Specifications
Specifications common to STA15 and 25
| Weight | Approx 17Kg |
| Size (WxDxH) | 36x25x22cm |
| AC frequency | 50-60hz |
| Impedance settings | 4Ω, 8Ω, 16Ω |
| Speaker connection | Standard 4mm binding posts |
| Rise time | 5μS |
| Input sensitivity | 500mV |
| input impedance | 100kΩ |
| Output impedance (8Ω configuration selected) | Approx 0.3Ω |
| Supplied valves | JJ GZ34, JJ E34L, Phillips Mil Spec 6U8 / ECF82, Winged-C Russian EF86 / 6J32P |
STA15 Specifications
| Power (1% THD) | 20W |
| Power (0.1% THD) | 15W |
| Bandwidth (-1dB): | |
| 1W | 20Hz – 60Khz |
| 15W | 20Hz – 40Khz |
| 20W | 25Hz – 25Khz |
STA25 Specifications
| Power (1% THD) | 36W |
| Power (0.1% THD) | 25W |
| Bandwidth (-1dB): | |
| 1W | 20Hz – 60Khz |
| 25W | 20Hz – 40Khz |
| 36W | 25Hz – 25Khz |