7. GAIN
This regulator (7) equalizes the sensitivity of the amplifier to match the radio-output
voltage. This regulator is not for volume adjustment! Use clear music and increase
the radio volume up to 75 %. Now turn the amplifier gain-regulator to the right until
the sound becomes unclear.
8. LOW PASS
Unwanted higher frequencies will be filtered with 12 db and the bass speaker will only
produce low frequencies and will sound clearer.
9. Subsonic frequency
This control (9) adjust the filter frequency below which the subsonic decreases
the volume. We suggest to set it at the lowest audible frequency of the speaker.
10.
11. Bassboost
This control (11) can increase the volume from 0 to 12 dB wich you adjusted with
the control 10. Please be careful with the increase level not to damage your
speaker.
PROTECTION-LED
This LED lights up in case of any malfunction or internal damages. It also shows
if the amplifier is over-heat or low voltage protection is activated.
13. POWER-LED
The LED lights when the amplifier is switched on.
Bassboost frequency
This control (10) adjust the frequency which the bassboost (11) increases.
12.
9
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