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I had a question related to Class D

Hello all, I 'm testing TDA7498 100 watt class D amplifier. I had a question that relates to Class D. I'm thinking about buying a Class D solid state guitar amplifier, but I heard that Class D amps lose a lot of their power (more than Class A or A/B amps do) when they drive speakers above 4 ohms, and my speaker happens to be 8 ohms. Is this so? If it is, the high watts the amp manufacturer claims for the amp don't seem as impressive.

bryant11

Showing 1 response by mwinkc

mwinkc
377 posts
 

It seems odd to me that a manufacturer would post output specs at 10% THD. Who cares?

Why wouldn't they publish specs for a listenable THD?

My Parasound New Classic 200 Integrated uses Pascal D modules outputting 110 wpc with .05% THD @ 4 or 8 ohms.

They publish a 1% THD as well, but I don't care that if outputs 125 wpc at that THD level... it just tells me not to turn it up to 90-100% volume.

This D amp can get way louder than I'll ever need with 8 ohm, 87 dB speakers with the volume at 35-40%.  No power dropping off with 8ohm speakers. I'm guessing that story is from older D amps.

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