Yamaha p1150 Service Manual page 4

PI
1
50/Pl 250/P21 50/P2250
P2150
STEREO OPERATION
(Power output
specified
per channel, with both channels
driven)
BR
IDGED
MONO
OPERATION
Output Power Specs meet
8
ohms
4
ohms
16
ohms
8
ohms
20Hz
-
20kHz
1kHz
20Hz
-
20kHz
20Hz
-
20kHz
1kHz
20Hz-
20kHz
Continuous
sine
wave
output
power
at less
than
0.05%
THO
100
w
105
W
150
W
165 220
W
250
W
300
W
330
W
Total
Harmonic
Distortion
(THD)
<0.007%
@>55W
<
0.003%
@55W
<0.01%
<0,005%
@
75
W
@
75
W
<0.007%
@
110
W
<0.003%
@
now
<0.01% <0.005%
@150W @150W
Channel
Separation (@ 3
dB
below
nominal
power
output,
ATT @
max,
input shorted)
>70dB
>90
dB
Intermodulation Distortion
(IHD)
60
Hz
&
7
kHz
4
:
1
<0.005%
(S)
55
W
<0.01% @
75
W
<0.01%
@
110
W
<0.01%
@>
150
W
Power Bandwidth (@
THD
<0.1%)
1
0 Hz
to
50 kHz<s>55
W
10
Hz
to
50 kHz
(5)
75
W
10 Hz
to
50 Hz
@
110
10
Hz
to
50 kHz
(3
150
W
Frequency Response
(1
watt output)
+0,
-IdB, 10Hz
to
50kHz
Damping
Factor
>110C
1
kHz
>55@
1
kHz
Slew Rate
± 50
volts/n
full
swing
licrosecond ± 90
volts/microsecond
full
swing
Signal-to-Noise (Input shorted)
>
1
10 dB,
-6
dB/octave
LPF
(3
12.47
kHz
^115
dB,
IHF-A network
>106d
>110d
B,
-6
dB/oct
B,
IHF-A
net
ave
LPF @
12,47
kHz
Residual
Noise
(Input
ATT @
minimum)
<-80
dB
^-90
dB
T),
-6
dB/octave
LPF
@
12.47
kHz
Ti,
IHF-A network
Input
Impedance
>15kohn
IS,
balanced
o unbalanced (ATT
@
max)
Sensitivity
+4
dBm
(1
23
V
rms) fo nominal output
(4
ohm
load)
Voltage Gain
26.0
dB
Indicators
Signal:
Clipping:
Protection
Pilot:
Green
LED
(20
Hz
-
20
Red
LED
tu
Red
LED
tu
Red
LED
tu
urmon
whensgnal
presen
rnson
when
THD
>1%
(x
rns
on when
protection or
rns
on
when
power
is
on.
t
at
output
is
2).
volts
RMS
Protection Circuits
Muting:
DC
sense:
Thermal:
Current L
Output
shui
Output
shut
miter:
Outpu
sd
6 seconds
(± 2
sec.)
afte
off
if
±
2V DC
sensed
at
o
off
if
heat
sink
temp.
>85
reduced
if
load
<2
ohms
power
Is
on.
degrees
C.
Fan
Circuit
Fan
is
normally
at
low
s
then
resets
to
low
at
45
peed;
when
heat sink reaches
60
degrees
C.
Centigrade,
fa
goes
to high speed;
Controls
Front: 2 x
32
step Input Attenuators;
0
to
—20 dB
-33, —37, —42, -50,
-60
dB, and
infinite attenuat
Push On/Push Off
POWER
switch.
Rear:
MONO/STEREO MODE
switch.
n
1
dB
steps.
-20
to
-30
dB
in
2
dB
steps,
then
Power Requirements
105-
130
volts,
50
or
OHz,
AC, 500
W
(600
V A
Weight 37.4
lbs
(1
7 kg)
Dimensions Width:
Height:
Overall
De
Depth Beh
pth:
nd Front
Par
18-7/8
inches (480
mn
5-1/4 inches (132
mn
16-3/4 inches (423
mn
el:
15-1/8
inches (384
mn
1)
1)
Accessories
Rubber
ca
(included)
as
of discoura ge unauthorized
or acciden
al
changes
in
setting of inp
jt
attenuators