Stagg 3/4 Electric Upright Bass - Black This electric double bass features solid maple construction and state-of-the-art electronics specially designed for double bass. It has the warm, natural sound of an acoustic instrument without the hassle of stage feedback. It has Volume and Bass controls along with a ? in. output jack for audio, a 1/8" stereo mini jack input for CD/MP3 player and a 1/8" stereo mini jack output for headphones.