VPA2350MB
3
VELLEMAN
c. Balanced / Unbalanced Input Connection
Both amplifier channels feature a balanced XLR female socket as well as a
balanced 6.35mm phone jack socket.
Input cables must be screened!
If an unbalanced input signal is to be connected using an XLR plug, a wire bridge must be inserted
between PIN1 and PIN3 (see figure on the left). For an unbalanced signal input, a 6.35mm mono
jack plug can also be used.
d. Mono / Bridge Mode
In
MONO mode
, only the channel A input is active. The selection switch (#12) must be set to the BRIDGE position.
In
BRIDGE mode
, both amplifier channels (A & B) are internally bridged to perform as one single channel. Only the
channel A input is active.
In both modes, only the BRIDGE output connector (#14) may be used. The channel
A and B connectors (#13 & 15) are only for use in STEREO mode (selection switch
#12 in STEREO position). The connection must be made as in the figure on the
right, using a professional connector (type CAS101):
e. Stereo Mode
In STEREO mode, connect channels A and B through the XLR or phone jack plugs. The selector switch (#12) must
be set to STEREO. Use the channel A & B output connectors (#13 & 15).
f. Parallel Mode
Mono or bridge mode will mostly only allow driving one single loudspeaker system due to the 8
Ω
min. impedance
.
If, for example, a number of floor monitor loudspeaker systems (8
Ω
each) are to be driven, channels A and B should
be operated in parallel mode:
- connect the input signal to the channel A XLR input
- connect the channel A and B phone jack inputs by means of a shielded patch cable.
- set the selector switch (#12) to STEREO
- connect the speakers through connectors A and B (#13 & 15).
6. Cleaning and Maintenance
1. All screws should be tightened and free of corrosion.
2. The housing and fixations should not be deformed, modified or tampered with.
3. The electric power supply cables must not show any damage. Have a qualified technician maintain the device.
4. Disconnect the device from the mains prior to maintenance activities.
5. Wipe the device regularly with a moist, lint-free cloth. Do not use alcohol or solvents.
6. There are no user-serviceable parts except for the fuse.
7. Contact your dealer for spare parts if necessary.
