The Maag Audio EQ4M has garnered significant praise as “the most musical-sounding equaliser ever made” because of its classic design, component quality, and high voltage power supply. Powered by an internal high current +/- 18-volt regulated power supply, the Maag Audio EQ4M has a maximum output level of +28.5 dBu while driving 600-ohm load impedances. The unit measures only -2 dB down at the extremes of 10hz and 75khz—essentially a flat frequency response in the audio range.
Each channel of the Maag Audio EQ4M has six eq band sections. They are divided into four fixed frequency bell-shaped equaliser sections, a 2.5khz shelving equaliser section, and the air band equaliser with a choice of 2.5, 5, 10, 15, 20, and 40 kHz frequencies. The five frequency bands in the main section are: sub or 10 Hz, 40 Hz, 160 Hz, 650 Hz, and the 2.5 kHz shelving eq.
All eq sections have a boost/cut range of +15dB and -4.5 dB with centre position detent at 0 db. The air band section has its own bypass button and there are separate hardwire bypass switches for each channel. Each channel also has an input attenuator control with a 0 to -10db range and both a green signal present led (-20 dBu) and a red peak led that flashes with +23 dBu peaks.
