CSPort Monaural Power Amplifier 212PAM2 真空管單聲道後級擴大機，採用德國電信開發之高可靠度 C3g 真空管，及 Western Electric 於 1910 年代開發的大型三極真空管212SE，1400V 電壓、50W 輸出功率，足以應付一般低效率喇叭。
無回授技術、高保真輸入變壓器、電源調節管控、平衡輸入等設計，在抑制失真、提升整體和諧、機體耐用度上，皆有非凡表現，實現 CSPort 致力追求的高音質境界。
Specification
Model：212PAM2-ST / 212PAM2-JH
Type：Class-A Vacuum tube monaural power amplifier
Output Power：50 W (4 Ω, 8 Ω)
Frequency Response：20-40k Hz -3 dB/20 W
THD：5%/50 W 1k Hz 0.6%/10 W 1k Hz
NFB：None
Signal to Noise Ratio：90 dB/10 W (8 Ω)
Input Sensitivity：1 .2V/50 W
Gain：25 dB (8 Ω)
Input Terminal：Balanced x1 Unbalanced x1
Input Impedance：1.5k Ω
Volume Adjustment：None
Dumping Factor：5 or more
Power Supply：AC100/120/200/240 V, 50/60 Hz
Power Consumption：400 W
Dimensions (WxHxD)：188×370×563 mm
Weight：24.5 kg
Finishing：Anodised aluminium, Rosewood plates
Accessories：AC cords
Warranty Period：5 years
○ The input impedance of this unit is 1.5k Ω. Please use a equipment with an output impedance of 300 Ω or less.
○ Two models are available: STC 4212E (model: 212PAM2-ST) and Jinzhou Electronics 212E (model: 212PAM2-JH).
○ The 4212E manufactured by STC is a rare item, so please contact us for availability.
○ Do not touch the vacuum tube as it is hot and may cause burns.
○ Vacuum tubes are treated as consumables and are not covered by warranty.
○ Dimensions do not include legs, knobs, or terminals.
○ The descriptions are current as of January 2025.
○ The appearance and specifications are subject to change without notice.
○ Actual colors may differ from those in the photographs due to shooting, lighting, etc.
