YAMAHA Equalizer MODEL Q2031B Please check the condition in the images. This is a vintage item, so please purchase only if you understand this. Sound output has been confirmed. Since I only had phone cables, I connected with phone cables to check the sound. If you're interested in buying if you can confirm XLR functionality, please let me know and I'll borrow a cable to test it for you. I used XLR to output sound about a month ago. I haven't used it since then, so I'm selling it. I confirmed the sound output with phone cables. Each knob responds. I did a simple check. No claims, no returns. Returns are not accepted. If you don't mind the small details, it can be used normally. The following is an automatically generated description, so please research it in detail online. A 2-channel band graphic equalizer with a high-pass filter function. - Model: Yamaha - Number of channels: 2 channels - Frequency range: 20Hz - 20kHz - Output terminals: XLR and TRS outputs - Input terminals: XLR and TRS inputs - Equalizer type: 31-band graphic equalizer - HPF function: Equipped with a high-pass filter Thank you for viewing.