I am listing the Maag Audio EQ4. This is a mono EQ that conforms to the API 500 series standard. It is perfect for vocals, drums, acoustic instruments, and more! It is in good working condition with no issues. It was used in a smoke-free, pet-free studio environment. Accessories are as shown in the photos. Please take advantage of this opportunity if you need it. [Product Information] 6 band equalizer with AIR BAND - SUB band for thick kick drums and bass - 40Hz band to smooth electric bass - 160Hz, effective for reducing vocal resonance when cut - 650Hz, to bring vocal tracks forward when boosted - 2.5 kHz for vocal accents and aggressive rock guitars - AIR BAND to add sparkling high frequencies while maintaining the original sound This is a 6-band equalizer equipped with the "AIR BAND" (2.5kHz-40kHz shelf boost) for the API 500-6B lunchbox and 500VPR rack systems. As the successor to the EQ3 and EQ3-D, the EQ4 offers unparalleled transparency and top-end presence while maintaining the natural sound behind the mix. EQ adjustments minimize phase shift, and stepped controls allow for easy recall of settings.