Alphasonik PM12005E Manuale Utente

Turning On The Amplifier        

        

The amplifier automatically turns on a few seconds after you turn vehicle’s igni-

tion switch to ACC ON or turn on your auto sound system, depending upon how 

you wired the system. The POWER indicator on the top of the amplifier illumi-

nates when the amplifier is on.        

        

Important: Your amplifier requires 90 amps or more of power from your vehicle’s 

battery during operation. To protect your battery from your battery from dis-

charging, do not operate the amplifier unless your vehicle us running.        

        

Adjusting The Audio Level (“Gain Matching”) By Ear        

        

For best performance, you must match the amplifier’s input sensitivity to your 

source unit’s maximum output level. The GAIN CONTROL (MIN / MAX) located 

on the side of the amplifier is designed to do this. It is Not a volume control. It 

adjusts the incoming signal level so that the source unit and amplifier reach 

maximum output at the same time. This assures that maximum system is 

achieved with minimal distortion.        

        

1. Turn the GAIN CONTROL (MIN / MAX) fully counterclockwise to MIN.        

2. Play full frequency music that has continuous high levels (FM pop music is a 

good choice).         

3.  Turn up the source unit’s volume control until just before you hear the source 

unit’s distortion or 90% of full output (which ever comes first).        

4. SLOWLY turn the GAIN CONTROL clockwise until just before you hear 

amplifier or speaker distortion, until you reach a maximum comfortable listening 

level (which ever come first).        

5. Turn the source unit’s volume control back to a desire comfortable listening 

level and enjoy.        

The BASS BOOST CONTROL raises the amplifier output up to 18db at fre-

quencies tightly centered around 45 Hz. This “bump” can have a dramatic affect 

on the bass system’s apparent volume. Use caution (!) when adjusting this 

control as serious subwoofer damage may result from overpowering or overex-

cursion.        

Plus 18dB

@45Hz

FREQUENCY RESPONSE

RESPONSE (dB)

FREQENCY (Hz)