Product Detail 150 Watt Acoustic Guitar Combo Four 5 inch Woofers and a 2 inch x 4 inch Ribbon High Frequency Transducer 5 Band Graphic EQ Phase Switch and Variable Notch Filter Feedback Control 100 24-Bit Built-In Stereo Digital Effects . The "Hartke AC150 Acoustic Guitar 4x5 Amplifier, 150 Watts" is best product for you. We recommended Hartke AC150 Acoustic Guitar 4x5 Amplifier, 150 Watts