※Shipping service. Supervised by Saeki Tamon/Basics: History, Playback Areas, High Fidelity Playback/Speaker Units Edition: Basic Operation, Frequency Response, Electrical Impedance Curve/Speaker System Edition: Crossover Frequency, Transient Distortion Characteristics, Others/ “Get Stronger! Revised/2008.2.6 9th edition of “Speaker & Enclosure Encyclopedia” published. The photo is a sample, so the actual item may be broken, have marks, etc.