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Power Base Series  Power Amplifiers

Page 13

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.

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.

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.

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.