Yamaha XS250 - Manual (Page 6)

6
4 SPEAKERS terminals
Two types of speaker output terminals:
Binding post (Channel A-1, B-1) and barrier strip
(Channel A-2, B-2) are available.
These parallel wirings are internally connected and
output identical signals simultaneously. The output
impedance varies depending on whether you use
either or both types of SPEAKERS terminals. (Refer
to “Speaker Impedance” on page 7 for more informa-
tion.)
The following figures show terminal polarity in
STEREO, PARALLEL, and BRIDGE modes.
• STEREO, PARALLEL mode
B-2 CHANNEL A-2
8-16 Ω (BRIDGE)
(–) (+)
4-8 Ω /CHANNEL (STEREO)
B-1 CHANNEL A-1
8-16 Ω (BRIDGE)
(–) (+)
4-8 Ω /CHANNEL (STEREO)
SPEAKERS
• BRIDGE mode
B-2 CHANNEL A-2
8-16 Ω (BRIDGE)
4-8 Ω /CHANNEL (STEREO)
B-1 CHANNEL A-1
8-16 Ω (BRIDGE)
4-8 Ω /CHANNEL (STEREO)
SPEAKERS
In BRIDGE mode, the (-) jacks of CHANNELS A-
1, B-1 and A-2, B-2 are not used.
The minimum impedance for the connected speaker
system is specified in “Speaker Impedance” on page 7.
5 INPUT terminals (CHANNEL A, B)
Two types of balanced terminals for channels A and B
are provided.
Channel A input terminal is used in BRIDGE and
PARALLEL mode.
• XLR-3-31 type connector
They are wired pin 1–ground, pin 2–hot (+), and pin 3
cold (-).
1 2
3
Cold
Ground Hot
• Barrier strip
Hot (+), Cold (-) and Ground (G).
6 GND terminals
This is the grounding screw terminal. If hum or noise
occurs, ground (earth) the unit via this jack, or try
connecting it to the chassis of the mixer or preamp,
etc.