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posies23
12
Nov 3, 2017
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Massdrop's ad copy for this amp says 'At its recommended uses with minimum distortion, the SA-98E can drive 120W per channel'
I wonder what Massdrop considers to be minimum distortion ?
I wish Massdrop would source amplifiers for the Audiophile community that provided power ratings at 0.1 percent and 1.0 percent THD from 20Hz to 20kHz
Instead one is often left digging through technical PDF's on amplifier chips to guesstimate such power ratings
Nov 3, 2017
A community member
Nov 4, 2017
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Found this at partsexpress... Agree completely about showing power ratings at lower distortion levels.
Power output: 2 x 160 watts max @ 4 ohms (12% THD), 2 x 80 watts max@ 6 ohms (10% THD), 2 x 60 watts max @ 8 ohms (10% THD)
Nov 4, 2017
None572958
48
Nov 4, 2017
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Parts Express is listing 10% THD at 60W per channel. This is probably a 20W amp.
Nov 4, 2017
posies23
12
Nov 7, 2017
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http://www.st.com/content/ccc/resource/technical/document/datasheet/ad/92/18/e8/c0/bf/42/b6/DM00044235.pdf/files/DM00044235.pdf/jcr:content/translations/en.DM00044235.pdf
the above PDF has technical details on the amplifier chip - figure 4 on page 11 shows stereo power output at 4 ohms at various distortion levels - from 30 to 20 to 10 to 1 percent THD - the ad copy says the power brick supplies 32V - at that voltage this chip supposedly can deliver around 100 watts at 1 percent THD - per the PDF - Figure 6 displays THD over Frequency Response but does not specify voltage or wattage - my speculation is THD rises fairly quickly from 0.1 percent THD to 1 percent THD for this chip and this amp may produce 60 to 80 watts into 4 ohms from 20Hz to 20kHz at 0.1 percent THD
Nov 7, 2017
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