Crate Amplifiers TX50DE - Manual (Page 5)

C R A T E
5
ABOUT THE POWER SUPPLY (continued):
The TX50DE may also be powered by using a 12-volt vehicle cigarette
lighter adapter, available at most electronic supply stores. Make certain
that the polarity on the adapter matches what is shown below.
Connect the small round end of the adapter to the 12VDC Automobile
adapter jack (#26, page 8), then connect the other end of the adapter
into the vehicle’s cigarette lighter socket. (In some vehicles, the ignition
switch must be in the “on” or “accessory” position to have power at the
socket.) NEVER PLUG THE SUPPLIED 15VDC CHARGER INTO THE
AMPLIFIER’S 12VDC LIGHTER PLUG!
When using the DC cigarette lighter adapter, the vehicle’s battery will
keep the amp charged to its own voltage level – if the battery has a
13.5-volt charge, the amp will charge up to 13.5 volts; if the battery is
low and only has a 10-volt charge, the amp will discharge down to 10
volts.
POSITIVE NEGATIVE