Class D vs AB in 2024 — can you actually hear it?

Posted May 18, 2026 · 3 replies

Labubu Off-topic

Genuinely asking. With modern modules (Purifi, NCx500) the measurements are basically transparent. I A/B'd my old AB amp against a Purifi build and could not pick them blind.

Is there any audible reason left to run a big hot AB amp, or is it nostalgia at this point?

3 replies

The Listener May 22, 2026

I keep my AB for the meme of a glowing bias LED honestly.

Labubu OP May 20, 2026

Nostalgia and the heat in winter. Blind, transparent is transparent.

Labubu OP May 22, 2026

For most speakers, no. For nasty reactive loads the better AB designs can still flex, but Purifi handles those too now.

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