Kenwood KAC-746 User Manual - Page 9

Troubleshooting guide Often, what appears to be a malfunction is due to user error. Before calling for service, please consult the following table. Symptom No sound. (No sound from one side.) Cause • Input (or output) cables are disconnected. • Protection circuit may be activated. • The fuse may be blown because the volume was too high. Remedy • Connect the input (or output) cables. • Check connections by referring to "Protection function". • Replace the fuse with a new fuse and use a lower volume. The output level is too small (or too large). The input sensitivity adjusting control is not set to the correct position. Adjust the control correctly referring to "Controls". The sound quality is bad. (The sound is distorted.) • The speakers cable are connected with wrong + / polarity. • A speaker cable is pinched by a screw in the car body. • The switches may be set improperly. • Connect them properly checking the + / - of the terminals and cables well. • Connect the speaker cable again so that it is not pinched by anything. • Set switches properly by referring to "Controls" and "System examples". Specifications Specifications subject to change without notice. Audio Section Max Power Output (4 Ω) 4 Channel Mode ...70 W × 4 3 Channel Mode 70 W × 2 + 200 W × 1 2 Channel Mode ...200 W × 2 Rated Power Output (4 Ω) 4 Channel Mode 35 W × 4 (DIN45324, +B=14.4 V) 3 Channel Mode 35 W × 2 (1 kHz, 0.08 % THD) + 100 W × 1 (1 kHz, 0.8 % THD 2 Channel Mode 100 W × 2 (1 kHz, 0.8 % THD) Rated Power Output (2 Ω) 4 Channel Mode 50 W × 4 (1 kHz, 0.8 % THD) Frequency Response (+0, -1 dB 5 Hz ~ 50 kHz Signal to Noise Ratio...100 dB Sensitivity (MAX) (rated output 0.15 V Sensitivity (MIN) (rated output 4.0 V Input Impedance...10 kΩ Low Pass Filter (12 dB/oct.) (Variable 50 ~ 200 Hz High Pass Filter (12 dB/oct.) (Variable 50 ~ 200 Hz General Operating Voltage 14.4 V (11 ~ 16 V allowable) Current Consumption (1 kHz, 10% THD 28 A Dimensions (W × H × D 290 × 52 × 230 mm Weight ...3.1 kg 9