THE EQ4M IS MÄAG AUDIO’S FLAGSHIP MASTERING EQUALIZER. IT IS BASED ON THE COMPANY’S ORIGINAL 6-BAND NTI EQ3 AND LIKE THAT ORIGINAL 2U EQUALIZER, THE 1U EQ4M ALSO INCLUDES CLIFF MÄAG’S UNIQUE AND NOTEWORTHY AIR BAND® SHELVING EQUALIZER FIRST INTRODUCED IN 1993 WITH THE NTI EQ3.
THE EQ4M HAS GARNERED SIGNIFICANT PRAISE AS “THE MOST MUSICAL-SOUNDING EQUALIZER 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 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 EQ4M HAS SIX EQ BAND SECTIONS. THEY ARE DIVIDED INTO FOUR FIXED FREQUENCY BELL-SHAPED EQUALIZER SECTIONS, A 2.5KHZ SHELVING EQUALIZER SECTION, AND THE AIR BAND EQUALIZER 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 CENTER 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.
