Patent ID: 7912233
Filing Date: 2011-03-22
Classification: G10H,H04R

Abstract:
1. A speaker system for a musical instrument comprising: an input terminal to which an electrical signal may be applied; a preamplifier unit that alters the frequency characteristics of an electrical signal applied to said input terminal; a power amplifier that amplifies said electrical signal; a speaker that is driven by said power amplifier; a feedback means that detects displacement of said speaker, generates a feedback signal that is representative of the displacement of said speaker, and feeds back said feedback signal to said power amplifier; a feedback amount setting means that sets an amount of said feedback signal that is fed back by said feedback means; a level detection means that detects an output level of said preamplifier unit; wherein the amount of feedback set by said feedback amount setting means becomes smaller as the level that has been detected by said level detection means becomes higher; and wherein said power amplifier amplifies the electrical signal in conformance with the output of said preamplifier unit and said feedback signal, the feedback amount of which has been set by said feedback amount setting means.