The Radial Q4 is a single channel 500 Series 4-band semi-parametric equalizer with discrete electronics. The outside bands are fixed-frequency shelves, and the two middle bands have continuously variable adjustment for center frequency and selectable Q.

Product Specs

  • Q4 500 Series 4-Band EQ
  • Brown
  • 2010s

From the Price Guide

Reviews for the Radial Q4 500 Series 4-Band EQ
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  • Great sounding EQ, build like a tank!

    Verified Purchase

    I recently purchased a pair of the Radial Q4s on Reverb. The pros: Build like a tank, very smooth dials. The eq sounds great and is very versitle in the midband range as it has 2 sweepable mid bands. The cons: Set frequencies on the low and high bands. IMO, there should at least be a few more opt…