7
En
Troubleshooting
■ The unit does not turn on
■ No sound is output
■ Low sound output
■ Hum noise
Specifications
Specifications and appearance are subject to change 
without prior notice.
The power plug is not fully inserted.
➔Insert the power plug fully into the power outlet.
The OUTPUT LEVEL knob is set to the MIN level.
➔Set the OUTPUT LEVEL knob properly.
Pin connector cable is not properly connected to the 
LINE INPUT jack.
The speaker setting at the amplifier (or receiver) is 
incorrect.
➔Check the settings at the amplifier (or receiver).
The input signal is so small that the unit entered 
Standby mode.
➔Slightly increase the output level at the amplifier 
(or receiver). 
If the Standby/On indicator lights up (both red and 
blue LEDs) several seconds or minutes after the 
sound output stopped, this means that the amp 
protection circuit has been activated. In this case, set 
the OUTPUT LEVEL knob to the center position, 
and disconnect the power cord from the AC outlet. 
Wait at least 10 seconds, and then reconnect the 
power cord. If that doesn’t solve the issue, contact 
your Onkyo dealer.
The sound source might not include a superbass 
range.
➔Play a sound source that includes a superbass 
range.
Pin connector plug is not inserted completely.
➔Fully insert the pin connector plug.
External leakage flux (induction noise by TV, etc.) 
occurs.
➔Relocate the SKW-770 away from the noise 
source and re-connect.
Type Bass-Reflex
Input sensitivity/impedance
550 mV/20 kΩ
Frequency response 25 Hz to 150 Hz
Rated output power (IEC)
120 watts minimum continuos power, 
4 ohms, driven at 100 Hz with a maximum 
total harmonic distortion of 1 %
Cabinet capacity 37 L
Drivers unit 25 cm Cone woofer
Power supply AC 220 - 240 V, 50/60 Hz
Power consumption 137 W
Dimensions (W × H × D)
275 mm × 507 mm × 411 mm
(incl. grille and projection)
Weight 11.6 kg
Accessory Power cord (2 pcs.)
Pin connector cable (1 pc.)
Instruction manual (this manual)
Floor pad (4 pcs.)
Others Auto Standby function
Non-magnetic shielding