Adcom GFA-585 Service Manual page 12

GFA-585 SPECIFICATIONS
Power
Rating (To
FTC
Requirements)
250
watts
continuous average power
into
8
ohmsat
any
frequency between 20Hz and 20kHz
with both channels
driven
at
less than
0.02% THD.
400
watts continuous average
power
into4
ohms
at
any
frequency between 20Hz and 20kHz
with
both
channels
driven
at
less than
0.02% THD.'
' With
tan option
installed.
IM
Distortion
(SMPTE)
1
watt
to
250
watts
into
8
Ohms
<0.005%
1
watt
to
400
watts
into
4
Ohms
<0.005%
IM
Distortion
(CCIF,
Any
Combination from
4kHz
to
20kHz)
250
watts
into 8
Ohms
<0.002%
400
watts
into
4
Ohms
<0.003%
THD
+ Noise
at
250 Watts
into
8
Ohms
20Hz
0.002%
1kHz
0.002%
10kHz
0.004%
20kHz
0.010%
THD
*
Noise
at
400 Watts
into
4
Ohms
20Hz
0.003%
1kHz
0.003%
10kHz
0.007%
20kHz
0.015%
Frequency Response
@
1
Watt
into 8
Ohms
10Hz
to
20kHz
+0.
-0.5dB
Power
Bandwidth
(—
3dB)
0,7Hr
to
80kHz
Dynamic Headroom
into
4
Ohms
2,ldB
SIgnal-to-Noise Ratio,
"A" Weighted
250
watts
Into
8
Ohms
>110dB
Gain 27dB
Input
Impedance
50,000
ohms
Input Sensitivity
250
watts
into 8
Ohms
2V rms
1
watt
into
8
Ohms
130mVrms
Damping
Factor
20Hz
to
20kHz
>600
Rise
Time
5kHz,
1
20V peak-to-peak square wave,
20%
to
80%
2.9us
Semiconductor Complement
.
72
transistors,
1 1
zener
diodes,
31 diodes,
2
ICs.
2 diode bridges
Power Consumption
(Continuous, Both
Channels
Driven)
Quiescent 90VA
Maximum
1800VA
250
watts
into
8
Ohms
750VA
400
watts
into
4
Ohms
1
300VA
GENERAL
Power
(available
In
220V
or
240V
on
special order)
Chassis Dimensions
Maximum
Dimensions
Weight
Weight,
Packed
120VAC/50-60HZ
..
B"(203mm)
x
17"(432mm)
x
123/i#"(310mm)
8 V»"(21
3mm)
x
1
7"(432mm)
x
1
2*/t«"(31
0mm)
45
lbs.
(20.5kg)
49
lbs.
(22.5kg)
CVC
1930
11