Specifications - McIntosh 168255 Owner's Manual

Preamplifier Specifications
Total Harmonic Distortion
0.005% maximum 20Hz to 20,000Hz
Intermodulation Distortion
0.005% maximum for any combination of frequencies
from 20Hz to 20,000Hz
Frequency Response
+0, -0.5dB from 20Hz to 20,000Hz
+0, -3dB from 10Hz to 100,000Hz
Preamplifier Output 1 and 2 (for rated input)
1.7V unbalanced (8V Maximum)
3.4V balanced (8V Maximum)
Preamplifier Output Impedance
220 ohms
Sensitivity (for rated output)
High Level - 300mV unbalanced
600mV balanced
Phono MM, 3.0mV
Phono MC, 0.3mV
Signal To Noise Ratio (A-Weighted)
High Level, 98dB below rated output
Phono MM, 84dB below 5mV input
Phono MC, 82dB below 0.5mV input
Input Impedance
High Level - 22K ohms Unbalanced
44k ohms Balanced
Phono MM - 50 to 400pF, in 50pF steps;
47K ohms
Phono MC - 25, 50, 100, 200, 400 or 1,000 ohms;
100pF
36
Maximum Input Signal
High Level, 8V unbalanced, 16V balanced
Phono MM, 80mV
Phono MC, 8mV
Headphone Impedance
100 to 600 ohms
Equalizer Controls
25Hz, 50Hz, 100Hz, 200Hz, 400Hz, 1,000Hz,
2,500Hz and 10,000Hz
+15
A
+10
M
P
L
I
T
+ 5
U
D
E
I
0
N
D
E
- 5
C
I
B
E
L
-10
S
-15
20 50 100
Voltage Gain
High Level to Rec Output: 0dB
High Level to Output 1 and 2: 15dB
Phono MM to Rec Output: 40dB
Phono MC to Rec Output: 60dB
Phono MM to Output 1 and 2: 55dB
Phono MC to Output 1 and 2: 75dB
200 500 1k
FREQUENCY IN HERTZ
2k 5k 10k 20k