Roland BA-330 Portable All-in-One PA System - Used I purchased this and used it for Vocaloid P live performances and other events. It's very durable and quite convenient. It can be used with an AC adapter or batteries. Original price: 77,000 yen (tax included) The BA-330 is a powerful portable PA system that can run on batteries. With cutting-edge digital technology, it delivers high sound quality and sound pressure that surpasses the conventional wisdom of battery-powered amplifiers, and can reproduce wide sound with stereo speakers. High-performance stereo portable PA amplifier that can be powered by batteries. The BA-330 is a stereo portable PA system that allows for easy stereo playback with just one unit. It achieves high efficiency and high sound quality with the latest digital technology. The unit also incorporates digital effects and a 6-channel mixer, making it an all-in-one PA system. In addition, when using batteries, it can operate for 8 hours with alkaline batteries and up to 10 hours with nickel-metal hydride rechargeable batteries. Achieves high sound quality and powerful sound pressure with stereo specifications. The BA-330 employs a stereo speaker system. It enables the reproduction of sound sources with a wide range. The speaker placement has an angle facing outwards, ensuring a wide service area. It is possible to obtain an effective stereo feel with the BA-330 alone. In addition, while being a battery-powered amplifier, the sound pressure level※ achieves a maximum volume of 109dB. Furthermore, the stereo link function, which connects two BA-330s, allows you to build a high-power system. All-in-one for easy setup. The BA-330 is equipped with a 6-channel mixer that supports a variety of inputs. You can build a live setting PA simply by connecting microphones and instruments directly to the unit. In addition to the 6-channel input, it is also equipped with an AUX IN terminal that can connect external audio devices such as digital audio players. Equipped with high-quality reverb, delay, anti-feedback, and other features. The BA-330 has a built-in high-quality reverb/delay that is ideal for vocals. You can also switch it on/off for each channel, allowing for vocal/instrument performances with rich sound.