•This unit is equipped with a protective function to prevent malfunction of the unit itself and speakers from too much output, improper use or improper connection.
•When outputting sound at high volume etc., this function will cut off the sound output in a few seconds. But this is not a malfunction. When you turn down the volume of the head unit the sound output will be restored.
•If sound output is cut, the gain control of this unit may be improperly set. To ensure continuous sound output at increased volume of the head unit, set the gain control of the amplifier to a proper position according to the preout maximum output level of the head unit (Fig. 1). There is no need to decrease the volume of the head unit and too much output is controlled (Fig. 2, Fig. 3).
•If you decrease the volume of the head unit and set the gain control of the amplifier to the proper position but still the sound cuts out from time to time, contact the nearest authorized PIONEER Service Station.
Preout level: 6.5 V | Preout level: 4 V |
Preout level: 2 V
Fig. 1 Gain control of this unit
Power | Power |
Normal gain | Maximum gain |
| Equal power |
Head unit volume steps | Head unit volume steps |
Amplifier gain | Amplifier gain |
(normal) | (maximum) |
If you raise the gain of the amplifier to an improper level, only distortion is increased and the power increases only slightly.
Fig. 2 Relationship between the gain of the amplifier and the output power of the head unit
Normal gain | Maximum gain |
| Equal power |
Signal | Signal |
waveform | waveform |
Amplifier gain | Amplifier gain |
(normal) | (maximum) |
With high output the signal waveform is distorted, if you raise the gain of the amplifier the power changes only slightly.
Fig. 3 Signal waveform when outputting at high volume by the gain control of the amplifier
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