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DIY For Audio
Battery driven 3.5V to 5V mini chip amp for speakers based on PAM8406 - my take
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<blockquote data-quote="Timber_MG" data-source="post: 701954" data-attributes="member: 18"><p>The thing to know, is that these boards can sound absolutely awful when clipping. With a flea power SE valve amp at least it gets a bit grainy and gritty as you go over -10dBfs in most cases where here the effect is sudden. It may be beneficial to have a buffer (pre) clip just below the point where the module clips do or set the gain structure from the source so that it never clips.</p><p></p><p>There was a ~10Wpc amp at the DIY where bbe2 played some 4.5" 2-ways (the small un-squares) fairly satisfactorily at low levels, but the mid just got all fuzzed up when he turned it up a bit (and he had to because there was an open sliding window behind them). When he inserted a higher power amp things were markedly improved according to those there and here in my room they were very coherent sounding for a small 2-way, especially given the build cost.</p><p></p><p>With these small amps it's easier to run into limits and the difference between a small amp that punches above its weight ime is one that has good clipping recovery, as many people don't pick out slight clipping at the onset. Much latter day music is clipped during mastering post compression to boost volume.</p></blockquote><p></p>
[QUOTE="Timber_MG, post: 701954, member: 18"] The thing to know, is that these boards can sound absolutely awful when clipping. With a flea power SE valve amp at least it gets a bit grainy and gritty as you go over -10dBfs in most cases where here the effect is sudden. It may be beneficial to have a buffer (pre) clip just below the point where the module clips do or set the gain structure from the source so that it never clips. There was a ~10Wpc amp at the DIY where bbe2 played some 4.5" 2-ways (the small un-squares) fairly satisfactorily at low levels, but the mid just got all fuzzed up when he turned it up a bit (and he had to because there was an open sliding window behind them). When he inserted a higher power amp things were markedly improved according to those there and here in my room they were very coherent sounding for a small 2-way, especially given the build cost. With these small amps it's easier to run into limits and the difference between a small amp that punches above its weight ime is one that has good clipping recovery, as many people don't pick out slight clipping at the onset. Much latter day music is clipped during mastering post compression to boost volume. [/QUOTE]
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DIY & Tutorials
DIY For Audio
Battery driven 3.5V to 5V mini chip amp for speakers based on PAM8406 - my take
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