... after received.Product DescriptionKT12 12" Karaoke speaker KTV Karaoke System, KTV Amplifier, Professional Karaoke Speaker; Pro Audio, BMB 450 ... Home Speaker, DSP Power Amplifier, Two way Karaoke Speaker, 10" Karaoke Speaker, 250W Karaoke Speaker, BMB 850 style KTV speaker. ... are a must. APPLICATIONS—coffee bar-- background music—small conference place--AV presentationsSpecification as follows: