Right Seklem. The SA-98E and PA-3 are approximately 50 wpc amps into 8 ohms at reasonably low distortion (ref Xulonn's thread above or TI's power figures for the amp).
The problem is not the chip. I just tested my Indeed TDA7489E amp and I can just barely hear hiss 3 inches from the tweeter, no further than that with 87dB efficiency speakers. The issue is the input gain chosen by the amp mfg, not the chip or the power. We do not know the gain setting of the SA-98E (I can find no tests). One user reviewer of the SA-98E said he could not use it above 9 O'clock on the volume or it blasted him out...so that is not encouraging. On the other hand... a very slight audible hiss bothers some people a lot more than others. I guess you do not know until you experience it.
The problem is not the chip. I just tested my Indeed TDA7489E amp and I can just barely hear hiss 3 inches from the tweeter, no further than that with 87dB efficiency speakers. The issue is the input gain chosen by the amp mfg, not the chip or the power. We do not know the gain setting of the SA-98E (I can find no tests). One user reviewer of the SA-98E said he could not use it above 9 O'clock on the volume or it blasted him out...so that is not encouraging. On the other hand... a very slight audible hiss bothers some people a lot more than others. I guess you do not know until you experience it.
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