Yamaha MX-1000U Owner's Manual page 7
Natural sound stereo power amplifier
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Also See for MX-1000U:
- Owner's manual (13 pages) ,
- Owner's manual (12 pages) ,
- Service manual (19 pages)
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@ POWER switch and indicator: Pressing this switch turns power
Readings are accurate for the load determined by the LOAD
on, causing the POWER indicator to light. To turn the unit off,
:
selectors.
@ SPEAKERS selectors: Allow you to select any of the speaker pairs
power display according to the speaker load impedance. When
'connected to the A, B and/or C terminals by pushing the ap-
using more than one pair of speakers atthe same time, you can
= combined impedance
ff speakers are connected to terminals B, but not to terminals C,
(X x Y)/ (X +Y)
be sure to press only the B SPEAKERS selector when listening via
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Example for 2 pairs of 8 ohm speakers:
pair B. Pushing in selector C as well will cut off the sound from
(8 x 8) / (8 + 8) = 4 ohms
pair B since B and C are connected in series. (The same holds true
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if speakers are connected to C and selector B is pressed.)
2) 2 pairs in series (B +C)
a
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o a r s
o
X + Y = combined impedance
© PROTECTION indicator: Lights for several seconds after power
_ 3) 3 pairs (A+B+C)
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is turned on, showing that the internal protection circuitry is
Same formula as 1), with A=X
and (B+C)=Y
currently activated.
This mutes the output signal to the
speakers, preventing the loud noise otherwise heard when
switching on the amplifier.
lf the combined impedance does not correspond exactly to one
of the three LOAD settings, select the closest one.
© METER switch: Switches the power peak meter OFF. (This power
display is not illuminated when the METER swier is pressed
in.)
os
e s
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ht
imaging. These controls can also serve to protect speakers
© PEAK HOLD: When this switch is pressed, power peaks are dis-
with power handling capacity lower than this amplifier's rated
played for a second longer, making it easier to read peak levels.
output.
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@ Power peak meter and digital display: The left and right channel
bar meters indicate the peak power output on a logarithmically
compressed scale from 0.003 to 1000 watts. At the same time,
the precise peak wattage of the higher-level channel is also
shown by the digital power display beneath the bar meter scale.
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