Page 27
Contractor Series Power Amplifiers
Reference Manual
7 Specifications
Note: All measurements apply to all models of CH and CL series
amplifiers in stereo mode with 8-ohm loads and an input sensi-
tivity of 26-dB gain, 1-kHz at rated power unless other otherwise
specified. Specifications for units supplied outside the U.S.A.
may vary slightly at different AC voltages and frequencies.
Power
Load Impedance:
Safe with all types of loads.
CH1:
4 and 8 ohm Stereo;
16 ohm at 70V Stereo;
32 ohm at 100V Stereo;
8 and 16 ohm Bridge;
32 ohm at 140V Bridge;
64 ohm at 200V Bridge.
CH2:
4 and 8 ohm Stereo;
8 ohm at 70V Stereo;
16 ohm at 100V Stereo;
8 and 16 ohm Bridge;
16 ohm at 140V Bridge;
32 ohm at 200V Bridge.
CH4:
4 and 8 ohm Stereo;
4 ohm at 70V Stereo;
8 and 16 ohm Bridge;
8 ohm at 140V Bridge.
CL1, CL2 and CL4:
2, 4 and 8 ohm Stereo;
4, 8 and 16 ohm Bridge.
Voltage Gain, 1 kHz, 1.4V sensitivity,
CH1,
30.5 dB (4/8 ohm);
34 dB (70V);
37 dB (100V).
CH2,
32.1 dB (4/8 ohm);
34 dB (70V);
37 dB (100V).
CH4,
34 dB (4/8 ohm);
34 dB (70V).
CL1,
30.5 dB at (4/8 ohm).
CL2,
32.1 dB at (4/8 ohm).
CL4,
34 dB (4/8 ohm).
AC Line Requirements:
Note: North American CH 1, CL 1, CH 2 and CL 2
units are 60 Hz only. All other models are 50/60 Hz.
Voltages are ±10%.
AC Line Current,
CH 1 & CL 1:
100 Volts: 7.6 A;
120 Volts: 6.3 A;
230-240 Volts: 3.5 A.
CH 2 & CL 2:
100 Volts: 11.4 A;
120 Volts: 9.5 A;
230-240 Volts: 5.0 A.
CH 4 & CL 4:
100 Volts: 8.5 A;
120 Volts: 7.1 A;
230-240 Volts: 3.7 A.
AC Line Connector:
Detachable 15A IEC connector
with country-specific plug.
Output Power:
(See Figure 7.1).
Performance
Frequency Response, 20 Hz to 20 kHz at 1 watt,
CH 1, CH 2, CL 1 & CL 2:
±0.1 dB (see Figures 7.2
and 7.3).
CH 4 & CL 4:
±0.25 dB (see Figure 7.4).
Phase Response:
±15 degrees from 20 Hz to 20 kHz
at 1 watt.
Signal to Noise Ratio, A-Weighted,
CH 1, CH 2, CL 1 & CL 2:
Better than 105 dB below
rated 1-kHz power.
CH 4 & CL 4:
Better than 102 dB below rated 1-kHz
power.
Total Harmonic Distortion (THD), 1 kHz at rated
power:
0.5% or less true THD from 20 Hz to 20 kHz.
Intermodulation Distortion (60 Hz and 7 kHz at
4:1):
Less than 0.1% at rated power to 30 dB below
rated power at 8 ohms.
Damping Factor (8 ohm),
CH 1, CH 2, CL 1 & CL 2:
Better than 400 from 10 Hz
to 400 Hz (see Figure 7.5).
CH 4 & CL 4:
Better than 700 from 10 Hz to 400 Hz
(see Figure 7.6).
