Additional Explanation: * I always used the speaker connectors for output, so I didn't notice, but the plastic part of the horn output is slightly chipped. You can still connect a horn jack and output sound, but using the speaker connectors, which can be secured, is recommended. Otherwise, there were no problems. Due to the above, I will significantly reduce the price and sell it as junk. Take this opportunity to consider this easy-to-use, high-output powered mixer with reverb. 12-channel powered mixer, equipped with 3-band EQ and level meters for versatile use. - Brand: Yamaha - Model: EMX512SC - Number of Channels: 12 channels - Output Type: Powered Mixer - Connection Terminals: XLR input, RCA output - Power Cable: Included - EQ Function: 3-band EQ - Special Features: Level meters on each channel Thank you for viewing. I was able to adjust the sound output, high, mid, low, and effects on all channels. Output was also possible without any problems from both the main speaker connectors and the horn output.