CSPORT GM70PA 真空管後級擴大機，配備前蘇聯製 GM70 直熱三極真空管，獨特大型輸出變壓器、1,050V 高電壓、無回授設計，可輕鬆驅動低效率喇叭、重現完美音質。
配備德國電信開發之高可靠度 C3g 真空管，直接焊接於機板，有效減少接觸點的噪訊。
一般模式下可 bi-amp 驅動高頻和低頻；可切換成橋接模式，輸出可提高達 1.5 – 2 倍。
素面 & 波浪狀二款前面板可選。
Specification
| Model | GM70PA-G / GM70PA-C |
|---|---|
| Type | Class-A Vacuum tube stereo power amplifier |
| Output Power | ［Normal, DualMono］
・30 W+30 W(4 Ω, THD 5%) ・20 W+20 W(8 Ω, THD 5%) ［Bridge］ ・60 W(8 Ω, THD 5%) ・40 W(4 Ω, THD 5%) *The other than normal is valid for Lch/XLR input. |
| Frequency Response | 20-30 kHz -2 dB/10 W |
| THD | ［Normal, DualMono］
・0.7%/10 W ・0.2%/1 W ［Bridge］ ・0.5%/10 W ・0.1%/1 W |
| NFB | None |
| Signal to Noise Ratio | 90 dB/1 W(20-20 kHz) |
| Crosstalk | 40 dB/1 W(20-20 kHz) |
| Input Sensitivity | ［Normal, DualMono］
・1 V/30 W(4 Ω) ・1 V/20 W(8 Ω) ［Bridge］ ・1 V/60 W(8 Ω) ・1 V/40 W(4 Ω) |
| Gain | 21 dB |
| Input Terminal | Unbalanced x1, Balanced x1 |
| Input Impedance | 2.5 kΩ 1 kHz |
| Mode Switching | By the rear rotary switch |
| Volume Adjustment | None |
| Damping Factor | 2.8(4 Ω), 5.6(8 Ω) |
| Power Supply | AC100/120/200/240 V, 50/60 Hz |
| Power Consumption | 400 W |
| Dimensions | 470W×201H×430D mm * |
| Weight | 27 kg |
| Finishing | Anodic oxide coating |
| Accessories | AC cords |
| Warranty Period | 5 years(Excluding consumables) |
* Knobs and terminals are not included.
The input impedance of this unit is 2.5 kΩ. Please use a equipment with an output impedance of 500 Ω or less.
The standard model is equipped with the GM70 graphite plate. (Model: GM70PA-G). A model with a copper plate (Model: GM70PA-C) is available as an option.
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.
