ONKYO tx-nr646 User Manual

Step 1:   Connections

Cut and remove the plastic coating from the end of the 

speaker cable, twist the core and connect it to the terminal. 

Be sure to make correct connection between the unit's 

jacks and speaker's jacks (+ to + and - to -) for each 

channel. If connection is wrong, a bass sound may become 

poor due to reverse phase. Up to two subwoofers with 

built-in power amplifier can be connected to the subwoofer 

jacks. Set the cut-off filter selection switch of the subwoofer 

to DIRECT. If the subwoofer does not have a cut-off filter 

selection switch but has a cut-off frequency adjusting dial, 

turn it to the maximum frequency. If your subwoofer does 

not have built-in power amplifier, you can connect a power 

amplifier between the unit and the subwoofer.

 

● The speaker setting is 7.1 channels at the time of 

purchase. You can change it manually or by using 

automatic speaker setting.

 

● Short-circuiting the + cable and - cable or contacting 

the cable core to the rear panel of the unit may cause 

failure. Also do not connect two or more cables to one 

speaker terminal or one speaker to several terminals.

When using commercially available banana plugs: 

tighten the speaker terminals to the end and then insert 

the banana plugs. Do not insert the core of speaker cable 

directly into the hole for banana plug of speaker terminal. 

(North American models)