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ADC ASTRION (Blue Box)

The ADC ASTRION (Blue Box) works as an induced magnet MI pickup and sits in the High End part of the brand lineup. Its 4.5 mV output drives any standard MM phono input directly, so no step up transformer is required. The replaceable stylus assembly is named RSA and carries a Fine Line diamond profile. Rated tracking force runs from 1.0 to 1.4 g with 1.2 g nominal.

Home Brand

Stylus: RSA
Type: МI
Stylus Shape: Fine Line[ radii (mil / µm) 0.25×1.5 mil (≈6.35×38.1 µm) ]
Class: High-End

Mounting: standard 1/2"
Weight & Dimensions (H×W×D): 5.7 g
Output Voltage: 4.5 mV
Frequency Response: 10–26 000 Hz
Channel Separation: 30 dB
Channel Balance: ≤ 1 dB
Recommended Load: 47 kΩ || 300 pF
Tracking Force: 1.0–1.4 g (nominal 1.2 g)
VTA: 30°
Cantilever: solid sapphire rod

Additional Info

The ADC Astrion, known as the Blue Box, is a refined, articulate MI design with Orbital-Pivot construction. Its Fine Line profile and strong tracking control deliver a clean, natural presentation where vocals sound remarkably true and imaging stays precise without being clinical. The sapphire cantilever adds a slightly relaxed, forgiving top end that flatters acoustic and vocal material. The replacement stylus carries the RSA designation, so wear stays manageable.

Sound × Setup

Detail

78%

IGD Control

72%

Noise Suppression

74%

Dynamics—Attack

75%

Soundstage/Imaging

76%

Bass Density

71%

Vocals/Midrange

77%

Forgiving Character

73%

Tonearm mass medium 46%

light 31%·heavy 23%

Capacitance 100-200 pF 60%

up to 100 pF 20%·from 200 pF 20%

Phono gain 35–38 dB 50%

39–42 dB 50%·43–46 dB 0%

ADC ASTRION (Blue Box) — картридж типа MI с сапфировым кантилевером и выходом 4.5 мВ. Оптимально подойдёт тонарм среднего класса массы (medium) — резонансная частота остаётся в норме при эффективной массе 8–18 г. Фонокорректор — с усилением 35–38 дБ (range_1) и входной ёмкостью около 47 кΩ || 300 пФ. Податливость не указана — оценка по типичному значению 15 µm/mN для MM (уверенность средняя).

Collectors

add 01/17/2026 · upd. 08/02/2026