Astrotec GX100 VS Tin Hifi C3 MK2

The Astrotec GX100 is an entry-level hybrid IEM using a 10mm LCP dynamic driver plus a 10.6mm PZT piezo driver in a compact metal shell, targeting a Harman-inspired balance at an MSRP of around $49.90. It aims for a neutral-bright, clarity-focused presentation with relatively lean bass and elevated upper frequencies rather than a warm or bass-heavy profile, as reflected in multiple subjective impressions and store descriptions.

In practice, the GX100 offers good perceived detail and air for its price, with clear mids and crisp treble that benefit acoustic, vocal and lighter genres, supported by generally coherent integration of the PZT driver. However, the low-end is described as light in slam and sub-bass weight, and the energetic upper range can introduce fatigue or sharpness on brighter recordings, making tip selection and source pairing important to avoid overemphasis.

Technically, the GX100 delivers solid separation and micro-detail for a budget set, but its intimate stage, only moderate macrodynamics, and occasionally peaky treble position it as a niche choice rather than a class-leading all-rounder in the sub-$50 bracket. Considering the tuning compromises and strong competition at similar or lower prices, an overall evaluation should recognize its strengths in treble detail and hybrid implementation without overstating its value. This justifies a score that is competent for its segment but clearly below premium and upper-midrange benchmarks.

The Tin HiFi C3 MKII (often styled “C3 MK2”) is a budget single-dynamic IEM built around a 10 mm LCP diaphragm with a dual-magnetic circuit, housed in lightweight resin shells. Tin HiFi lists a 10–40 kHz response and ≤0.5% THD, and multiple retailers carry it at an MSRP around $49—squarely in entry-level territory (, ). :contentReference[oaicite:0]{index=0}

Across independent reviews, the C3 MKII’s tonality is described as balanced/neutral with a gentle bass lift and a smooth, non-fatiguing treble; frequency-response measurements corroborate a Harman-leaning slope with restrained upper-treble energy (, , ). The trade-offs are typical for its class: soundstage size and ultimate treble air are modest, while detail retrieval is competent rather than class-defining. :contentReference[oaicite:1]{index=1}

Build quality and comfort are consistently praised, and the set is easy to drive, making it a sensible daily-carry option for casual and portable use (, ). Within strict price-tier scoring, its well-judged tuning earns a strong budget recommendation, but absolute technical performance remains bounded by its single-DD architecture and price. :contentReference[oaicite:2]{index=2}