Pioneer GM-D7500M Owner's Manual page 4

Section
01 Before you start
! In the event of any abnormality, the power
supply to the amplifier is cut off to prevent
equipment malfunction. If this occurs, switch
the system power OFF and check the power
supply and speaker connections. If you are un-
able to determine the cause, please contact
your dealer.
! Disconnect the negative terminal of the bat-
tery before installation.
CAUTION
! Always keep the volume low enough to hear
outside sounds.
! Extended use of the car stereo while the en-
gine is at rest or idling may exhaust the bat-
tery.
! Connect either of two subwoofers to the am-
plifier; 1: a subwoofer with a 250 W or larger
nominal input and an impedance 4 W, or 2: a
subwoofer with a 420 W or larger nominal
input and an impedance 2 W. If the nominal
input and impedance are out of the above
ranges, the subwoofer may catch fire, emit
smoke or become damaged.
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