Key facts
- Brand
- Onkyo
- Model
- TX-NR646
- Industry
- Electronics
- Documents
- 2
- Languages
- EN · ZH
- Last added
- 2026-11-02
Start here
Onkyo TX-NR646 AV Receiver Basic Manual
This manual provides step-by-step instructions for initial setup and frequently used operations of the Onkyo TX-NR646 AV receiver. It covers connecting speakers, linking TV and audio players, and configuring basic settings. For advanced features and detailed settings, users are directed to the online Advanced Manual. The guide also explains front and rear panel controls, display indicators, and multi-zone functionality for separate room audio playback.
Read onlineOnkyo TX-NR646 specifications
| Amplifier Channels | 7 ch |
|---|---|
| HDMI Compatibility | 4K |
| HDMI Outputs | 2 |
| HDCP Version | HDCP2.2 |
| Network Functions | Internet Radio, DLNA, AirPlay |
| Wireless Connectivity | Wi-Fi and Bluetooth® |
| PHONO Jack | Yes |
| DSP | 32 bit |
| Speaker Setup | AccuEQ Room Calibration |
All Onkyo TX-NR646 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
Can I use the TX-NR646 with a turntable?
Yes, connect your turntable using the PHONO jack on the rear panel.
What is AccuEQ Room Calibration?
It’s an automatic speaker setup using a supplied calibrated microphone to optimize sound based on room acoustics.
How many HDMI output ports does the TX‑NR646 have?
It provides two HDMI output ports.
What speaker impedance range can be used with the TX‑NR646?
The receiver supports speakers with an impedance of 4 Ω to 16 Ω (6 Ω‑16 Ω recommended).