Feature: 1. FOR PRACTICING, PLAYING AND RECORDING: Bass guitar preamplifier DI box, with impulse response (IR) loader and audio interface for practicing, playing and recording in the box 2. 3 BAND EQUALIZER: 3 band equalizer with IF selector, provide driving hybrid control, useful and practical 3. NOISE REDUCTION: Built in noise reduction function, XLR DI output, noise level is ‑93dBu (A weighted), bring good sound quality 4. MICRO B USB INPUT: Micro B USB input for firmware update, software control, infrared loading and audio streaming 5. STURDY AND DURABLE: Bass preamp adopt good quality metal material, easy to conduct electricity, shiny, sturdy and durable Specification: Item Type: Bass Preamp Material: Metal Colour: Black Sampling Frequency: 48KHz A or D Conversion Accuracy: 32 Bits Signal Processing Accuracy: 32 Bits Frequency Response Range: 20Hz~20KHz - ±1dB Noise Level: -93dBu(A weighted) Dynamic Range: 100dB Maximum Input: +14dBu Maximum Output: +14dBu EQ Control: The preamp mode is MLD preamp mode enabled by default Low frequency ±12dB at 40Hz IF ±17dB at 160Hz~1000Hz Frequency sweep 160Hz~1000Hz High frequency ±12dB at 8000Hz Product Power Supply: 9V DC external positive and internal negative(not included). Package List: 1 x Bass Preamp1 x User Manual