If powered by HU, its recommended to get one with high sensitivity ie >90db @1w/1m (e.g. Infinity 6520 on Shopee), takes less power for equivalent loudness compared to other brands (<90db@1w/1m).

Fyi it takes 2x the power for every 3db increase in spl (its a logarithmic scale, not linear)

Also recommended to soundproof your doors to increase its mass so that the door's natural resonance frequency are lower than stock metal and requires more energy to excite

This post has been edited by [peanut]: Feb 3 2022, 08:43 PM