Measuring DIY Speakers — ported / sealed — insulated / not — plastic fiber concrete boxes — Room acoustics, treatments
https://www.youtube.com/watch?v=jjZHFIdfUFk Helium gas inside enclosure. Overall +2dB gain as speaker back-pressure is reduced. Anechoic chamber response — blue/purple is speaker-forward facing; red is speaker-rear facing (into absorptive lining). Ported vs Sealed. Ported gives overall more bass output (+5dB), all other factors approximately equal. Green is ported; blue/purple is sealed. … Read more