– 12 –
– 13 –
2.2 CONTROLS AT UPPER AMP PANEL
8 PHASE SHIFT CONTROL
Phase control potentiometer for the phase adjustment of the active sub, to match the
acoustical phase of the bass output with other speakers installed in the vehicle
9 CROSSOVER FREQUENCY CONTROL
Crossover control potentiometer to adjust the lowpass frequency of the electronic
crossover with 12dB/oct. between 50 to 120Hz
10 INPUT GAIN CONTROL
Input level gain control potentiometer, allowing to match the output voltage of the head-
unit’s RCA line-outs to the amp input of the active sub
11 POWER/PROTECTION LED
Green LED signalling correct operation of the amp module, red (“protection”) LED,
signaling general malfunction of the amp-module, i.e. overheating, shortcut a.s.o.
12 HIGH LEVEL ADAPTER
Plug to connect the loudspeaker outputs of a headunit to the amp module, if the headunit
has no dedicated RCA line-outs
– 12 –
bn
bl
9
8
bm
Summary of Contents for AB25A
Page 20: ...silver black Pant 267 ...