No, a bookshelf speaker will not go that low, nor would you want it to. In a 14 foot square room, standing waves would be terrible.
Richard
Richard
Low volume bookshelf spkrs that go from 20 to 20k?
I hate to hijack the thread but this is on topic since he wants 20Hz response. What does "apparent bass" mean? It seesm to me you either hear the sound or you don't. I get very low frequencies in a room that is 17 feet long? You don't have to have a standing wave to hear the sound. If that were true how can headphones produce low bass? |
A 20hz soundwave is 27.5 feet long. It simple can't be achieved in a small room though Good point...the long waves can be achieved but modal issues will be absolutely huge....a central position in a 14 foot room will be 7 feet from a wall and therefore reflections will be 14 feet behind the primary signal or a half wavelength off.... leading to large nulls followed by large bumps at the listening position as you go up in extreme LF frequencies...extremely bumpy. A rectangular not square shaped room and a listening position 38% from rear or back wall will help. It might be better not to bother to produce these extremes (if it is for a bedroom music system), concentrate on something with a good mid range, small and elegant...with nice vocals and dynamics, IMHO... Here is another suggestion for something small SCM10-2 |
>A 20hz soundwave is 27.5 feet long. It simple can't be achieved in a small room though the apparent bass can be very good in a properly treated room. At 1130 feet/second a 20Hz wave is 56.5 feet long although this is not relevant. If we were unable to hear sound waves longer than the space that contained them, we couldn't go below 12KHz when using earphones in our inch-long canals. A pressure source (conventional box speaker) in an infinitely rigid sealed space experiences a gain of 12dB/octave below the fundamental resonance with a frequency of 1130 feet/second / 2 / the longest dimension (in feet). This can be good : 12dB/octave nicely complements a sealed speaker's roll-off. The original poster should be able to achieve flat bass with a sealed speaker that has a 40Hz resonance frequency. Or it can be bad. A flat sub-woofer in a car is going to be very bloated. Velocity sources (Dipoles, cardioids) work in small spaces too. |