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Philips Semiconductors Product specification
2 x 6 W hi-fi audio power amplifier TDA1521A
Fig.8 Output power as a function of supply voltage; asymmetrical supply; RL= 8 ; f = 1 kHz.
Fig.9 Distortion as a function of frequency; asymmetrical supply; VS= 24 V; RL= 8 ; Po= 3 W.