The Technics SU-X880 Integrated Hi-Fi Amplifier is a classic amplifier unit. Below are the typical technical specifications for this type of amplifier:

1. **Power Output:** The power output of the amplifier may vary, but it typically ranges from 50 watts per channel to 100 watts per channel into 8 ohms.

2. **Frequency Response:** Usually covers the audible frequency range from 20 Hz to 20 kHz or wider, ensuring faithful reproduction of audio signals.

3. **Total Harmonic Distortion (THD):** Typically kept below 0.1% at rated power, ensuring clean and accurate sound reproduction.

4. **Signal-to-Noise Ratio (SNR):** Typically greater than 80 dB, indicating high fidelity and low background noise.

5. **Input Sensitivity/Impedance:** Varies depending on the input type (e.g., Phono, CD, Tuner), typically between 150 mV to 200 mV.

6. **Tone Controls:** Bass and treble controls for adjusting audio frequencies to suit personal preferences.

7. **Input/Output Connectivity:**    - Inputs: May include multiple audio inputs such as AUX, Phono, CD, Tuner, etc.   - Outputs: May include preamp outputs for connecting to external power amplifiers, as well as tape loop connections.

8. **Power Requirements:** Typically operates on standard household voltage (e.g., 110-120V AC).

9. **Dimensions:** The dimensions of the amplifier vary depending on the specific model but are typically standard for vintage integrated amplifiers.

10. **Weight:** The weight of the amplifier varies depending on the construction and materials used but is generally solid and robust.

Additional Information:- **Condition:** Sold as "spares or repairs" and powers on, but there is no sound, indicating potential issues with internal components such as the amplifier circuitry, volume controls, or other electronic components.- **Vintage Design:** Reflects the design aesthetics and technology of its era, appealing to collectors and enthusiasts of vintage audio equipment.- **Repair Consideration:** Requires troubleshooting and repair by someone with electronic repair skills to address the issues.

Overall, the Technics SU-X880 Integrated Hi-Fi Amplifier represents a classic amplifier unit with typical specifications for its era. However, potential buyers should be aware of the need for repairs or restoration due to the described issues.