用頭戴式耳機(jī),，尤其是小型耳機(jī)聽音樂，總感到音樂味不夠足,，在低頻段的效果更差,。因此用本機(jī)增強(qiáng)耳機(jī)的低頻特性,，并采用立體聲反相合成的辦法，加上內(nèi)藏簡易矩陣環(huán)繞聲電路,，能獲得強(qiáng)勁的低音和在較寬的范圍內(nèi)展寬音域,。

    本機(jī)稱為超級(jí)廣場效果。這種扣人心弦的力量,，不亞于實(shí)況立體聲,。

  電路原理

 本機(jī)電路大致可分為下面三部分：
    1.由電阻電容組成的低頻增強(qiáng)電路。
    2.利用功率放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器" title="放大器">放大器IC的反饋輸入,，組成立體聲反相合成電路,。
    3.利用功率放大器IC,組成頭戴耳機(jī)的驅(qū)動(dòng)電路。
    從輸入端IC之間的電阻電容起到增強(qiáng)低頻特性的作用,，因?yàn)榧佑须娢黄?，低頻部分的增強(qiáng)量可在0--10倍之間連續(xù)可調(diào)。
    立體聲反相合成電路IC 2腳和8腳的直流耦合電容之后,，由0.47UF和50K的電位器組成,。在此電路中，把立體聲的廣場效果成分中的高音部分左右分別反相后合成,，起到增強(qiáng)效果的作用,。
    用東芝TA7376P推動(dòng)頭戴式耳機(jī)。這種IC內(nèi)藏兩個(gè)通道,，外接元件少,，可在低電壓下工作。負(fù)載阻抗較低時(shí),，可重放出動(dòng)人效果的低頻聲音 ,。
    電源若改用5#電池，用四只串聯(lián),，電壓為6V,，可直接驅(qū)動(dòng)高輸出的揚(yáng)聲器。若將三個(gè)200UF/10V的電容增加到1000UF左右,，可獲得更好的效果,。
  元件

    所有元件沒有什么特殊的。電阻均為1/8W,。0.1UF和0.47UF的電容用獨(dú)石電容,其它的用電解電容,。電位器中，20K為雙連電位器,，50K用帶開關(guān)電位器,。插頭用立體聲插頭。

  制作

    制作極其簡單，即使是初學(xué)者,，有一天的時(shí)間就足夠了,。要留心IC的腳和電解電容的極性。
    電位器的接線比較凌亂,，不要搞錯(cuò)了,。若沒有接線錯(cuò)誤和焊接不良，一定會(huì)馬到成功,。
    接入頭戴式立體聲耳機(jī)或普通耳機(jī),，裝入電池，打開開關(guān),。若兩個(gè)旋鈕配合得好,，收聽音樂可得到極其感人的效果，,。根據(jù)聆聽的音樂和音源適當(dāng)?shù)恼{(diào)整,，這就是本機(jī)的使用方法要點(diǎn)。
    不用說,，和小型音響,，電視，CD相連會(huì)得到更佳的效果,。

說明：電路原理圖中,，W1為雙聯(lián)電位器，用于低音增強(qiáng),，W2為調(diào)節(jié)混響效果,。印刷電路板圖中，A1,，A2為左右聲道輸入,。電位器W1和W2都固定在盒子的邊緣，其中W2為帶開關(guān)的電位器,。