Unfortunately these equalizers, at best, only support two channels for cost effective mono or stereo operation.

They are typical designed around analog circuitry but some modern designs can use digital signal processing to achieve the same result. They come as either fixed frequency band with adjustable cut and boost or parametric equalizers that allow you to also adjust frequency and Q (bandwidth) of the center frequency over which the cut and boost is applied. They are placed in line with your line level active speaker feeds or between your receiver/pre-amp/processor line level output and input to your power amplifiers. The original and simplest are manual equalizers. There are several techniques and technologies available to equalize either just your subs, satellites or all your satellite speakers and subs. Let’s take a look at the technologies and techniques that are available to the average user that can optimize their listening environment without bringing in audio consultants and breaking the bank. In fact many residential rooms are so poorly acoustically treated, due to their multi-function or even dedicated use, that electronic equalization (room correction) is the only way to achieve an optimal listening environment. You have done your best at treating your rooms acoustics with all those broadband absorber panels, diffusers and bass absorbers so what’s next? Very few rooms even if professionally designed for commercial use provide a frequency and time response that can be considered ideal without the use of some form of electronic equalization. Sub Response After Equalization Introduction

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