【Negotiable Price - Feel Free to Inquire】 Behringer EX1200 (Ultrabass Pro) Digital Subharmonic Synthesizer This is an effects unit that analyzes the low-frequency components of an inputted audio signal and generates "ultra-low" frequencies one or two octaves below. It doesn't simply boost; it adds natural bass that complements the sound source. ■ Japanese manual available: <https://synthmanuals.com/manuals/behringer/ex1200/user_manual_japanese/ex1200_p0061_m_ja.pdf> ■ This is an older item, so please consider it as junk. ■ I used it for PA effects. ■ There aren't many of these on the market, and they are difficult to obtain. 【Overview of Functions and Operation】 1. Subharmonic Generation FREQUENCY (Processing Upper Frequency Limit) Select "LOW (one octave down)" or "ULTRA-LOW (two octaves down)" with the SUBHARMONICS switch. DYNAMIC PUNCH (Punchy Bass): Threshold setting for the signal, with a de-glitching function if unnecessary. BASS MODE: Adjusts the mix of generated bass and original bass (from punchy to warm). Control the intensity of the added bass with BASS LEVEL. 2. Limiter Section Adjust how much bass is allowed with the THRESHOLD setting. The GAIN REDUCTION meter visually confirms the limiter's operating status. 3. Satellite (Output) Section Switch the crossover with the X-OVER switch (FULL RANGE / SPLIT). Specify whether to include the generated bass in the main output with the ULTRABASS switch. Adjust the main (or satellite) output level with SATELLITE LEVEL. Left/Right level meters for output level. 【Actual Applications/Usage Examples】 Clubs/Discos/Cinemas/PA/Home Theaters, etc.: Ideal for creating "powerful low frequencies" in small to large-scale systems. Home Audio Systems: Insert between tape monitors or pre-main amplifiers to add dynamic bass to rear speakers.