Power Base Series Power Amplifiers
Page 13
4 Specifications
All specifications apply to units in Stereo mode with 8-ohm loads
and an input sensitivity of 26 dB unless otherwise specified.
Standard 1 kHz Power: refers to maximum average power in
watts at 1 kHz with 0.1% THD+noise.
Full Bandwidth Power: refers to maximum average power in
watts from 20 Hz to 20 kHz with 0.1% THD+noise.
120 VAC, 60 Hz Units: refers to amplifiers with dedicated trans-
formers for 120 VAC, 60 Hz power mains.
Performance
Frequency Response: ±0.1 dB from 20 Hz to 20 kHz
at 1 watt.
Phase Response: ±10 degrees from 10 Hz to 20 kHz
at 1 watt.
Signal-to-Noise: A-weighted, better than 105 dB be-
low full bandwidth power. Better than 100 dB below full
bandwidth power from 20 Hz to 20 kHz.
Total Harmonic Distortion (THD): Less than 0.05%
at full bandwidth power from 20 Hz to 1 kHz increas-
ing linearly to 0.1% at 20 kHz.
Intermodulation Distortion (IMD): (60 Hz and 7 kHz
4:1) Less than 0.05% from less than 158 milliwatts to full
bandwidth power.
Damping Factor: Greater than 1,000 from 10 Hz to 400 Hz.
Crosstalk
Power Base-1
: Greater than 75 dB below full band-
width power from 50 Hz to 2 kHz, rising linearly to
greater than 60 dB at 20 kHz.
Power Base-2
: Greater than 90 dB below full band-
width power from 50 Hz to 2 kHz, rising linearly to
greater than 66 dB at 20 kHz.
Power Base-3
: Greater than 90 dB below full band-
width power from 50 Hz to 4 kHz, rising linearly to
greater than 70 dB at 20 kHz.
Common Mode Rejection (CMR): Better than 70 dB
below rated full bandwidth power from 20 Hz to 1 kHz
falling linearly to better than 50 dB at 20 kHz.
Controlled Slew Rate: Greater than 13 volts/ms.
Voltage Gain: 20:1 ±3% or 26 dB ±0.25 dB at the maxi-
mum level setting (Input Sensitivity switch set to its 26
dB position).
Power Base-1
: 51:1 ±12% or 34.3 dB ±1 dB at 0.775
volt sensitivity; 28:1 ±12% or 29.1 dB ±1 dB at 1.4 volt
sensitivity.
Power Base-2
: 64:1 ±12% or 36.2 dB ±1 dB at 0.775
volt sensitivity; 35:1 ±12% or 31.0 dB ±1 dB at 1.4 volt
sensitivity.
Power Base-3
: 83:1 ±12% or 38.4 dB ±1 dB at 0.775
volt sensitivity; 46:1 ±12% or 33.3 dB ±1 dB at 1.4 volt
sensitivity.
Power
Output Power:
The following specifications are guaran-
teed minimums for standard 1 kHz power. For more infor-
mation, see the power matrices in Figures 4.1 through 4.6
(maximum average power @ 0.1% THD + N).
Power Base-1
Stereo mode (both channels driven):
240 watts into 4 ohms.
200 watts into 8 ohms.
Bridge-Mono mode:
455 watts into 8 ohms.
395 watts into 16 ohms.
Parallel-Mono mode:
455 watts into 2 ohms.
400 watts into 4 ohms.
Power Base-2
Stereo mode (both channels driven):
460 watts into 4 ohms.
325 watts into 8 ohms.
Bridge-Mono mode:
910 watts into 8 ohms.
660 watts into 16 ohms.
Parallel-Mono mode:
920 watts into 2 ohms.
655 watts into 4 ohms.
Power Base-3
Stereo mode (both channels driven):
760 watts into 4 ohms.
540 watts into 8 ohms.
Bridge-Mono mode:
1525 watts into 8 ohms.
1090 watts into 16 ohms.
Parallel-Mono mode:
1530 watts into 2 ohms.
1080 watts into 4 ohms.
Load Impedance: Safe with all types of loads. Rated
for 4 to 8 ohms in Stereo, 8 to 16 ohms in Bridge-
Mono and 2 to 4 ohms in Parallel-Mono mode.
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