TX-NR646

Experience the cutting edge of home theater with the 7.2-channel TX-NR646 Network A/V Receiver, the first in its class to feature the revolutionary DTS:X™ and Dolby Atmos® multi-dimensional audio formats. Onkyo’s high-current amplification system drives your speakers to reproduce soundtracks with maximum impact and fidelity at 170 W/Ch. UltraHD video capability is equally impressive, with eight latest spec HDMI® terminals including dedicated HDCP 2.2 compatible inputs for premium 4K video content and two HDMI outputs for video in separate rooms. The TX-NR646’s high-grade 384 kHz/32-bit AKM DAC not only brings movies to life, but your Hi-Res and streamed music as well. Conveniently stream music over built-in Wi-Fi®, Bluetooth, AirPlay, or internet music services including Spotify Connect and Pandora. Use the free Onkyo Remote app to stream audio stored on your mobile device, browse and select tracks from online services, and control playback in two zones. Plus, for fans of vinyl, the TX-NR646 has a phono equalizer input to connect a turntable.

Amplifier Section
Power Output
All Channels 170 W/Ch (6 Ohms, 1 kHz, 0.9% THD,
1 Channel Driven, FTC)
100 W/Ch (8 Ohms, 20 Hz–20 kHz, 0.08%
THD, 2 Channels Driven, FTC)
Dynamic Power 240 W (3 Ohms, Front)
210 W (4 Ohms, Front)
120 W (8 Ohms, Front)
THD+N (Total Harmonic Distortion + Noise)
 0.08% (20 Hz–20 kHz, Half Power)
Damping Factor 60 (Front, 1 kHz, 8 Ohms)
Input Sensitivity and Impedance
200 mV/47 k-ohms (Line)
3.5 mV/47 k-ohms (Phono MM)
Rated RCA Output Level and Impedance
 100 mV/2.2 k-ohms (Zone 2 Line Out)
200 mV/470 Ohms (Subwoofer Pre Out)
Maximum RCA Output Level and Impedance
1.0V/2.2 k-ohms (Zone 2 Line Out)
200m V/470 Ohms (Subwoofer Pre Out)
Phono Overload 70 mV (MM, 1 kHz, 0.5%)
Frequency Response 10 Hz–100 kHz/+1 dB, -3 dB (Direct Mode)
Tone Control ±10 dB, 20 Hz (Bass)
±10 dB, 20 kHz (Treble)
Signal-to-Noise Ratio 100 dB (Line, IHF-A)
80 dB (Phono MM, IHF-A)
Speaker Impedance 6 Ohms–16 Ohms
Video Section
Input Sensitivity/Output Level and Impedance
Video 1.0 Vp–p/75 Ohms (Component Y)
 0.7 Vp–p/75 Ohms (Component PB/CB, PR/CR)
1.0 Vp–p/75 Ohms (Composite)
Component Video Frequency Response
5 Hz–13.5 MHz/+0 dB, -3 dB
Tuner Section
Tuning Frequency Range
FM 87.5 MHz–107.9 MHz
AM 530 kHz–1,710 kHz
FM/AM Preset Memory 40 Stations
General
Power Supply AC 120 V~, 60 Hz
Power Consumption 6.4 A
No-Sound Power Consumption
70 W
Standby Power Consumption
0.1 W
Dimensions (W x H x D) 17 1/8˝ x 6 13/16˝ x 12 15/16˝
(435 x 173.5 x 329 mm)
Weight 20.7 lbs. (9.4 kg)