It depends how you define large.
Box speakers suffer/benefit from up to 12dB/octave of room gain once half a wavelength (1130 feet / frequency / 2) exceeds the longest dimension.
Put a box speaker with low bass extension in a small environment (like a car) and the bottom end will be very exagerated regardless of the physical speaker size.
All else equal a bigger box will get you lower bass - but ports change things. Just using larger drivers won't get you lower bass - although all else equal you'll get less distortion and lower off-axis response at higher frequencies. It's also possible to electronically correct the excessive bass with a shelving high-pass filter.
Full-range dipoles also don't experience the effect. You could run a dipole sub-bass system with 4-8 12-15" drivers a side and not have room gain.
Box speakers suffer/benefit from up to 12dB/octave of room gain once half a wavelength (1130 feet / frequency / 2) exceeds the longest dimension.
Put a box speaker with low bass extension in a small environment (like a car) and the bottom end will be very exagerated regardless of the physical speaker size.
All else equal a bigger box will get you lower bass - but ports change things. Just using larger drivers won't get you lower bass - although all else equal you'll get less distortion and lower off-axis response at higher frequencies. It's also possible to electronically correct the excessive bass with a shelving high-pass filter.
Full-range dipoles also don't experience the effect. You could run a dipole sub-bass system with 4-8 12-15" drivers a side and not have room gain.