An equalizer is described which extends the low-frequency response of a closed-box loudspeaker system. The equalizer consists of an auxiliary active filter that converts the overall system response to that of a fourth-order Butterworth alignment. The method used to realize the equalizer is general and can be extended to transfer functions other than fourth-order Butterworth. The circuit realization requires knowledge of the resonance frequency and total quality factor of the closed-box system.
Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $33 for non-members and is free for AES members and E-Library subscribers.