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09-13-2018, 11:42 AM
Hi Guys
Yes, class-D amps are highly compromised as far as their application to drive speakers goes. They are "functional" enough for subwoofers but no where near what true high-fidelity requires.
As far as SMPS goes, the output is too high an impedance and too variable an impedance to make a proper "other half of the signal path" for linear audio loads. This is relatively easy to fix by adding an active hum filter on the output. Obviously, we do not need this filter hum per se; rather, we use it to provide a low-impedance over the bandwidth of the audio circuit. As always, we follow Galactic Ground methods to assure that the quiet audio ground is not corrupted by the noisy SMPS output.
Yes, class-D amps are highly compromised as far as their application to drive speakers goes. They are "functional" enough for subwoofers but no where near what true high-fidelity requires.
As far as SMPS goes, the output is too high an impedance and too variable an impedance to make a proper "other half of the signal path" for linear audio loads. This is relatively easy to fix by adding an active hum filter on the output. Obviously, we do not need this filter hum per se; rather, we use it to provide a low-impedance over the bandwidth of the audio circuit. As always, we follow Galactic Ground methods to assure that the quiet audio ground is not corrupted by the noisy SMPS output.
