Radio Design Labs RDL STA-1M Audio Line Amplifier - Mono: -14 to 14 dB Gain MSRP: $212.83 MAP: $159.62
Radio Design Labs RDL SF-PA50AX 50 W Mono Audio Amplifier - 70 V or 100 V - Export Model - Excludes Power Cord MSRP: $531.11 MAP: $398.34