【図面の簡単な説明】[Brief explanation of the drawing] 第１図はこの考案の一実施例を示す分解斜視図
、第２図はその組付状態を示す斜視図、第３図は
本体側接続端子の構成を示す断面図、第４図は本
体内の各効果装置の搭載状態の一例を示す正面図
、第５図は側板を取外して第４図の矢示Ｖ方向か
ら見た側面図、第６図ａ，ｂはスピーカユニツト
側接続端子を示すものでａは外観の斜視図、ｂは
その断面図、第７図はその電気的接続状態の一例
を示す回路図、第８図ａ，ｂ，ｃ，ｄは本体内の
効果装置の他の搭載状態を示す説明図、第９図及
び第１０図は他の電気的接続状態を示す回路図、
第１１図はこの考案の他の実施例を示す正面図、
第１２図はその電気的接続状態を示す回路図、第
１３図ａ，ｂ，ｃは効果ユニツトの各種装着状態
を示す説明図、第１４図はこの考案を適用すべき
電子楽器の一例を示す正面図、第１５図はこの考
案によるサウンドシステム装置を電子楽器に格納
した状態を示す正面図である。 １，６……本体、２Ｌ，２Ｒ……スピーカユニ
ツト、３……増幅ユニツト、４……フイルタユニ
ツト、５……リバーブユニツト、１２……接続端
子（本体側）、２０Ｌ，２０Ｒ……スピーカ装置
（本体側）、２２……スピーカ群、２４……接続
端子（スピーカユニツト側）、３０……増幅装置
、４０……フイルタ装置、５０……リバーブ装置
、６０……バランス回路、１００……電子楽器、
１０１ａ……鍵盤、１１０……楽音信号形成回路
、１２０Ｌ，１２０Ｒ……スピーカ（電子楽器側
）、１３０Ｌ，１３０Ｒ……増幅装置（電子楽器
側）。 Fig. 1 is an exploded perspective view showing one embodiment of this invention, Fig. 2 is a perspective view showing its assembled state, Fig. 3 is a cross-sectional view showing the structure of the connection terminal on the main body side, and Fig. 4 is an inside view of the main body. Fig. 5 is a side view taken from the direction of arrow V in Fig. 4 with the side plate removed; Fig. 6 a and b show the connection terminals on the speaker unit side. A is a perspective view of the external appearance, b is a cross-sectional view, FIG. 7 is a circuit diagram showing an example of the electrical connection state, and FIGS. 8 a, b, c, and d are other effect devices inside the main body. An explanatory diagram showing the mounting state, FIGS. 9 and 10 are circuit diagrams showing other electrical connection states,
FIG. 11 is a front view showing another embodiment of this invention;
Fig. 12 is a circuit diagram showing the electrical connection state, Fig. 13 a, b, and c are explanatory diagrams showing various mounting states of the effect unit, and Fig. 14 shows an example of an electronic musical instrument to which this invention is applied. FIG. 15 is a front view showing a state in which the sound system device according to this invention is housed in an electronic musical instrument. 1, 6...Body, 2L, 2R...Speaker unit, 3...Amplification unit, 4...Filter unit, 5...Reverb unit, 12...Connection terminal (main unit side), 20L, 20R...Speaker device (main unit side), 22...Speaker group, 24...Connection terminal (speaker unit side), 30...Amplification device, 40...Filter device, 50...Reverb device, 60...Balance circuit, 100...Electronic musical instrument,
101a... Keyboard, 110... Musical tone signal forming circuit, 120L, 120R... Speakers (electronic musical instrument side), 130L, 130R... Amplifying device (electronic musical instrument side).