Multiple subwoofers can replace bass traps and even improve efficiency

Evidence

However, with a well set up multiple subwoofer installation, bass traps may not be needed. It is a trade-off of cost, convenience, appearance and function. Multiple subs; for most rooms they don’t have to be large, and there are clever designs that are not visually offensive, and sometimes can be hidden. Will be discussed in Chapter 14, absorption of any kind reduces system efficiency; multiple subwoofer arrays usually increase system efficiency. There are choices. — Toole, Floyd E, Sound reproduction- the acoustics and…, 1385

Categorization

• QUESTION: Chapter 14 is referenced as the payoff — worth checking to see how sub arrays increase rather than decrease system efficiency.