14
INSTRUCTION MANUAL
GR300BT
DC CONNECTIONS
Please refer to the wiring diagram in the ‘Speakers’ section of this instruction manual.
Connect the
RED
power lead to the Positive (+) side of the battery or to an accessory
point in the vessel or vehicle’s fuse box that provides a +12 volt connection.
Connect the
BLACK
power lead to the Negative (-) side of the battery or to a ground
point in your vessel or vehicle.
IMPORTANT:
The
RED
power lead is fitted with a 6 amp fuse. If the fuse blows, use
only a standard 6 amp (3AG) fuse as a replacement. Use of a higher rated fuse or a
slow-blow type could result in damage to your radio which would void the warranty.
SPEAKERS
For simple installations, the GR300BT can be installed without external speakers.
The GR300BT’s internal monitor speaker can provide good quality mono sound
suitable for many applications. However, for full stereo sound and higher output
power you will need to connect a pair of external speakers using the speaker adaptor
leads supplied. The GR300BT’s internal monitor speaker is automatically disconnected
when the external speakers are plugged in.
If connecting external stereo speakers to your GR300BT, they should be connected
to the Left and Right speaker sockets at the rear of the unit. Note that the speaker
sockets are fitted with protective covers to protect against water ingress when not
in use. The GR300BT is supplied with two speaker adapter leads which are designed
to accept the standard bullet connectors commonly found on most marine and
automotive stereo speaker cables. The plugs on the speaker adapters plug into the
matching the sockets on the rear of the GR300BT. The speaker adapters are labelled
left and right and should be matched with the labels on the speaker socket cables to
ensure correct speaker phasing.
When connecting the speakers, observe the correct speaker polarity by matching the
white stripes on the speaker leads with the white stripes on the adaptor cable as
shown in the diagram. Incorrect polarity (speaker phasing) will result in a reduction of
bass response and stereo effect.
The use of speakers with an impedance of less than 4 Ohms is not recommended as
they will cause excessive loading of the GR300BT’s output circuit.
Note:
The GR300BT is a two speaker system that requires one pair of wires for each
speaker. Do not short the speaker wires together or touch them to the supply voltage
or to ground otherwise damage to the amplifier may result.
GR300BT
Bullet connectors
Speaker adaptor leads
White stripe
Speakers
L
R
