implies acoustic benefit from a standard commercial-grade polycarbonate, and the Hi-Res Audio certification is framed as a sound quality credential when it designates only a 40kHz frequency extension. These inaudible claims offset the legitimate scientific elements of the design approach, yielding a neutral score.

Advice

The HIDIZS MS1-GALAXY is a fully passive wired IEM at 25.99 USD with a Harman IE 2019 target-aligned tuning approach and a simple passive construction. Its official THD and isolation figures remain unverified by independent numeric measurements, so it should be considered a basic wired IEM rather than a measurement-confirmed high-fidelity option.

The 7Hz Salnotes Zero at 20.99 USD [4] presents a more complete measured performance profile: independently verified FR deviation of 1.31 dB STD from the Harman IE 2019 v2 target [2] and independently confirmed low distortion [2], while the MS1-GALAXY has no independently published Harman IE 2019 numeric FR deviation or distortion measurement [3]. At a lower price and with better-verified measured performance, the 7Hz Salnotes Zero is the recommended alternative for purchasers prioritizing confirmed acoustic measurement results.

References

[1] HIDIZS - MS1-Galaxy Official Product Page - https://www.hidizs.net/products/hidizs-ms1-galaxy-dynamic-driver-in-ear-monitors - accessed 2026-06-04

[2] Audio Science Review - 7Hz Salnotes Zero IEM Review - https://www.audiosciencereview.com/forum/index.php?threads/7hz-salnotes-zero-iem-review.50226/ - accessed 2026-06-04; ASR standard measurement fixture; purchased unit

[3] Bedrock Reviews - Hidizs MS1 Galaxy Squiglink frequency-response graph and 5128 DF 10dB target delta view - https://bedrock.squig.link/?share=%CE%94_5128_DF_10dB_Target,Hidizs_MS1_Galaxy - accessed 2026-06-07; no published Harman IE 2019 numeric deviation score, distortion, or isolation data

[4] Amazon US - Linsoul 7Hz Salnotes Zero IEM - https://www.amazon.com/Linsoul-7Hz-Zero-Composite-Detachable/dp/B0B76S5Z8B - accessed 2026-06-04

[5] HIDIZS - Warranty - https://www.hidizs.net/pages/warranty - accessed 2026-06-04

(2026.6.7)