AIYIMA T9 PRO HiFi Bluetooth Tube Amplifierbr Link: br br br br br The **AIYIMA T9 PRO** is a compact **HiFi Bluetooth tube amplifier** that combines **vacuum tube preamplification** with a **Class D power amplifier** for a warm, analog sound with modern convenience. Here's a detailed breakdown of its features:br br ### **Key Features:**br 1. **Hybrid Design** br - **Vacuum Tube Preamp**: Uses a **6K46J1 tube** (or compatible) for warm, smooth sound. br - **Class D Power Amp**: Efficient **TPA3255 chip** (or similar) for clean, powerful output. br br 2. **Bluetooth 5.0** br - Supports **AAC, SBC** codecs for wireless streaming. br - Stable connection with smartphones, tablets, and PCs. br br 3. **Connectivity Options** br - **Analog Inputs**: RCA (for CD players, DACs, turntables with phono preamp). br - **Digital Input**: Optical (TOSLINK) for higher-quality audio. br - **USB DAC** (if supported, check specs). br - **Headphone Output** (3.5mm or 6.35mm, depending on model). br br 4. **Power & Output** br - **Output Power**: ~50W x 2 (4Ω) or ~30W x 2 (8Ω).