2) 設置 4 Ohm 驅動
1. Press and hold the main unit's STATUS and ZONE3 SOURCE at the same
time for at least 3 seconds.
“Video Format < PAL>” appears on the display.
2. Use up or down curser on the main unit three times.
“Sp. Impedance <8ohms>” appears on the display.
3. Use left or right curser on the main unit to select the impedance.