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QUAD 303 Specification

QUAD 303 Power Amplifier Specification

The figures and curves refer to measurernents on either channel, with or without the other channel operating

 Power Output & Distortion:
 (with unrestricted bandwidth)

 70Hz         0.03%     }  Any level up to 28W 16 ohms load
 700Hz       0.01%     }  Any level up to 45W 8 ohms load.
 10kHz        0.10%     }

 Frequency Response:

 -1dB (ref 1 kHz) @ 30Hz and 15kHz into 8 ohms
 -1dB (ref 1 kHz) @ 20Hz and 35kHz into 16 ohms.

 Output Source Impedance:  0.3 ohms in series with 2000µF and 6µH
 Input Level:  0.5V rms for 30 watts into 16 ohms
 Input Impedance:  22K ohms in parallel with 60pF
 Hum and Noise:  -l00dB below full output
 Interchannel Crosstalk:  30-10,000 Hz better than 60dB. Input load I K ohms
 Stability:  unconditionally stable with any load
 Power Input:  100-125 or 200-250V 50-60 Hz.
 40-200 watts depending on signal level.
 Weight:  l8 lb. (8.2Kg.)
 Dimensions:  Width 4.75" (l20mm.)
 Height 6.25" (159mm.)
 Depth l2.75" (324mm.)
 (plus 1.25" (38mm.) for connectors
 Other Applications:  The amplifer may be used for any purposes into load
 impedances greater than 8 ohms. Below 8 ohms applications
 should be restricted to music and speech reproduction or
 intermittent sine- wave duty.

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