【Price Negotiation Welcome】 Behringer EX1200 (Ultrabass Pro) Digital Subharmonic Synthesizer This is an effects unit that analyzes the bass components of an inputted audio signal and generates new "ultra-low" frequencies one or two octaves below. It doesn't simply boost the bass; it adds natural low frequencies that match the sound source. ■ Japanese manual available <https://synthmanuals.com/manuals/behringer/ex1200/user_manual_japanese/ex1200_p0061_m_ja.pdf> ■ This is an old item, so please consider it as junk. ■ I used it for PA effects. ■ There are few units on the market, and it's almost impossible to obtain. 【Overview of Functions and Operation】 1. Subharmonic Generation FREQUENCY (Processing Upper Limit Frequency) 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/Examples of Use】 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 and pre-main amplifiers to add dynamic bass to rear speakers.